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ALMA2019: Science Results and Cross-Facility Synergies

Oct 14 – 18, 2019
T-Hotel Cagliari
Europe/Rome timezone

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Contribution List

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1. Registration
10/14/19, 8:00 AM
2. Opening
Dr Emilio Molinari (INAF-Cagliari Astronomical Observatory)
10/14/19, 9:30 AM

Official greetings
3. Observatory Update
Dr Sean Dougherty
10/14/19, 9:35 AM

Invited talk
6. ASPECS: Unveiling the driver of cosmic star formation history
Dr Roberto Decarli
10/14/19, 10:00 AM

Invited Talk

Abstract:
NGC 253 is the one of the brightest molecular emitters outside the Galaxy and therefore the more suited candidate for deep molecular surveys.
In this presentation I will summarize the current status of the ALCHEMI project which an ALMA large program consisting of an unbiased line survey from ALMA bands 3, 4, 6, and 7 (85-370 GHz), whose scope was extended this Cycle...
9. An ALMA survey of CO in submillimetre galaxies
Dr Julie Wardlow
10/14/19, 10:25 AM

Contributed talk

Abstract:
The results of previous ALMA observations have given us many valuable constraints for theoretical models of protoplanetary disks (PPDs) and the formation of planets within them. While only a few years ago such dust maps suggested the mere presence of embedded planets in PPDs, via the detection of rings and gaps in the continuum emission, I will argue in this talk...
10. A mm-wave view of the hot and ionised gas in galaxy clusters
Dr Tony Mrockzkowski
10/14/19, 10:40 AM

Contributed talk

Abstract:
"We present ALMA and MUSTANG2 observations of the Sunyaev-Zeldovich effect from massive galaxy clusters, revealing pressure substructure due to mergers and feedback that can only be inferred in X-ray."
12. "Interpreting the (sub)millimeter extragalactic sky: implications for obscured star-formation in the first few Gyr after the Big Bang"
Dr Caitlin Casey
10/14/19, 11:40 AM

Invited talk

Abstract:
I will present recent modeling and observational work aimed at understanding the prevalence of dust-obscured star-formation in the first few Gyrs of the Universe’s history. Despite great effort to map the star-formation rate density in the rest-frame UV out to z~11, similar efforts to map rest-frame FIR have not kept apace. ALMA has begun to provide hints of the cosmic...
13. Caught in the act - massive cluster formation at z=3-7 witnessed by APEX/ALMA
Dr Axel Weiss
10/14/19, 12:05 PM

Contributed Talk

Abstract:
Finding and tracing the progenitors of today's massive clusters is challenging but observations of these rare systems are rich in information on cluster assembly, including brightest cluster galaxy formation, the build up of the red sequence and intra-cluster light, heating and metal-enrichment in the forming intra-cluster medium, the triggering and quenching of...
14. ALMA unveils massive galaxies at z>3 that are hidden from Hubble
Dr Tao Wang
10/14/19, 12:20 PM

Contributed Talk

Abstract:
"Our current knowledge on the cosmic star formation history at z > 3 is mainly based on galaxies identified in the ultraviolet (UV) light. However, such galaxies are known to be biased against massive galaxies, most of which are dim in the UV due to dust obscuration and/or old stellar populations. This raises important questions as to what is the true abundance of...
22. High-resolution studies of the SZ effect
Dr Luca Di Mascolo
10/14/19, 12:35 PM

Contributed talk

Abstract:
"In recent years, ALMA has allowed for probing the the Sunyaev-Zeldovich (SZ) effect at unprecedented sensitivity and angular resolution, thus opening a millimetre-wave window -- complementary to X-ray observations -- on the evolution of galaxy clusters and the physics of the intracluster medium. I will present recent results from high-resolution ALMA studies of the...
24. ALMA-IMF Large program, toward the understanding of the origin of the IMF
Dr Fabien Louvet
10/14/19, 3:00 PM

Invited talk

Abstract:
"Understanding the processes that determine the stellar Initial Mass Function (IMF) is a critical unsolved problem, with profound implications for many areas of astrophysics (Offner et al. 2014). In molecular clouds, stars are formed in cores, gas condensations which are sufficiently dense so that gravitational collapse converts most of their mass into a star or a small...
26. Probing with ALMA the evolution of cores on the cusp of star formation
Dr Rachel Friesen
10/14/19, 3:25 PM

Contributed talk

Abstract:
"While clearly a vital step in the process of star formation, the transition from prestellar core to first hydrostatic core (FHSC) or protostar has not been well studied observationally. Even with ALMA, dense condensations within starless cores are very rarely detected in large surveys. Here, we present Atacama Large Millimeter/submillimeter Array (ALMA)...
27. ALMA observations of extremely young star-forming cores
Dr Maria Jose Maureira
10/14/19, 3:40 PM

Contributed Talk
29. Converging filaments and the formation of a super star cluster in SgrB2
Dr Alvaro Sanchez-Monge
10/14/19, 3:55 PM

Contributed talk

Abstract:
"The star formation process is intimately related to the existence of disks, which mediate the accretion onto the star, and energetic outflows, which help to remove angular momentum from the system. Over the last years, this paradigm has been widely favoured for stars of all masses: from low-mass through B-type stars up to the most massive O-type stars. However, for...
11. Poster session I
10/14/19, 4:10 PM
30. Solar Astronomy with ALMA
Dr Sven Wedemeyer
10/14/19, 5:55 PM

Invited Talk

Abstract:
"Solar observing with ALMA is offered as a non-standard mode since Cycle 4. The requirements for such observations are different from many other observations with ALMA in the sense that the mapped atmospheric layers of the Sun evolve on very short timescales and the primary beam being filled with complex emission. High-cadence (snapshot) imaging is needed for such a...
31. "Probing the thermal structure of the solar chromosphere with ALMA and optical/NIR observations "
Dr Dale Gary
10/14/19, 6:20 PM

Contributed talk

Abstract:
"ALMA is a powerful new instrument that allows an unambiguous determination of the solar chromospheric temperature, and its rapid evolution. When combined with multiwavelength observations in other diagnostics, most notably strong optical/NIR spectral lines, this allows us to probe the highly structured atmosphere throughout much of its height and with high spatial...
32. A cool puzzle in the solar atmosphere
Dr Stephen White
10/14/19, 6:35 PM

Contributed talk

Abstract:
While the nature of the heating mechanism that produces a rise in temperature just above the solar surface is a critical unsolved problem in astrophysics, the fact that the heated chromosphere contains pockets of material much cooler than their surroundings is also puzzling.
ALMA observations of the solar chromosphere are unique in providing direct electron...
33. Star formation and magnetic fields in the ALMA era
Dr Chat Hull
10/15/19, 9:00 AM

Invited talk

Abstract:
"New ALMA polarization observations continue to both expand and confound our understanding of the role played by the magnetic field in low-mass star formation.  The sample of very young, Class 0 protostellar sources observed with high resolution and high sensitivity with ALMA is now large enough that we are beginning to see the same surprising features in multiple...
34. Dissipation Scale of Turbulence Cascade Revealed by ALMA
Dr Jin Koda
10/15/19, 9:25 AM

Contributed talk
36. ALMA Detection of a Linearly Polarised Reverse Shock in GRB 190114C
Dr Tanmoy Laskar
10/15/19, 9:40 AM

Contributed talk

Abstract:
"We present the earliest observation and first detection of polarized millimeter emission in a γ-ray burst with ALMA Cycle 7 Band 3 (97.5 GHz) observations of GRB 190114C. With observations spanning 2.2 to 5.2 hours after the burst, we detect linear polarization in the GRB afterglow at ~ 5σ, decreasing from Π=(0.87±0.13)% to (0.60±0.19)%, and evolving in...
37. ALMA reveals a magnetically-regulated scenario for protostellar collapse: B335 & future perspectives.
Dr Anaëlle Maury
10/15/19, 9:55 AM

Contributed talk

Abstract:
"Understanding the first steps in the formation of stars and protoplanetary disks is a great unsolved problem of modern astrophysics. Observationally, the key to constraining theoretical models lies in high-resolution studies of the youngest protostars. I will show our SMA and ALMA observations of the magnetic field topology in a sample of young protostars, and...
38. Tracing B-fields in protostellar targets across spatial scales with ALMA, SOFIA, BLAST, and APEX.
Dr Giles Novak
10/15/19, 10:10 AM

Contributed talk

Abstract:
"To understand the formation of stars and protoplanetarydisks in magnetized molecular clouds we require both (a) polarization maps of B-fields in protostellar infall envelopes, from ALMA, and (b) larger-scale B-field maps that serve to reveal the linkages - if any - between these envelope fields and the fields of the parent clouds.  We will present new results from...
39. The puzzle of protoplanetary disk masses
Dr Anna Miotello
10/15/19, 11:30 AM

Invited talk

Abstract:
"Thanks to the advent of the Atacama Large Millimeter/submillimeter Array (ALMA), large surveys of protoplanetary disks in different star forming regions have been carried out to study the gas and dust components simultaneously. Carbon monoxide (CO) and its less abundant isotopologues have been observed to trace the bulk of the gas, while the dust was traced by the...
41. The demographical properties of brown dwarf disks
Dr Leonardo Testi
10/15/19, 11:55 AM

Contributed talk

Abstract:
"The study of the properties of disks around young brown dwarfs can provide important clues on the formation of these very low-mass objects and on the possibility of forming planetary systems around them. We will report on the systematic ALMA search for cold dust around extinction limited samples of young brown dwarfs with infrared excess in the Lupus, Ophiuchus and...
42. Time-Domain Astrochemistry During Planet Formation
Dr Ilse Cleeves
10/15/19, 12:10 PM

Invited talk

Abstract:
"The chemistry of protoplanetary disks sets the initial composition of newly formed planets and may regulate the efficiency by which planets form. Disk chemical abundances typically evolve over timescales spanning thousands if not millions of years. Consequently, it was a surprise when ALMA observations taken over the course of a single year showed significantly...
43. Probing Snow Surfaces/Lines in Protoplanetary Disks
Dr Chunhua Qi
10/15/19, 12:25 PM

Contributed talk

Abstract:
"Protoplanetary disk radial and vertical thermal temperature gradients result in 2D snow surfaces, or condensation fronts. These are analogous to 1D snowlines, which are located where snow surfaces intersect with the disk midplane. CO and N2 are two of the most abundant disk molecules, and their snow surface locations could provide disk temperature structure...
44. Chemistry in luminous galaxies.
Dr Nanase Harada
10/15/19, 3:00 PM

Invited talk

Abstract:
"The chemical composition is a sensitive probe of physical condition in molecular clouds. With ALMA, astrochemical studies are possible in external galaxies. There are galaxies whose chemical composition is likely affected by starburst or AGN activities, rapid gas inflow and outflow, and shocks. I will discuss the case of the infrared luminous galaxy NGC 3256, the...
45. Sub-mm Water Vapor Megamasers in Nearby AGNs
Dr James Braatz
10/15/19, 3:25 PM

Contributed talk

Abstract:
"Water vapor megamasers in the accretion disks of active galactic nuclei uniquely probe sub-pc scale geometry and kinematics of nuclear molecular gas, provide gold-standard masses of supermassive black holes, and in some cases give geometric distances to the host galaxies, enabling a one-step measurement of the Hubble constant.  Most previous observational work on...
46. Collimation of the relativistic jet in the quasar 3C273
Dr Hiroki Okino
10/15/19, 3:40 PM

Contributed talk

Abstract:
"The relativistic jet launched from the supermassive black hole at the center of active galactic nucleus (AGN) is one of the persistent highest energetic phenomena in universe. A key question to understand the nature is how the collimation occurs, enabling the central black hole to release the accretion and/or rotational energies to a larger scale structure beyond...
47. Probing Feedback from Super Star Clusters in the Central Starburst of NGC253
Dr Rebecca Levy
10/15/19, 3:55 PM

Contributed talk

Abstract:
"Large-scale, multiphase outflows seen in nearby prototypical starburst galaxies, such as NGC253, are thought to be powered by feedback from massive stellar clusters.
Resolving these dusty compact structures outside the Milky Way system requires the spectral resolution and sensitivity of ALMA and future facilities such as the ngVLA. Using ALMA data at 350 GHz with...
48. Cold gas regulating the life-cycle of radio AGN
Dr Filippo Maccagni
10/15/19, 4:10 PM

Contributed talk

Abstract:
"ALMA observations provide a unique opportunity to study at high resolution the tight interplay between the interstellar medium (ISM) of a galaxy and the nuclear activity that may be triggered at its centre. In particular, ALMA observations of the cold molecular gas in a handful of nearby active galactic nuclei (AGN) have provided new insights on the physical...
49. Early High-Mass Star Formation: A Comprehensive ALMA ATLAS
Dr Thushara Pillai
10/15/19, 5:10 PM

Invited talk

Abstract:
I will present the results from our survey of Cold Cores with ALMA (CoCoA). Star formation research has still not revealed the initial conditions for high-mass star formation (HMSF). This is largely due to the lack of clear-cut examples of dense clumps that are bound to form stars but have not done so yet (high--mass starless clumps: HMSCs). While scattered, small sky...
50. Sub-arcsecond (sub)millimeter imaging of the massive protostellar outburst in G358.93-0.03
Dr Crystal Brogan
10/15/19, 5:35 PM

Contributed talk

Abstract:
"The recent identification of accretion outbursts in two massive protostars, both heralded by 6.7 GHz methanol maser flares, has invigorated single-dish maser monitoring programs on a quest to find more cases. As a result, a third event was discovered on 14-Jan-2019 in a poorly-studied massive star-forming region G358.93-0.03. Since then, the global maser community...
52. Dissecting high-mass protostars with SPARKS
Dr Timea Csengeri
10/15/19, 5:50 PM

Contributed talk

Abstract:
"The origin of the highest mass stars is still an enigma in modern astrophysics. The SPARKS project (Search for high-mass protostars with ALMA up to 5 kpc) is a high angular resolution follow-up of the complete sample of infrared quiet massive clumps selected from the ATLASGAL survey at 870 micron. ALMA confirms that deeply embedded high-mass protostars are already...
53. Exploring the Complex Chemistry of Young Solar Systems
Dr Jes Jørgensen
10/15/19, 6:05 PM

Contributed talk

Abstract:
Studies of the complex organic chemistry in regions of star and planet formation have taken a tremendous step forward with data from ALMA. With its unprecedented sensitivity and angular resolution, ALMA has made it possible to zoom in on the gas surrounding deeply embedded protostars on Solar System scales. Such observations reveal the details of the rich...
54. From the dense core edge to the disk scales
Dr Jaime Pineda
10/15/19, 6:20 PM

Contributed talk

Abstract:
"Dense cores are the places where stars are formed within the supersonic Molecular Clouds. These dense regions (n~10^5 cc) are cold (T~10 K) and display subsonic levels of turbulence (Mach ~ 0.5), and represent the initial conditions for both star and disk formation. Therefore, it is crucial to study dense cores to better understand the star and disk formation...
55. The early stages at substellar formation in Lupus 1 and 3 clouds
Dr Alejandro Santamaría-Miranda
10/15/19, 6:35 PM

Contributed talk

Abstract:
"The formation of brown dwarfs is still under debate. While the latest discoveries point towards a scaled-down version of the star formation process, other models, such as embryo ejection or stellar disk fragmentation, may not be discarded. Here we present our latest ALMA cycle 3 (band 6) continuum observations of Lupus 1 and 3 star formation regions based on...
58. A2C2S: The ALPINE ALMA C+ survey of galaxies at 4<z<6
Dr Michele Ginolfi
10/16/19, 9:00 AM

Invited talk

Abstract:
"A2C2S is a large survey of 122 normal star-forming galaxies observed in the [CII]-158µm line and continuum. It aims at understanding stars, gas and dust properties at a time of rapid galaxy maturation after the end of HI reionization, at redshifts 4<z<6. With A2C2S it becomes possible to trace the cosmic time evolution of the star formation rate from a complete census...
59. Early Metal Enrichment and Multiphase Interstellar Media in a Galaxy at Redshift 8.312
Dr Yoichi Tamura
10/16/19, 9:25 AM

Contributed talk

Abstract:
"How and when metal/dust enrichment happened in the epoch of reionization is one of the most fundamental questions in modern astronomy. Recent Planck results suggest an instantaneous reionization redshift of z = 7.7 ± 0.8, and the latest Hubble Space Telescope surveys have revealed strong evolution of the ultraviolet luminosity function from z ~ 10 to ~ 8, implying...
61. Quiescent carbon in the CGM of high redshift radio galaxies
Dr Carlos De Breuck
10/16/19, 9:40 AM

Contributed talk

Abstract:
"The circum-galactic medium (CGM) is the location where galaxies directly interact with their environment through accretion and feedback events. These reservoirs can cover scales of several 100s of kpc, and are mostly studied in the optical through bright emission lines such as Lyman-alpha tracing their ionized gas. However, these optical/near-IR observations are...
62. Definitive calibration of CI, CO and dust as gas mass tracers across cosmic time
Dr Loretta Dunne
10/16/19, 9:55 AM

Contributed talk

Abstract:
"Measuring molecular gas mass in galaxies relies on the use of tracers as cold H2 is invisible. Historically CO has been the workhorse tracer as it is the second most abundant molecule in the ISM. However, it is expensive to observe large samples (100,000), and at high redshift the ground state J=1-0 transition is either inaccessible or extremely challenging to...
63. Stacking analysis of CO emission based on optical spectroscopic redshifts from MUSE
Dr Hanae Inami
10/16/19, 10:10 AM

Contributed talk

Abstract:
"The origin of the rise of the star formation rate density towards z~1-3, the peak of galaxy growth, could be a large supply of molecular gas for forming stars, or a mechanism which causes high efficiency in star formation, or a combination of the two of these. The ALMA Spectroscopic Survey (ASPECS) project has conducted a spectroscopic survey in the Hubble Ultra...
72. The Event "Horizon Telescope: Imaging a Black Hole"
Dr Shep Doeleman
10/16/19, 11:10 AM

Invited talk

Abstract:
The Event Horizon Telescope (EHT) is a Very Long Baseline Interferometry (VLBI) array operating at the shortest possible wavelengths, which can resolve the event horizons of the nearest supermassive black holes. Observing at mm radio wavelengths, enables detection of photons that originate from deep within the gravitational potential well of the black hole, and travel...
73. The Size, Shape, and Scattering of Sagittarius A* at 86 GHz
Dr Lindy Blackburn
10/16/19, 11:35 AM

Contributed talk

Abstract:
"High-frequency very-long-baseline Interferometric (VLBI) observations of the Galactic Center supermassive black hole, Sagittarius A (Sgr A) have sufficient angular resolution to probe black hole accretion and outflow on event-horizon scales. We present the first unscattered image of Sgr A* taken at 86 GHz (3.5-mm) using the Global Millimeter VLBI Array (GMVA)...
75. The ALMA Galactic Center Molecular Cloud Survey
Dr Jens Kaufmann
10/16/19, 11:50 AM

Contributed talk

Abstract:
"Recent research has delivered fascinating insights into the physics of the Central Molecular Zone (CMZ; inner ~100 pc) of the Milky Way. The molecular clouds in the CMZ, though turbulent on large spatial scales (~5 pc), contain dense cores of 0.1 pc size that are not more turbulent than what is typically found closer to the Sun. Also, while these clouds are of a...
76. "ALCHEMI: The ALMA Comprehensive High-resolution Extragalactic Molecular Inventory"
Dr Sergio Martín
10/16/19, 12:05 PM

Invited talk

Abstract:
NGC 253 is the one of the brightest molecular emitters outside the Galaxy and therefore the more suited candidate for deep molecular surveys. In this presentatio i will summarize the current status of the ALCHEMI project which an ALMA large program consisting of an unbiased line survey
from ALMA bands 3, 4, 6, and 7 (85-370 GHz), whose scope was extended this Cycle to...
77. The molecular torus of NGC1068
Dr Violette Impellizzeri
10/16/19, 12:30 PM

Contributed talk

Abstract:
I will present results obtained with ALMA on the prototypical Seyfert 2 nucleus in NGC 1068. Previous CO (6-5) observation already showed evidence for a high-velocity outflow at a resolution of ∼ 0.04” resolution. We have now obtained data with a factor ∼ 2 better resolution (∼1 pc-scale) with the most extended ALMA configurations. We observed HCN J=3-2 to reveal...
79. Galactic Dynamics and Dark Matter Profile of NGC1380 with ALMA and VLT/MUSE
Dr Takafumi Tsukui
10/16/19, 12:45 PM

Contributed talk

Abstract:
ALMA’s high resolution and high sensitivity enable us to obtain kinematics of molecular gas in the center of early-type galaxies (~1kpc) complementarily to the stellar kinematics obtained with optical IFU instrument. The molecular gas kinematics is a powerful tracer of mass distribution of galaxies because the velocity dispersion is low(~10km/s) and the simple...
56. The star formation process on cloud-scales in nearby galaxies
Dr Eva Schinnerer
10/17/19, 9:00 AM

Invited talk

Abstract:
Where do stars form and how is their formation regulated across galactic disks are two critical questions for our understanding of the star formation process. High angular observations of nearby galaxies allow us to sample the star formation process across entire galactic disks reaching now
regularly the scales of the star-forming units, namely Giant Molecular Clouds...
57. ALMA view of 1 pc-scale molecular-gas structures in M33: Revealing star-formation activities in mole
Dr Atsushi Nishimura
10/17/19, 9:25 AM

Contributed talk

Abstract:
Recent mm/sub-mm observations of molecular clouds suggest that molecular gas shows highly filamentary structure from a sub-pc to ~100 pc scale and the collision/interaction of such filamentary structures may drive the massive star formation. Although some galactic studies found very long filamentary clouds with the length of 50-100 pc (e.g., the “Nessie" nebula)...
60. The first large, unbiased ALMA survey of CO at parsec resolution in the Small Magellanic Cloud
Dr Katie Jameson
10/17/19, 9:40 AM

Contributed Talk

Abstract:
The Small Magellanic Cloud (SMC) at only 1/5 solar metallicity is the only galaxy near enough to study the effect of a low metallicity environment on the physics of star formation and the ISM on small spatial scales. Understanding the effects of low metallicity is crucial for understanding galaxies in the early universe and the evolution of galaxies over cosmic...
65. Small-Scale Substructures in Protoplanetary Disks
Dr Sean Andrews
10/17/19, 11:40 AM

Invited talk

Abstract:
The Disk Substructures at High Angular Resolution Project (DSHARP) observed 20 nearby protoplanetary disks in the 240 GHz continuum and 12CO J=2-1 spectral line with the Atacama Large Millimeter/submillimeter Array (ALMA) at a resolution of 35 milli-arcseconds (5 au). This talk will describe the motivation for this project and highlight the initial DSHARP results. We...
66. A path to planets: youngest known ringed structures in a protostellar disk
Dr Dominique Segura-Cox
10/17/19, 12:05 PM

Contributed talk

Abstract:
Circumstellar disks are fundamental to the low-mass star and planet formation processes, yet their properties are only beginning to be unveiled in detail during the earliest Class 0 and I phases due to the dense gas and dust envelopes present at early times. ALMA observations of the older Class II protostar HL Tau exposed dark gaps and dust rings in the disk,...
67. How small molecules betray dust evolution in planet forming disks
Dr Michiel Hogerheijde
10/17/19, 12:20 PM

Contributed talk

Abstract:
ALMA observations of planet forming disks over the past several years have firmly established that the grains responsible for the millimeter wavelength continuum emission have undergone a significant evolution in their radial and size distribution. Many disks show clear signs of both radial drift of grains and accumulation in rings. This grain evolution is...
68. Organic Molecules in Protoplanetary Disks
Dr Jeong-Eun Lee
10/17/19, 3:00 PM

Invited talk

Abstract:
Earth-like planets form mostly from dry refractory materials in the inner regions of protoplanetary disks; however, they might become habitable if water and organic molecules are delivered to their surfaces and atmospheres by planetesimals formed beyond the sublimation front of water. Complex organic molecules (COMs), which are the seeds of prebiotic material and...
69. Observing the first phases of planet formation: measuring vertical dust settling in a sample of Edge
Dr François Ménard
10/17/19, 3:25 PM

Contributed talk

Abstract:
Planets form in Protoplanetary disks. New instruments like ALMA and VLT / SPHERE are revealing features in young disks that may be the traces of these planets: rings, gaps, spirals. The direct detection of forming planets still located inside their disk remains, however, very challenging. The consequence is that direct observational constraints on the formation...
70. Radial variations of grain sizes and dust scale heights on the protoplanetary disk of HD 163296
Dr Satoshi Ohashi
10/17/19, 3:40 PM

Contributed talk

Abstract:
HD 163296 is one of the best examples of the ring and gap structured protoplanetary disks. In addition, this disk is the only target where the ring and gap are spatially resolved in millimeter-wave polarization as well. By performing radiative transfer calculations of self-scattering polarization, we find that grain size and the dust scale height are the key...
71. ALMA Studies the Origin and Impact of Flares in Planetary Systems
Dr Rachel Osten
10/17/19, 3:55 PM

Contributed talk

Abstract:
The unanticipated detection of mm flaring in Proxima Cen by ALMA has spurred follow-on observations to understand the origin and nature of stellar flaring and its impact in planetary systems. In April through June of 2019, a coordinated observing campaign took place to further these investigations
and learn more about the relationship between particle acceleration...
74. Hydrogen Radio Recombination Line Masers observed with ALMA: Imaging of Warped Disks and Photo-evapo
Dr Izaskun Jimenez-Serra
10/17/19, 4:10 PM

Contributed talk

Abstract:
Hydrogen radio recombination lines (or RRLs) are excellent probes of the kinematics and physical conditions of the ionised gas in the ISM. The lines at sub-/millimeter wavelengths are particularly especial since they may present maser amplification. This is a rare effect that has been observed only toward a handful of objects. However, in the cases where maser RRLs...
78. ALMA observes the aftermath of mergers of non-compact stars
Dr Tomasz Kaminski
10/17/19, 5:10 PM

Invited talk

Abstract:
Red novae, a newly-recognized group of eruptive variable objects, are optical manifestations of merging non-compact stars than may be observed in real time. They represent transients erupting at luminosities intermediate between those of classical novae and supernovae. In red nova eruptions, stellar coalescence produces circumstellar environments very rich in molecular...
80. Shaping of the stellar wind of evolved red giants and their successors by (sub-)stellar binary companions
Dr Leen Decin
10/17/19, 5:35 PM

Contributed talk

Abstract:
Planetary nebulae (PNe) reveal a wide range of morphologies. Bipolarity is the main characteristic, but jets and tori are also detected. Several contending theories of the evolution from a (roughly) spherically symmetric Asymptotic Giant Branch (AGB) stellar wind to a very non-spherical PN have emerged. Here, we present the first high-spatial resolution...
81. ALMA unveils highly collimated jets in evolved stars
Dr Daniel Tafoya
10/17/19, 5:50 PM

Contributed talk

Abstract:
The mass-loss processes that occur during final stages of the evolution of low and intermediate-mass stars are of great relevance because they determine the ultimate fate of these stars, as well as the amount of mass and chemical composition of the material that will end up replenishing the interstellar medium. Thus, the study of these processes is important to...
82. HCN laser lines in carbon-rich evolved stars
Dr Ka Tat Wong
10/17/19, 6:05 PM

Contributed talk

Abstract:
HCN is one of the most abundant molecules in the circumstellar envelopes of carbon-rich AGB stars. Recent APEX surveys have revealed widespread presence of HCN maser emission in the innermost regions of these envelopes at millimetre wavelengths. Besides millimetre-range masers, HCN is also known to exhibit two intense lasers in the submillimetre frequencies near...
83. Tracing the mass loss history of WX Psc with ALMA and KVN
Dr Youngjoo Yun
10/17/19, 6:20 PM

Contributed talk

Abstract:
We present the combined results of ALMA and KVN (Korean VLBI Network) observations toward WX Psc (IRC+10011) which is a long-period variable OH/IR star. The SiO masers of v=1 and v=2, J=5-4, and the SiO thermal emission of v=0, J=5-4 were observed together with the H2O v2=1, 5(5,0)-6(4,3) and continuum emission at ALMA Band 6 in October 2017 (Cycle 5). This ALMA...
15. Chemical Diversity and Evolution toward Protoplanetary Disks
Dr Nami Sakai
10/18/19, 9:00 AM

Invited talk

Abstract:
Star and planet formation is one of the most fundamental structure-formation processes in the Universe. Physical processes of star and planet formation have widely been investigated as one of the major targets of observational astronomy and astrophysics during the last few decades. Meanwhile, star and planet formation is inevitably accompanied with the evolution of...
16. ALMA observations of the DG Tau B Class I protostar disk and CO outflow
Dr Aloïs De Valon
10/18/19, 9:25 AM

Contributed talk

Abstract:
Powerful atomic jets and molecular outflows are observed in young protostars at all stages of active accretion, from the young embedded Class 0 and Class 1 phases to the later optically revealed T Tauri or Class 2 phase. The origin of the ejection, its role in angular momentum extraction and impact on protoplanetary disk evolution remain as fundamental open...
17. Chronology of Episodic Accretion in Protostars - an ALMA survey of the CO and H2O snow lines
Dr Tien-Hao Hsieh
10/18/19, 9:40 AM

Contributed talk

Abstract:
Episodic accretion is nowadays a well accepted process in low-mass star formation, but its origin and influence on star forming process are not yet fully understood. We present an ALMA survey of N2H+ (1 − 0) and HCO+ (3 − 2) toward 39 Class 0 and Class I sources in the Perseus molecular cloud. N2H+ and HCO+ are destroyed via gas-phase reactions with CO and H2O,...
18. Probing fragmentation and velocity sub-structure in the massive NGC 6334 filament with ALMA.
Dr Yoshito Shimajiri
10/18/19, 9:55 AM

Contributed talk

Abstract:
"Herschel imaging surveys of Galactic interstellar clouds support a paradigm for low-mass star formation in which dense molecular filaments play a crucial role. The detailed fragmentation properties of star-forming filaments remain poorly understood, however, and the validity of the filament paradigm in the high-mass regime is still unclear. Here, we investigate...
19. Sounding diffuse molecular gas with ALMA as a mean to prove that the CO-dark gas is molecular
Dr Maryvonne Gerin
10/18/19, 10:10 AM

Contributed talk

Abstract:
Studies of the dust continuum emission and extinction, and of the gamma ray emission show that a fraction of the interstellar gas is not traced by the combination of HI 21 cm and CO J=1-0 emission lines. The nature and physical conditions of this so called CO-dark gas are debated. We have used ALMA to search for molecular absorption towards distant quasars in the...
21. Molecular clouds in a Milky Way progenitor observed 8 billion years ago
Dr Miroslava Dessauges-Zavadsky
10/18/19, 11:10 AM

Invited talk

Abstract:
Thanks to the remarkable ALMA capabilities and the unique configuration of the Cosmic Snake galaxy behind a massive galaxy cluster, we could, for the first time, resolve molecular clouds down to 30 pc linear physical scales in a typical Milky Way progenitor at z=1.036 through CO(4-3) observations performed at 0.2'' angular resolution. We identify 17 individual giant...
23. First Identification of 10-kpc Scale [CII] 158um Halos around Star-Forming Galaxies at z=5-7
Dr Seiji Fujimoto
10/18/19, 11:35 AM

Contributed talk

Abstract:
We report the discovery of 10-kpc scale [CII] 158um halos　surrounding star-forming galaxies in the early Universe. We　choose deep ALMA data of 18 galaxies each with a star-formation rate of ~ 10-70 Msun with no signature of AGN whose [CII] lines are individually detected at z=5.153-7.142, and conduct stacking of the [CII] lines and dust-continuum in the...
25. The ALMA lensing cluster survey: initial outcomes
Dr Kotaro Kohno
10/18/19, 11:50 AM

Cotributed talk

Abstract:
The ALMA lensing cluster survey (ALCS) is an on-going cycle-6 large program to observe high magnification regions of 33 lensing clusters to expand the surveyed volume of high-redshift dust-continuum-selected and line-emitting galaxies. The ALCS covers 88 arcmin^2 in total, to a depth of 80 uJy (1.2 mm, 1 sigma), achieved by using a 15-GHz-wide spectral scan. The...
28. Massive Galaxy Formation in the Reionization Era
Dr Daniel Marrone
10/18/19, 12:05 PM

Contributed talk

Abstract:
SPT0311-58 is a system of interacting galaxies at z=6.9, found via its millimeter-wave dust emission in the South Pole Telescope sky survey. Unlike most galaxies known in this era, which are relatively low-mass and dust-poor star forming galaxies, the constituents of this system are massive objects with significiant dust and gas content. ALMA has provided an...
35. Conference Summary
Dr Fukagawa Misato
10/18/19, 12:50 PM
64. Early Metal Enrichment and Multiphase Interstellar Media in a Galaxy at Redshift 8.312
Dr Yoichi Tamura

Contributed talk
51. End of daily programme
40. Revolutionizing Our View of Protostellar Disk and Multiplicity: The VLA/ALMA Nascent Disk and Multiplicity Survey"
Dr John Tobin

Contributed talk

Abstract:
"We have conducted a large survey of 328 protostars in the Orion star forming regions at ~40 AU (0.1"") resolution, using ALMA (0.87 mm) and the VLA (9 mm). This large sample was derived from Spitzer and Herschel surveys and constitutes the majority of the protostars in Orion, providing a statistical characterization of the protostellar disk and multiplicity...
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