ALMA2019: Science Results and Cross-Facility Synergies

Session

Cosmology

I

14 Oct 2019, 10:00

T-Hotel Cagliari

6. ASPECS: Unveiling the driver of cosmic star formation history

Dr Roberto Decarli

14/10/2019, 10:00

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

14/10/2019, 10:25

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

14/10/2019, 10:40

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

14/10/2019, 11:40

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

14/10/2019, 12:05

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

14/10/2019, 12:20

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

14/10/2019, 12:35

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...

58. A2C2S: The ALPINE ALMA C+ survey of galaxies at 4<z<6

Dr Michele Ginolfi

16/10/2019, 09:00

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

16/10/2019, 09:25

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

16/10/2019, 09:40

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

16/10/2019, 09:55

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

16/10/2019, 10:10

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...

21. Molecular clouds in a Milky Way progenitor observed 8 billion years ago

Dr Miroslava Dessauges-Zavadsky

18/10/2019, 11:10

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

18/10/2019, 11:35

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

18/10/2019, 11:50

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

18/10/2019, 12:05

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...

64. Early Metal Enrichment and Multiphase Interstellar Media in a Galaxy at Redshift 8.312

Dr Yoichi Tamura

Contributed talk