ALMA2019: Science Results and Cross-Facility Synergies

Session

Galaxies

II

Oct 15, 2019, 3:00 PM

T-Hotel Cagliari

Description

Chair of the session:

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...

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...