Science > Meetings > 2020 > 235th AAS Meeting

235th AAS Meeting

NRAO Town Hall


This Town Hall will inform the AAS membership about the status of science, science operations, and development programs at the National Radio Astronomy Observatory (NRAO). An opening reception will be followed by a brief presentation that will update the membership regarding: (a) scientific opportunities and technical development at the Atacama Large Millimeter/submillimeter Array (ALMA), the Karl G. Jansky Very Large Array (VLA), and the Very Long Baseline Array (VLBA); (b) recent science results from across the community and the Observatory; and (c) scientific and technical planning for future radio astronomy research facilities, including a next generation Very Large Array (ngVLA). 

Confirmed speakers: 

  • Tony Beasley (NRAO Director)
  • Amy Kimball (VLA Sky Survey Scientist)
  • Eric Murphy (ngVLA Project Scientist)

The Scientific Quest for High Angular Resolution

The NRAO and the ngVLA Project convened a Special Session entitled "The Scientific Quest for High Angular Resolution" on 7 January 2020 at the American Astronomical Society (AAS) winter meeting.

Sensitive ground- and space-based astronomical observations acquired at high angular resolution are enabling new insights across many frontier fields of astrophysics, such as star and planet formation.  At the dawn of multi-messenger astrophysics, radio-wavelength follow-up at high angular resolution of gravitational wave sources is providing critical insights into the energetics and evolution of these events.  Improvements in observations at high angular resolution are also enabling deep proper-motion measurements and surveys, vastly increasing the cosmic volume across which scientists can meaningfully observe protoplanetary disk formation, black hole feeding, jet launching, Local Group dynamics, and much more.  These observational insights are propagating into a much improved theoretical understanding of the physics driving each of these frontier fields.

This Special Session:

  • Highlighted recent scientific breakthroughs enabled by imaging at high angular resolution;
  • Described planned near- and long-term resolution improvements for ground- and space-based facilities;
  • Discussed major scientific leaps likely to result from even higher angular resolution across the electromagnetic spectrum; and
  • Reviewed the importance of high angular resolution to the high-priority science themes of the great observatories to be commissioned in the next decade.

This Special Session featured a session of invited oral presentations and an associated poster session with contributed presentations.  The Special Session's science program appears below.

Presentations can be downloaded by clicking on the presentation titles.

Oral Session ID     Presenter         
Title
355.01 J. Huang Resolving Terrestrial-Scale Planet Formation
355.02 S. Dodson-Robinson Direct Detection of Planets in the Habitable Zone
355.03 G. Ortiz-Leon Stellar Astrometry
355.04 J. Miller-Jones Astrometry of Compact Objects
355.05 K. Asada The Event Horizon Telescope Next Steps
355.06 F. Davies A VLBA Measurement the Relative Proper Motion of M87 and M84
355.07 A. Reines Wandering Massive Black Holes in Dwarf Galaxies Revealed by High-Resolution VLA Observations
Poster Session IDPresenter        
Title
364.01 E. Murphy Science with a next generation Very Large Array
364.02 M. McKinnon The ngVLA: A Technical Overview
364.03 J. Kern Data Processing Architecture and Scaling for the ngVLA
364.04 A. Beasley Antenna Concept for the Next-Generation Very Large Array
364.05 V. Rosero ngVLA Antenna Configuration Options and Performance Estimates
364.06 J. Braatz Long Baseline Capabilities of the ngVLA
364.07 B. Mason NGVLA Short Baseline Array: Design and Quantitative Evaluation
364.08 B. Butler Calibration Strategies for the ngVLA
364.09 J. Wrobel ngVLA Operations Concept
364.10 J. Tobin The NRAO Science Ready Data Products Program in the Era of ngVLA
364.11 J. Ott CARTA: Cube Analysis and Rendering Tool for Astronomy
364.12 K. Akiyama Exploring Regularized Maximum Likelihood Reconstruction for the ngVLA: Stellar Imaging as a Case Study
364.13 A. Fourie ngVLA: Opportunity for the development of an integrated Broader Impact Strategy
364.14 D. Wilner ngVLA Key Science Goal 1: Unveiling the Formation of Solar System Analogues on Terrestrial Scales
364.15 A. Isella ngVLA Key Science Goal 2: Probing the Initial Conditions for Planetary Systems and Life with Astrochemistry
364.16 J. Ramsey Observing kinematics on AU-scales in B335 with ALMA
364.17 B. McGuire Beyond Dark Clouds: Carbon Chemistry in Protostars with the ngVLA
364.18 D. Dale ngVLA Key Science Goal 3: Charting the Assembly, Structure, and Evolution of Galaxies Over Cosmic Time
364.19 P. Patil Young Radio AGN in the ngVLA Era: An Example of Obscured Quasars with Young Radio Jets
364.20 M. Lacy Radio polarimetry of AGN at high resolution
364.21 G. Bower ngVLA Key Science Goal 4: Fundamental Physics with Galactic Center Pulsars
364.22 J. Lazio ngVLA Key Science Goal 5: Understanding the Formation and Evolution of Black Holes in the Era of Multi-Messenger Astronomy
364.23 W. Armentrout The Green Bank Array - Science from Ten ngVLA Antennas at the GBT
364.24 M. East In-Space Assembled Telescope Production

 

Breakthrough Science with the Atacama Large Millimeter/submillimeter Array

aas228_almasession.jpg

This AAS Special Session will update the community on the capabilities, news, and science from the Atacama Large Millimeter/submillimeter Array (ALMA). ALMA is among the largest multi-national science projects in the world, and has been conducting astronomical observations since October 2011. Now in Full Operations, ALMA Cycle 7 science observing will begin in October 2019.

ALMA is a complete imaging and spectroscopic telescope operating at millimeter and submillimeter wavelengths. It offers an unprecedented new look at our Universe near and far, from direct imaging of planet formation to groundbreaking observations of the first stars and galaxies. ALMA provides unprecedented sensitivity, image fidelity, and angular resolution at these wavelengths and enables forefront research with stunning images and spectroscopy.

This Special Session will feature an overview on the status of the Joint ALMA Observatory by the ALMA Director followed by invited science talks that highlight recent results from the first ALMA Large programs, results from the Event Horizon Telescope (EHT), and breakthrough results from other ALMA projects. The science talks will include: (1) the molecular and physical origins of planetary systems as observed by the Disk Substructures at High Angular Resolution Project (DSHARP) and others; (2) direct imaging of the supermassive black hole in M87 via Very Long Baseline  Interferometry using the EHT; (3) the interplay between the small-scale physics of gas and star formation with galactic structure and evolution as studied by the Physics at High Angular resolution in Nearby GalaxieS (PHANGS) project; and (4) the ALMA Spectroscopic Survey in the Hubble Ultra Deep Field (ASPECS) project. We will also describe the role of the North American ALMA Science Center in supporting Principal Investigator and archival research by North American investigators. 

ALMA, an international astronomy facility, is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), MOST and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile.