Bulletin of the American Physical Society
APS April Meeting 2023
Volume 68, Number 6
Minneapolis, Minnesota (Apr 15-18)
Virtual (Apr 24-26); Time Zone: Central Time
Session AA01: V: Mini-Symposium: Growing Black Holes in a Challenged World and Reflecting on Our PraxisMini-Symposium Undergrad Friendly
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Sponsoring Units: DAP Chair: Prajval Shastri, Indian Institute of Astrophysics Room: Virtual Room 1 |
Monday, April 24, 2023 8:00AM - 8:36AM |
AA01.00001: Feedback from accreting supermassive black holes in the early Universe Invited Speaker: Rebecca Davies Self-regulating "feedback" processes are required to explain many core galaxy properties including their structure, star-formation rate, and metal content. Outflows are a classic example of feedback: by removing gas and metals, they suppress star-formation and black hole growth, and this in turn reduces the strength of subsequent outflows. In this talk I will present a brief overview of feedback processes associated with accreting supermassive black holes. I will particularly focus on the properties of black-hole-driven outflows during the peak epoch of star formation and black hole growth at z~1-3 when feedback was the most active. I will conclude with an outlook towards exciting future advances made possible by new facilities including the James Webb Space Telescope. |
Monday, April 24, 2023 8:36AM - 8:48AM |
AA01.00002: Obscured Growth in the age of Roman and Massively Multiplexed Spectroscopic Facilities Andrea Petric Most bulge-dominated galaxies host black holes with masses that tightly correlate with the masses of their bulges. This may indicate that the black holes may regulate galaxy growth or vice versa or grow in lockstep. The quest to understand how, when, and where those black holes formed motivates much of extragalactic astronomy. Here we focus on a population of galaxies with active black holes in their nuclei (active galactic nuclei or AGN) that are fully or partially hidden by dust and gas: the emission from the broad-line region is either completely or partially obscured with a visual extinction of 1 or above. Though not yet precise, this limit appears to be the point at which the populations of AGN may evolve differently. Several X-ray through Radio imaging missions are geared to detect on the order of 10^5 obscured AGN. To realize the full scientific potential of these surveys, we must examine those objects using spectroscopic techniques to study their reddening properties, star-formation histories, and excitation conditions. With Roman's WFI-grism and massively multiplexed ground facilities we can efficiently measure ionized and hot molecular gas emission lines, probing star formation, AGN feedback, and gas flows in and between galaxies and the circum-galactic medium. Machine learning algorithms have immense potential at all stages of such work, from achieving superior sky subtraction for NIR ground spectra to classifying host morphologies in querying simulations. These key studies will shed light on the role of black holes in galaxy evolution during the epoch of peak growth activity. |
Monday, April 24, 2023 8:48AM - 9:00AM |
AA01.00003: Pathways to Understanding Active Galactic Nuclei: A Citizen Science Perspective Kameswara Mantha Active Galactic Nuclei (AGN) hosting galaxies are unique laboratories to study the evolution of central super-massive black holes and their pivotal role in governing the evolution of the host galaxy and surrounding intra-galactic medium. Astronomers have used multi-wavelength observational methods, numerical simulations, and Artificial Intelligence (AI) to study AGN amongst the general galaxy populations, albeit with many critical open questions yet to be answered. Crowdsourced research through citizen science platforms such as Zooniverse have been successful in recruiting tens of thousands of individuals to help with astronomy projects over the past decade. Citizen science projects can provide a means for the public to engage with a wide variety of data that might otherwise be hidden behind professional infrastructure such as instrument specific analysis pipelines. Platforms such as the Zooniverse also offer the opportunity to accelerate knowledge production by combining the relative strengths of human and machine intelligence. In this talk, I will elaborate on how several Zooniverse projects provide the public with the opportunity to learn not only about the inspiring science of AGN and their supermassive black holes, but also about the process of scientific research and engagement with scientific data alongside AI partners. |
Monday, April 24, 2023 9:00AM - 9:12AM |
AA01.00004: Toward more sustainable operations at NSF's NOIRLab Robert Nikutta As traveling scientists and astronomers who operate observatories and data centers our per-capita carbon footprint is seven times higher than the goal of the Paris Climate Agreement, which stipulate that we need to limit the world-wide per-capita CO2 equivalent emissions to 2.7 tons by 2030, and 1.5 tons by 2050, to keep global warming under 1.5C. |
Monday, April 24, 2023 9:12AM - 9:24AM |
AA01.00005: What Role Should Scientists Play in Climate Advocacy? Travis Rector
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Monday, April 24, 2023 9:24AM - 9:36AM |
AA01.00006: A wormhole toward overcoming inequity in physics: From grassroots to institutionalized initiatives Jessica Esquivel This presentation will overview initiatives created to overcome inequity in physics. We will discuss grassroots efforts like Black in Physics, APS-funded efforts like APS-IDEA, and initiatives across the DOE landscape. Successes and failures will be touched upon, concluding with a world-building exercise of the physics world we want to create. |
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