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ASD Colloquium (Hybrid)



Things in AGN Disks: Multimessenger Approaches to Understanding AGN
Saavik Ford (American Museum of Natural History, CUNY Borough of Manhattan Community College)

Active Galactic Nuclei (AGN) have been studied electromagnetically for decades, but many aspects of AGN remain uncertain to orders of magnitude, including their lifetimes, radial extent, and gas densities. Such uncertainties have important implications for many areas of astrophysics, including galactic evolution and LCDM models, due to the importance of AGN feedback in our models. However, LIGO-Virgo-KAGRA (LVK) have opened a new window in gravitational waves (GW), providing us a new probe of AGN disks—namely, stellar mass black holes that live at the midplane of AGN disks. I will discuss how we can use GW observations of merging binary black holes (BBH) from LVK to constrain parameters of AGN including their lifetimes. In addition, the recognition that there are 'things' in AGN disks opens up a wide range of new electromagnetic and possibly neutrino observing strategies. I will also look forward to the implications of these BBH mergers in AGN disks for both Rubin and the upcoming Laser Interferometric Space Array (LISA).

Date March 28, 2023
Start/End Time 03:45 PM - 05:00 PM
Location B34, W150 and Teams
Contact Scott Noble
Email Address
Event Type Seminars/Colloquia
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