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 N02: Cecilia Payne-Gaposchkin Doctoral Thesis Award in AstrophysicsInvited
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Sponsoring Units: DAP Chair: Amy Furniss, California State University, East Bay Room: MG Salon A - 3rd Floor |
Monday, April 17, 2023 1:30PM - 2:06PM |
N02.00001: A Low-threshold Neutrino Search with the Askaryan Radio Array: Results and Future Prospects Invited Speaker: Kaeli A Hughes Neutrinos provide a unique window into the highest energy accelerators in the Universe. Due to only interacting weakly, they are capable of traveling directly from their sources to detectors built on Earth. They are ideal candidates for unraveling the mysteries of the ultra high energy cosmic ray flux and understanding particle physics at energies beyond the capabilities of detectors on Earth. Often, detectors are built in some of the most remote places on Earth to detect this very low flux at the highest energies. |
Monday, April 17, 2023 2:06PM - 2:42PM |
N02.00002: Development of Instrumentation and Methodology to Expand our View of Gamma-Ray Bursts Invited Speaker: Alyson M Joens Multi-messenger detections of gamma-ray bursts (GRBs) allow us to study the full historical sequence of the event as different messengers provide complementary information. Within this context of time-domain and multi-messenger astrophysics I have contributed on two fronts over the course of my Ph.D. First, I led the calibration of BurstCube, a 6U (10 x 20 x 30 cm) CubeSat sensitive to gamma-rays in the ideal energy range of the GRB prompt emission, which will increase sky coverage and thus, the probability of detecting more joint GRB/gravitational wave (GW) events. The localization and spectrum of a GRB are derived from the energy and angular dependent instrument response, therefore, accurate ground-based calibrations are required prior to launch. By leading the calibration campaigns and replicating them in simulations, I directly contributed to the scientific success of the mission. While more SGRB/GW detections are needed to further study this phenomenon, timing of the GRB prompt emission is also crucial to address the nature of the emission and subsequently the physical processes intrinsic to the relativistic outflow. Therefore, I developed a method for exploring the physical origin of the observed spectral lags in GRBs. This method allows for a more physical interpretation to be applied to spectral lag measurements which may inform on the physical processes and origin of the gamma-ray prompt emission. |
Monday, April 17, 2023 2:42PM - 3:18PM |
N02.00003: Bayesian Methods for Multi-Messenger Analysis of Supermassive Black Hole Binaries: Pulsars and Quasars and Gravitational Waves, Oh My! Invited Speaker: Caitlin A Witt Supermassive black hole binaries (SMBHBs) can lurk, often unseen, in the centers of post-merger galaxies, and pulsar timing arrays (PTAs) are rapidly approaching the sensitivities required to detect nanohertz gravitational waves (GWs) from these giant pairs. Independently, numerous electromagnetic surveys are seeking evidence of these dynamic duos’ effects on their host galaxies by searching for periodicities in time-domain observations. Combining these two methods to use multi-messenger techniques allows us to learn more about these binaries than using one messenger alone. Throughout this thesis, I have created novel methods to reach new frontiers in low-frequency GW astrophysics and electromagnetic identification of SMBHB candidates. At this interface, my thesis work has driven efforts to bring low-frequency multi-messenger discoveries into reach within |
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