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 F06: Physical Review: Gravitational Waves: Looking into the Crystal BallInvited Undergrad Friendly
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Sponsoring Units: DGRAV DAP DPF Chair: Abhishek Agarwal, APS Room: MG Salon F - 3rd Floor |
Sunday, April 16, 2023 8:30AM - 9:06AM |
F06.00001: The population puzzle: preparing for an ever-increasing gravitational-wave catalog. Invited Speaker: Lieke van son The field of gravitational-wave astronomy is rapidly unfolding as the event catalog grows from O(10) to O(100). As we are moving from excitement about individual sources to a big-data era, increasingly detailed population properties can be inferred. |
Sunday, April 16, 2023 9:06AM - 9:42AM |
F06.00002: Gravitational Wave Backgrounds Invited Speaker: Vuk Mandic Gravitational wave background arises as a superposition of many uncorrelated gravitational wave sources of either cosmological or astrophysical origin. For each individually observed merger of a binary black hole or a binary neutron star system, there are many more that remain undetected as they are too far and too faint. This ensemble of compact binary mergers, however, gives rise to a gravitational wave background that carries information about the distant population of binaries, complementing the individually detected nearby ones. Furthermore, gravitational wave background is expected to be formed in the early universe through processes such as inflation, phase transitions, or cosmic strings dynamics. Detection of the early universe background would, therefore, provide unique information about particle physics of very high energies that may be unreachable in laboratories. With improved sensitivity in the upcoming observation runs of terrestrial gravitational-wave detectors Advanced LIGO, Advanced Virgo, and KAGRA, some of the astrophysical and cosmological models of gravitational wave background will be within reach. I will review the landscape of gravitational wave background models and I will discuss the prospects for detecting the background in upcoming observations. I will also discuss complementarity of these observations with other experiments and observations, such as future collider experiments and electromagnetic observations of structure formation. |
Sunday, April 16, 2023 9:42AM - 10:18AM |
F06.00003: Beyond Linear Ringdown Invited Speaker: Macarena Lagos After the merger of two black holes (BHs), there is a distorted remnant black hole that rings down to its final stationary state by emitting gravitational waves (GWs). This ringdown post-merger signal is typically modelled analytically using linear perturbation theory, which assumes that the spacetime distortions associated to the GWs are small. Surprisingly, research has shown that linear theory can model the GW signal extremely well even at the moment of the merger, when the spacetime is expected to be largely distorted and the nonlinear nature of gravity is expected to become important. |
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