Bulletin of the American Physical Society
APS April Meeting 2022
Volume 67, Number 6
Saturday–Tuesday, April 9–12, 2022; New York
Session B01: Next-generation Gravitational Wave ObservatoriesInvited Live Streamed Undergrad Friendly
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Sponsoring Units: DGRAV DAP Chair: Jocelyn Read, California State University, Fullerton Room: Broadway North |
Saturday, April 9, 2022 10:45AM - 11:21AM |
B01.00001: Prospects for Multi-messenger Astronomy in the Era of 3G GW Detectors Invited Speaker: Alessandra Corsi A century after Einstein's prediction of gravitational waves (GWs), the 4-km scale ground-based Laser Interferometer Gravitational Wave Observatory (LIGO) unveiled GWs from merging black holes (BHs) in binary systems. Then, LIGO and Virgo together discovered GW170817, the first binary neutron star (NS) merger witnessed through both its GW siren and its electromagnetic (EM) glow at all wavelengths of light - a spectacular start of multi-messenger GW astronomy. With their subsequent observing runs, LIGO and Virgo have reported observations of tens of BH mergers and about one binary NS merger per year, while routinely issuing alerts to the broader astronomical community. Over the next 5 years, new GW+EM discoveries are expected to start trickling in as LIGO and Virgo continue to increase their sensitivity, KAGRA and LIGO India strengthen the second generation (2G) GW network, and new EM facilities become operational. At the same time, third generation (3G) GW observatory concepts are now emerging as the next frontier that will bring the full GW universe into reach and, when paired with more sensitive EM facilities, will transform the 2G-era trickle of GW+EM discoveries into a flood. In this context, starting from the example of GW170817, I will discuss prospects for multi-messenger astronomy in the 3G era, highlighting opportunities to clarify currently open questions in the field, while expanding multi-messenger studies beyond the realm of compact binary mergers. |
Saturday, April 9, 2022 11:21AM - 11:57AM |
B01.00002: Cosmic Explorer Invited Speaker: Matthew J Evans With almost 100 gravitational-wave sources detected to-date, and the first-generation facilities now over 20-years old, there is growing momentum towards the next-generation of gravitational-wave observatories. Projects are underway in Europe, Australia, Japan, India and the US to bring new ground-based observatories online. These audio-band observatories will be complemented by a wide range of efforts targeting other gravitational-wave frequency-bands. In this talk, I will focus on the US effort to build a next-generation observatory, known as Cosmic Explorer. Given the observational focus of the other talks in this session, I will highlight the unique features of Cosmic Explorer, and aspects of the detector which are behind its compelling science case. |
Saturday, April 9, 2022 11:57AM - 12:33PM |
B01.00003: Gravitational Wave Astronomy: What's Next? Invited Speaker: Emanuele Berti The observation of compact binary mergers by the LIGO/Virgo/KAGRA collaboration marked the dawn of a new era in astronomy. The planned third-generation ground-based detector (Cosmic Explorer and the Einstein Telescope) will allow us to peer far deeper, and LISA will open a new observational window at low frequencies. The gravitational radiation emitted by compact binary systems in these two frequency windows encodes important information on their astrophysical formation mechanism. Furthermore, compact objects - whether in isolation or in binaries - are excellent astrophysical laboratories to probe our understanding of high-energy physics and strong-field gravity. I will highlight the potential of Earth- and space-based detectors to further our understanding of the formation and evolution of compact binaries. I will also discuss potential smoking guns of new physics in gravitational-wave detectors, and the theoretical and observational challenges associated with their search. |
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