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 AA03: V: Neutron-star equation of state in the 2030s |
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Sponsoring Units: DGRAV Chair: Carolyn Raithel, Institute for Advanced Study (IAS) Room: Virtual Room 3 |
Monday, April 24, 2023 8:00AM - 8:30AM |
AA03.00001: What can we learn from non-gravitational-wave probes in the next 15 years Invited Speaker: Jacquelyn Noronha-Hostler Since the first detection of gravitational waves in 2017, many new discoveries and constraints have been placed on the equation of state at large baryon densities relevant for neutron stars. These constraints have been facilitied by astrophysical observations as well as nuclear experimental data. NICER has placed constraints on the radii of two different pulsars: J0030+0451 and J0740+6620. Additionally, heavy-ion collisions experiments from RHIC at Brookhaven National Laboratory have ran the Beam Energy Scan and Fixed Target program that reach similar densities to those in neutron stars but are at finite temperatures. Measurements of the neutron skin from CREX and PREXII have helped to place constraints on the low density equation of state relevant for neutron stars. In the next 15 years many further data points should be coming both from NICER (and possible subsequent experiments) as well as the future heavy-ion collision facility of FAIR at GSI in Damstadt, Germany. Theoretical constraints from chiral effective field theory and pertubative Quantum Chromodynamics may play an important role. In this talk I will review the expected experimental and theoretical constraints over the next 15 years. |
Monday, April 24, 2023 8:30AM - 9:00AM |
AA03.00002: Dense matter science with next-generation compact binary inspirals Invited Speaker: Philippe Landry Next-generation gravitational wave detectors like Cosmic Explorer and Einstein Telescope will have the ability to detect hundreds of thousands of neutron star mergers per year, many with signal-to-noise ratios in the hundreds. Precise measurements of the neutron stars' masses and tidal properties from the inspiral part of the coalescence will unlock new insights into the unknown structure and composition of ultra-dense matter. I will discuss the prospects for learning about the neutron star equation of state with these future compact binary inspiral observations. |
Monday, April 24, 2023 9:00AM - 9:30AM |
AA03.00003: Equation-of-state measurements based on joint multimessenger data Invited Speaker: Tim Dietrich Our knowledge about dense matter explored in the cores of neutron stars remains limited, but fortunately, the detections of gravitational waves emitted from the merger of neutron stars and the corresponding electromagnetic signals provide a new way of studying supranuclear-dense material. Making use of the strength of multi-messenger astronomy, one can combine the information obtained from gravitational-wave observations, the electromagnetic counterparts of merging neutron stars with the information provided by NICER, radio pulsar observations, and heavy-ion collision experiments to derive new constraints on the neutron-star equation. As an outlook, we will use our obtained knowledge from previous observations, to anticipate how the next generation of observatories will help us to improve our knowledge about the supranuclear-dense equation of state. |
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