Thermal Effects in Binary Neutron Star Mergers
Abstract
We study the impact of finite-temperature effects in numerical-relativity simulations of binary neutron star mergers with microphysical equations of state and neutrino transport in which we vary the effective nucleon masses in a controlled way. We find that, as the specific heat is increased, the merger remnants become colder and more compact due to the reduced thermal pressure support. Using a full Bayesian analysis, we demonstrate that this effect will be measurable in the postmerger gravitational wave signal with next-generation observatories at signal-to-noise ratios of 15.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 2023
- DOI:
- 10.3847/2041-8213/ace5b2
- arXiv:
- arXiv:2302.11359
- Bibcode:
- 2023ApJ...952L..36F
- Keywords:
-
- Neutron stars;
- Relativistic binary stars;
- Compact objects;
- Gravitational waves;
- Gravitational wave sources;
- 1108;
- 1386;
- 288;
- 678;
- 677;
- Astrophysics - High Energy Astrophysical Phenomena;
- General Relativity and Quantum Cosmology
- E-Print:
- 9 pages, 6 figures, accepted for publication in ApJL