skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Probing Extreme-density Matter with Gravitational-wave Observations of Binary Neutron Star Merger Remnants

Abstract

We present a proof-of-concept study, based on numerical-relativity simulations, of how gravitational waves (GWs) from neutron star merger remnants can probe the nature of matter at extreme densities. Phase transitions and extra degrees of freedom can emerge at densities beyond those reached during the inspiral, and typically result in a softening of the equation of state (EOS). We show that such physical effects change the qualitative dynamics of the remnant evolution, but they are not identifiable as a signature in the GW frequency, with the exception of possible black hole formation effects. The EOS softening is, instead, encoded in the GW luminosity and phase and is in principle detectable up to distances of the order of several megaparsecs with advanced detectors and up to hundreds of megaparsecs with third-generation detectors. Probing extreme-density matter will require going beyond the current paradigm and developing a more holistic strategy for modeling and analyzing postmerger GW signals.

Authors:
 [1];  [2];  [3];  [4];  [5]
  1. Institute for Advanced Study, 1 Einstein Drive, Princeton, NJ 08540 (United States)
  2. Department of Mathematical, Physical and Computer Sciences, University of Parma, I-43124 Parma (Italy)
  3. Dipartimento di Fisica “Enrico Fermi,” Università di Pisa, Pisa I-56127 (Italy)
  4. NSCL/FRIB and Department of Physics and Astronomy, Michigan State University, 640 S Shaw Lane, East Lansing, MI 48824 (United States)
  5. TAPIR, Walter Burke Institute for Theoretical Physics, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125 (United States)
Publication Date:
OSTI Identifier:
22654460
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 842; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BINARY STARS; BLACK HOLES; DEGREES OF FREEDOM; DENSITY; EQUATIONS OF STATE; EXCEPTIONS; GRAVITATIONAL WAVES; LUMINOSITY; NEUTRON STARS; PHASE TRANSFORMATIONS; SIMULATION; SUPERNOVA REMNANTS

Citation Formats

Radice, David, Bernuzzi, Sebastiano, Pozzo, Walter Del, Roberts, Luke F., and Ott, Christian D. Probing Extreme-density Matter with Gravitational-wave Observations of Binary Neutron Star Merger Remnants. United States: N. p., 2017. Web. doi:10.3847/2041-8213/AA775F.
Radice, David, Bernuzzi, Sebastiano, Pozzo, Walter Del, Roberts, Luke F., & Ott, Christian D. Probing Extreme-density Matter with Gravitational-wave Observations of Binary Neutron Star Merger Remnants. United States. doi:10.3847/2041-8213/AA775F.
Radice, David, Bernuzzi, Sebastiano, Pozzo, Walter Del, Roberts, Luke F., and Ott, Christian D. Tue . "Probing Extreme-density Matter with Gravitational-wave Observations of Binary Neutron Star Merger Remnants". United States. doi:10.3847/2041-8213/AA775F.
@article{osti_22654460,
title = {Probing Extreme-density Matter with Gravitational-wave Observations of Binary Neutron Star Merger Remnants},
author = {Radice, David and Bernuzzi, Sebastiano and Pozzo, Walter Del and Roberts, Luke F. and Ott, Christian D.},
abstractNote = {We present a proof-of-concept study, based on numerical-relativity simulations, of how gravitational waves (GWs) from neutron star merger remnants can probe the nature of matter at extreme densities. Phase transitions and extra degrees of freedom can emerge at densities beyond those reached during the inspiral, and typically result in a softening of the equation of state (EOS). We show that such physical effects change the qualitative dynamics of the remnant evolution, but they are not identifiable as a signature in the GW frequency, with the exception of possible black hole formation effects. The EOS softening is, instead, encoded in the GW luminosity and phase and is in principle detectable up to distances of the order of several megaparsecs with advanced detectors and up to hundreds of megaparsecs with third-generation detectors. Probing extreme-density matter will require going beyond the current paradigm and developing a more holistic strategy for modeling and analyzing postmerger GW signals.},
doi = {10.3847/2041-8213/AA775F},
journal = {Astrophysical Journal Letters},
number = 2,
volume = 842,
place = {United States},
year = {Tue Jun 20 00:00:00 EDT 2017},
month = {Tue Jun 20 00:00:00 EDT 2017}
}