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Title: Neutron star mergers chirp about vacuum energy

Abstract

Observations of gravitational waves from neutron star mergers open up novel directions for exploring fundamental physics: they offer the first access to the structure of objects with a non-negligible contribution from vacuum energy to their total mass. The presence of such vacuum energy in the inner cores of neutron stars occurs in new QCD phases at large densities, with the vacuum energy appearing in the equation of state for a new phase. This in turn leads to a change in the internal structure of neutron stars and influences their tidal deformabilities which are measurable in the chirp signals of merging neutron stars. By considering three commonly used neutron star models we show that for large chirp masses the effect of vacuum energy on the tidal deformabilities can be sizable. Measurements of this sort have the potential to provide a first test of the gravitational properties of vacuum energy independent from the acceleration of the Universe, and to determine the size of QCD contributions to the vacuum energy.

Authors:
 [1];  [2];  [2]; ORCiD logo [2];  [3]
  1. Cornell Univ., Ithaca, NY (United States)
  2. Syracuse Univ., Syracuse, NY (United States)
  3. Univ. of California, Davis, CA (United States)
Publication Date:
Research Org.:
Univ. of California, Riverside, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1512287
Grant/Contract Number:  
SC0018298
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 9; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Beyond Standard Model; Cosmology of Theories beyond the SM; Phase Diagram of QCD

Citation Formats

Csáki, Csaba, Eröncel, Cem, Hubisz, Jay, Rigo, Gabriele, and Terning, John. Neutron star mergers chirp about vacuum energy. United States: N. p., 2018. Web. doi:10.1007/jhep09(2018)087.
Csáki, Csaba, Eröncel, Cem, Hubisz, Jay, Rigo, Gabriele, & Terning, John. Neutron star mergers chirp about vacuum energy. United States. doi:10.1007/jhep09(2018)087.
Csáki, Csaba, Eröncel, Cem, Hubisz, Jay, Rigo, Gabriele, and Terning, John. Mon . "Neutron star mergers chirp about vacuum energy". United States. doi:10.1007/jhep09(2018)087. https://www.osti.gov/servlets/purl/1512287.
@article{osti_1512287,
title = {Neutron star mergers chirp about vacuum energy},
author = {Csáki, Csaba and Eröncel, Cem and Hubisz, Jay and Rigo, Gabriele and Terning, John},
abstractNote = {Observations of gravitational waves from neutron star mergers open up novel directions for exploring fundamental physics: they offer the first access to the structure of objects with a non-negligible contribution from vacuum energy to their total mass. The presence of such vacuum energy in the inner cores of neutron stars occurs in new QCD phases at large densities, with the vacuum energy appearing in the equation of state for a new phase. This in turn leads to a change in the internal structure of neutron stars and influences their tidal deformabilities which are measurable in the chirp signals of merging neutron stars. By considering three commonly used neutron star models we show that for large chirp masses the effect of vacuum energy on the tidal deformabilities can be sizable. Measurements of this sort have the potential to provide a first test of the gravitational properties of vacuum energy independent from the acceleration of the Universe, and to determine the size of QCD contributions to the vacuum energy.},
doi = {10.1007/jhep09(2018)087},
journal = {Journal of High Energy Physics (Online)},
number = 9,
volume = 2018,
place = {United States},
year = {2018},
month = {9}
}

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