$\mathcal{g}$ modes of neutron stars with hadron-to-quark crossover transitions

Constantinou, Constantinos; Han, Sophia; Jaikumar, Prashanth; Prakash, Madappa

doi:10.1103/physrevd.104.123032

Title: $$\mathcal{g}$$ modes of neutron stars with hadron-to-quark crossover transitions

Journal Article · 21 December 2021 · Physical Review. D.

DOI: https://doi.org/10.1103/physrevd.104.123032 · OSTI ID:1979975

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Trento Institute of Fundamental Physics and Applications (Italy); European Centre for Theoretical Studies in Nuclear Physics and Related Areas, Villazzano (Italy); OSTI
University of Washington, Seattle, WA (United States); University of California, Berkeley, CA (United States)
California State University (CalState), Long Beach, CA (United States)
Ohio University, Athens, OH (United States)

Here we perform the first study of the principal core g-mode oscillation in hybrid stars containing quark matter, utilizing a crossover model for the hadron-to-quark transition inspired by lattice QCD. The ensuing results are compared with our recent findings of g-mode frequencies in hybrid stars with a first-order phase transition using Gibbs constructions. We find that models using Gibbs construction yield g-mode amplitudes and the associated gravitational energy radiated that dominate over those of the chosen crossover model owing to the distinct behaviors of the equilibrium and adiabatic sound speeds in the various models. Based on our results, we conclude that were g modes to be detected in upgraded LIGO and Virgo detectors it would indicate a first-order phase transition akin to a Gibbs construction.

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Research Organization:: Ohio University, Athens, OH (United States)

Sponsoring Organization:: USDOE Office of Science (SC); European Union’s Horizon 2020; Marie Skłodowska-Curie; National Science Foundation (NSF); Heising-Simons Foundation

Grant/Contract Number:: FG02-93ER40756

OSTI ID:: 1979975

Alternate ID(s):: OSTI ID: 2274768

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 12 Vol. 104; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: $$\mathcal{g}$$ modes of neutron stars with hadron-to-quark crossover transitions

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