Predictions on observing hot holographic quark star with gravitational waves

Abstract

We extract the equation of state of hot quark matter from a holographic 2+1 flavor QCD model, which could form the core of a stable compact star. By adding a thin hadron shell, a new type of hybrid star is constructed. With the temperature serving as a parameter, the EoS varies and we obtain stable stars with mass ranging from about 5 to 30 solar masses, and the maximum compactness around 0.2. The I-Love-Q-C relations are further discussed, and compared with the neutron star cases. These compact stars are candidates for black hole mimickers, which could be observed by gravitational waves and distinguished by properties like nonzero tidal Love number and electromagnetic signals.

15 pages, 8 figures, 1 table; v2: typos corrected, published version

References in corpus (27)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Multi-messenger Observations of a Binary Neutron Star Merger
• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run
• Tidal Love numbers of neutron stars
• Constraining neutron star tidal Love numbers with gravitational wave detectors
• Equation of state and QCD transition at finite temperature
• Cold Quark Matter
• Thermodynamics and bulk viscosity of approximate black hole duals to finite temperature quantum chromodynamics
• A holographic critical point
• Black hole mimickers: regular versus singular behavior
• Why I-Love-Q
• Maximum gravitational mass $M_{\mathrm{TOV}}=2.25_{-0.07}^{+0.08}{M}_{\odot }$ inferred at about $3\%$ precision with multimessenger data of neutron stars
• Breaking the sound barrier in AdS/CFT
• Probing QCD critical point and induced gravitational wave by black hole physics
• Plausible presence of new state in neutron stars with masses above $0.98M_{\mathrm{TOV}}$
• Phase structure and critical phenomena in 2-flavor QCD by holography
• Universal relations for compact stars with heavy baryons
• Holographic cold dense matter constrained by neutron stars
• Universal relations for compact stars with exotic degrees of freedom
• Dark Stars and Gravitational Waves: Topical Review
• I-Love-Q to the extreme
• Quasi-universal relations for generalized Skyrme stars
• Dark I-Love-Q
• Deriving Neutron Star Equation of State from AdS/QCD
• A holographic study on QCD phase transition and neutron star properties
• Hot Holographic 2-flavor Quark Star