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Hot super-dense compact object with particular EoS

Tito, E. P. and Pavlov, V. I. (2018) Hot super-dense compact object with particular EoS. Astrophysics and Space Science, 363 . Art. No. 44. ISSN 0004-640X. doi:10.1007/s10509-018-3260-y.

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We show the possibility of existence of a self-gravitating spherically-symmetric equilibrium configuration for a neutral matter with neutron-like density, small mass M≪M⊙, and small radius R≪R⊙. We incorporate the effects of both the special and general theories of relativity. Such object may be formed in a cosmic cataclysm, perhaps an exotic one. Since the base equations of hydrostatic equilibrium are completed by the equation of state (EoS) for the matter of the object, we offer a novel, interpolating experimental data from high-energy physics, EoS which permits the existence of such compact system of finite radius. This EoS model possesses a critical state characterized by density ρ_c and temperature T_c. For such an object, we derive a radial distribution for the super-dense matter in “liquid” phase using Tolman–Oppenheimer–Volkoff equations for hydrostatic equilibrium. We demonstrate that a stable configuration is indeed possible (only) for temperatures smaller than the critical one. We derive the mass-radius relation (adjusted for relativistic corrections) for such small (M≪M⊙M≪M⊙) super-dense compact objects. The results are within the constraints established by both heavy-ion collision experiments and theoretical studies of neutron-rich matter.

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Alternate Title:Spherical configuration of a super-dense hot compact object with particular EoS
Additional Information:© 2018 Springer Science+Business Media B.V., part of Springer Nature. Received: 28 October 2017; Accepted: 27 January 2018; First Online: 07 February 2018.
Subject Keywords:TOV model; Equation of state
Record Number:CaltechAUTHORS:20180807-144353134
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Official Citation:Tito, E.P. & Pavlov, V.I. Astrophys Space Sci (2018) 363: 44.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88636
Deposited By: Tony Diaz
Deposited On:07 Aug 2018 21:54
Last Modified:16 Nov 2021 00:28

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