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ORIGINAL RESEARCH article

Front. Astron. Space Sci.
Sec. Cosmology
Volume 11 - 2024 | doi: 10.3389/fspas.2024.1421839
This article is part of the Research Topic Neutron Stars and Quark Stars Inside Out View all 3 articles

Hadron-quark phase transition in the neutron star with vector MIT bag model and Korea-IBS-Daegu-SKKU functional

Provisionally accepted
Debashree Sen Debashree Sen 1Hana Gil Hana Gil 1Chang Ho Hyun Chang Ho Hyun 2*
  • 1 Korea University, Seoul, Republic of Korea
  • 2 Daegu University, Gyeongsan, Republic of Korea

The final, formatted version of the article will be published soon.

    Employing the Korea-IBS-Daegu-SKKU (KIDS) density functional for the hadron phase and the MIT bag model with vector (vBag) model for the quark phase, we obtain hadron-quark phase transition in neutron stars considering Maxwell construction. The structural properties of the resultant hybrid stars are computed for three different values of bag constant (B) in the range B 1/4 =(145-160 MeV). We study the effects of symmetry energy (J) on the hybrid star properties with the different KIDS model and found that J has important influence not only on the transition properties like the transition mass, transition radius and jump in density due to phase transition, but also on the stability of the hybrid stars. The vector repulsion of the quark phase via the parameter G V has profound influence in obtaining reasonable hybrid star configurations, consistent with the recent astrophysical constraints on the structural properties of compact stars. Within the aforesaid range of B, the value of G V is constrained to be 0.3 ≲ G V ≲ 0.4 in order to obtain reasonable hybrid star configurations.

    Keywords: nuclear density functional theory, neutron star, Hadron - quark phase transition, MIT bag model, symmetry energy

    Received: 23 Apr 2024; Accepted: 17 Jun 2024.

    Copyright: © 2024 Sen, Gil and Hyun. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Chang Ho Hyun, Daegu University, Gyeongsan, Republic of Korea

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