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Speed of Sound in Hybrid Stars and the Role of Bag Pressure in the Emergence of Special Points on M-R Variation of Hybrid Stars

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arxiv 2303.04653 v1 pith:ZEUCUXJQ submitted 2023-03-08 nucl-th hep-ph

Speed of Sound in Hybrid Stars and the Role of Bag Pressure in the Emergence of Special Points on M-R Variation of Hybrid Stars

classification nucl-th hep-ph
keywords modelhybriddifferentemergenceformsfourparameterspoints
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We compute the hybrid star (HS) properties with the help of Maxwell construction. For the purpose we choose a fixed hadronic model and four different forms of MIT bag model for the quark phase. We investigate thoroughly the effects of the different parameters of the bag model on the speed of sound in HS matter and the structural properties of HSs in the light of the various recent constraints on them from astrophysical observations. We also examine the importance of each parameter involved in these four forms of bag model in the context appearance of special points (SPs) in the mass-radius (M-R) variation of HSs. We find that among all these parameters the bag pressure play the most significant role in the emergence of the SPs in the M-R dependence of HSs.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Can average speed of sound and thermodynamic response functions signal the exotic phases in neutron star cores?

    nucl-th 2026-07 conditional novelty 5.0

    Average speed of sound, its logarithmic derivative, and thermodynamic response functions distinguish sharp-interface versus mixed-phase hadron-quark transitions inside hybrid neutron stars.

  2. Bayesian analysis of density profile of light dark matter elucidating the properties of dark matter admixed neutron stars in the presence of hyperons

    nucl-th 2026-05 unverdicted novelty 5.0

    Bayesian analysis finds that the likely ranges of light dark-matter fermion mass and exponential density-profile parameter in hyperon-containing neutron stars are nearly independent of the hadronic model for symmetry-...

  3. Characterizing the quark-hadron mixed phase in compact star cores : sensitivity to nuclear saturation and quark-model parameters at finite-temperature

    nucl-th 2026-05 unverdicted novelty 4.0

    The quark-hadron mixed phase width in hybrid stars is mainly controlled by effective nucleon mass and symmetry energy, with temperature reducing the width and softening the EOS while strong vector repulsion is needed ...