Exploring robust correlations between fermionic dark matter model parameters and neutron star properties: A two-fluid perspective

Thakur, Prashant; Malik, Tuhin; Das, Arpan; Jha, T. K.; Providência, Constança

doi:10.1103/physrevd.109.043030

Cited by 10 publications

(1 citation statement)

References 74 publications

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“…Considerable work has been devoted to exploring the structure of nonrotating DMANSs. For instance, DMANSs have been constructed using mirror baryonic DM (Sandin & Ciarcelluti 2009), nonannihilating DM particles (Ciarcelluti & Sandin 2011;Leung et al 2011), self-interacting fermionic asymmetric DM (Goldman et al 2013;Kouvaris & Nielsen 2015;Mukhopadhyay et al 2017;Miao et al 2022), fermionic DM particles (interacting with each other by exchanging mesons; Xiang et al 2014;Thakur et al 2024), fermionic DM particles (interacting with each other by exchanging Standard Model Higgs bosons) (Panotopoulos & Lopes 2017), bosonic DMANSs (Rafiei Karkevandi et al 2022;Shakeri & Karkevandi 2024), light DM (Motta et al 2018), and a DM EOS that is obtained from the rotational curves of galaxies (Rezaei 2017).…”

Section: Introductionmentioning

confidence: 99%

The Effect of a Dark Matter Core on the Structure of a Rotating Neutron Star

Konstantinou

2024

ApJ

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Neutron stars represent unique laboratories, offering insights into the physics of supranuclear-density matter and serving as potential hosts for dark matter. This study explores the impact of dark matter cores on rapidly rotating neutron stars through the two-fluid approximation, assuming minimal interaction between baryonic matter and dark matter. The investigation employs phenomenological models for fermionic and bosonic dark matter, revealing that universal relations governing mass and radius changes due to rotation remain largely unaffected in the presence of a dark matter core. Specifically, for a 5% dark matter mass fraction, the percent deviations in total mass (M tot), the baryonic equatorial radius (R Be), and polar-to-equatorial baryonic radius ratio (R ratioB) are within 3.9%, 1.8%, and 1.4%, respectively. These findings suggest that the universal relations governing neutron star shape can be utilized to infer constraints on the properties of dark matter cores even in cases where the dark matter significantly softens the neutron star’s equation of state.

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Section: Introductionmentioning

confidence: 99%

The Effect of a Dark Matter Core on the Structure of a Rotating Neutron Star

Konstantinou

2024

ApJ

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Color-flavor locked strange stars admixed with mirror dark matter and the observations of compact stars

Yang,

2024

J. Cosmol. Astropart. Phys.

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We investigate the structure and the tidal deformability of the color-flavor locked strange stars admixed with mirror dark matter. Assuming the stars in the GW170817 event have a mirror-dark-matter core or a mirror-dark-matter halo, the observations of the central compact object within the supernova remnant HESS J1731-347 and the compact objects in the GW190814 and GW170817 events could be explained simultaneously with a pairing gap much smaller than 200 MeV. In contrast, a pairing gap larger than about 200 MeV must be employed without the consideration of a mirror-dark-matter core (halo). More importantly, we find that for the case of the quartic coefficient a 4 < 0.589, if the mass fraction of the mirror dark matter (fD ) of the compact stars in GW170817 is in a certain range (eg., 22.8% < fD < 77.2% for a 4 = 0.55), the minimum allowed value of the pairing gap could be less than 46.5 MeV (i.e., one half of the value of the strange quark mass which is taken as 93 MeV in this paper), which leads to the result that all astrophysical observations mentioned above could be satisfied without violating the conformal bound or the recently proposed positive trace anomally bound.

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Parametrized post-Tolman-Oppenheimer-Volkoff framework for screened modified gravity with an application to the secondary component of GW190814

Reyes,

Sakstein

2024

Phys. Rev. D

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Exploring robust correlations between fermionic dark matter model parameters and neutron star properties: A two-fluid perspective

Cited by 10 publications

References 74 publications

The Effect of a Dark Matter Core on the Structure of a Rotating Neutron Star

The Effect of a Dark Matter Core on the Structure of a Rotating Neutron Star

Color-flavor locked strange stars admixed with mirror dark matter and the observations of compact stars

Parametrized post-Tolman-Oppenheimer-Volkoff framework for screened modified gravity with an application to the secondary component of GW190814

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