Accretion of Dark Matter in Neutron Stars

Razeira, M.; Mesquita, Alexandre; Vasconcellos, C. A. Z.; Gomes, Renata Nascimento

doi:10.1142/s0218301311040670

Cited by 7 publications

(5 citation statements)

References 7 publications

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“…Among the indirect methods to study dark matter, stands out its effects on the structure of compact stars and particularly on quark and strange stars. The extremely high pressure on these stars may compact its material content into exotic particles and increase this way the probability of dark matter capture within the star, a strongly model-dependent event (Razeira et al 2011), eventually resulting in gravitational trapping (Xiang et al 2014). This conception requires dark matter to be made of some form of stable, long-living, or non-annihilating particles that can accumulate inside the star (Sandin & Ciarcelluti 2009).…”

Section: Strange and Dark Mattermentioning

confidence: 99%

Equation of state of strange stars with admissible dark matter: Derivation from galactic rotational curves

et al. 2021

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Compact stars consisting of strange quark matter and strange matter with admissible dark matter are studied by solving the Tolman-Oppenheimer-Volkoff equations for two fluids interacting only by gravity, with the dark-matter EoS obtained by means of galaxy rotation curves. The properties of these stars are explored by means of the modeling of their mass-radius relations and gravitational redshifts.

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Section: Strange and Dark Mattermentioning

confidence: 99%

Equation of state of strange stars with admissible dark matter: Derivation from galactic rotational curves

et al. 2021

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“…Particularly for the Milky Way galaxy, r s = 20 kpc and ρ s = 0.26 GeV/c.c. [79] . This article aims to investigate the possible existence of dark-matter-admixed pulsars, namely, PSR J0045-7319, PSR J0537-6910, which are located in the disk region of the Milky Way galaxy.…”

Section: Introductionmentioning

confidence: 99%

PossibleExistence of Dark-Matter-Admixed Pulsar in the Disk Region of the Milky Way Galaxy

et al. 2022

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In our previous study, (Eur Phys J Plus 135:362, 2020 & Eur Phys J Plus 135:637, 2020), we have discussed the possible existence of the dark-matter-admixed pulsars, located in dwarf as well as in massive spiral galaxies (based on Singular Isothermal Sphere dark-matter density profile) and in the Milky Way galaxy (based on Universal Rotational Curve dark-matter density profile). In this article, we use the Navarro–Frenk–White (NFW) dark-matter density profile to get analogous results for the pulsars in the disk region of the Milky Way galaxy. These findings may be treated as valuable complements to the previous findings. We conclude from our findings that there is a unique possibility of the presence of dark-matter-admixed pulsars in all the regions of the galaxies.

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“…Two major possible ways to explain the possible existence of DM in NSs are that the trapped DM during the supernova (SN) explosion may be inherited by NSs or the later may also accrete DM in its later stages [43][44][45][46][47]. We consider the second possibility in the present work.…”

Section: Introductionmentioning

confidence: 99%

Feeble DM-SM interaction via new scalar and vector mediators in rotating neutron stars

Guha

Sen

2021

J. Cosmol. Astropart. Phys.

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We investigate the possible presence of dark matter (DM) in massive and rotating neutron stars (NSs). For the purpose we extend our previous work [1] to introduce a light new physics vector mediator besides a scalar one in order to ensure feeble interaction between fermionic DM and β stable hadronic matter in NSs. The chosen masses of DM fermion and the mediators and the couplings are consistent with the self-interaction constraint from Bullet cluster and from present day relic abundance. Assuming that both the scalar and vector mediators contribute equally to the relic abundance, we compute the equation of state (EoS) of the DM admixed NSs to find that the present consideration of the vector new physics mediator do not bring any significant change to the EoS and static NS properties of DM admixed NSs compared to the case where only the scalar mediator was considered [1]. However, the obtained structural properties in static conditions are in good agreement with the various constraints on them from massive pulsars like PSR J0348+0432 and PSR J0740+6620, the gravitational wave (GW170817) data and the recently obtained results of NICER experiments for PSR J0030+0451 and PSR J0740+6620. We also extend our work to compute the rotational properties of DM admixed NSs rotating at different angular velocities. The present results in this regard suggest that the secondary component of GW190814 may be a rapidly rotating massive DM admixed NS. The constraints on rotational frequency from pulsars like PSR B1937+21 and PSR J1748-2446ad are also satisfied

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Accretion of Dark Matter in Neutron Stars

Cited by 7 publications

References 7 publications

Equation of state of strange stars with admissible dark matter: Derivation from galactic rotational curves

Equation of state of strange stars with admissible dark matter: Derivation from galactic rotational curves

PossibleExistence of Dark-Matter-Admixed Pulsar in the Disk Region of the Milky Way Galaxy

Feeble DM-SM interaction via new scalar and vector mediators in rotating neutron stars

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