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Related papers: Radial oscillations of quark stars admixed with da…

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Compact stars consisting of massless quark matter and fermionic dark matter are studied by solving the Tolman-Oppenheimer-Volkoff equations for two fluids separately. Dark matter is further investigated by incorporating inter-fermionic…

High Energy Astrophysical Phenomena · Physics 2016-04-27 Payel Mukhopadhyay , Juregen Schaffner-Bielich

Dark matter admixed neutron stars provide a promising avenue for observationally probing the dark matter characteristic. In this study, we examine non-radial oscillations in neutron stars containing self-interacting dark matter, which…

High Energy Astrophysical Phenomena · Physics 2026-02-24 Hajime Sotani , Ankit Kumar

Neutron stars could contain a mixture of ordinary nuclear matter and dark matter, such that dark matter could influence observable properties of the star, such as its mass and radius. We study these dark matter admixed neutron stars for two…

General Relativity and Quantum Cosmology · Physics 2021-11-09 Ben Kain

We discuss strange stars admixed with fermionic dark matter in the presence of a strong magnetic field using the two-fluid Tolman-Oppenheimer-Volkov equations. We describe strange quark matter using the MIT bag model and consider magnetic…

High Energy Physics - Phenomenology · Physics 2023-04-11 Osvaldo Ferreira , Eduardo S. Fraga

We study r-mode instability of rotating compact objects composed of asymmetric and self-interacting Fermionic dark matter (dark stars). It is argued that the instability limit the angular frequency of the stars less than half of the…

High Energy Astrophysical Phenomena · Physics 2020-11-17 Shin'ichirou Yoshida

We compute the 20 lowest frequency radial oscillation modes of strange stars admixed with condensed dark matter. We assume a self-interacting bosonic dark matter, and we model dark matter inside the star as a Bose-Einstein condensate. In…

General Relativity and Quantum Cosmology · Physics 2017-11-22 Grigoris Panotopoulos , Ilidio Lopes

In this work, we study dark matter (DM) admixed strange quark stars exploring the different possibilities about the nature of the DM and their effects on the macroscopic properties of strange stars, such as maximum masses, radii, as well…

High Energy Astrophysical Phenomena · Physics 2023-05-22 Luiz L. Lopes , H. C. Das

We investigate the dynamical behavior of strange quark matter (SQM) objects, such as stars and planets, when subjected to radial oscillations induced by tidal interactions in stellar systems. Our study demonstrates that SQM objects can…

High Energy Astrophysical Phenomena · Physics 2025-07-16 Joanna Jałocha , Łukasz Bratek

We study rotating compact stars that are mixtures of the ordinary nuclear matter in a neutron star and fermionic dark matter. After deriving equations describing a slowly rotating system made up of an arbitrary number of perfect fluids, we…

General Relativity and Quantum Cosmology · Physics 2023-11-15 John Cronin , Xinyang Zhang , Ben Kain

We investigate compact objects formed by dark matter admixed with ordinary matter made of neutron star matter and white dwarf material. We consider non-self annihilating dark matter with an equation-of-state given by an interacting Fermi…

High Energy Astrophysical Phenomena · Physics 2022-02-21 Laura Tolos , Juergen Schaffner-Bielich , Yannick Dengler

Compact stars consisting of fermions with arbitrary masses and interaction strengths are studied by solving the structure equation of general relativity, the Tolman-Oppenheimer-Volkoff equations. Scaling solutions are derived for a free and…

Astrophysics · Physics 2008-11-26 Gaurav Narain , Jurgen Schaffner-Bielich , Igor N. Mishustin

In this paper we study radial oscillations of rotating strange stars in strong magnetic fields in the Density Dependent Quark Mass (DDQM) model. We see that increase of frequency i.e. difference in frequency of rotating and non-rotating…

Astrophysics · Physics 2007-05-23 S. Singh , N. Chandrika Devi , V. K. Gupta , Asha Gupta , J. D. Anand

Dark matter is hypothesized to interact with ordinary matter solely through gravity and may be present in compact objects such as strange quark stars. We treat strange quark stars admixed with dark matter as two-fluid systems to investigate…

High Energy Astrophysical Phenomena · Physics 2025-04-22 Yida Yang , Chen Wu , Ji-Feng Yang

Because of their extreme densities and consequently, gravitational potential, compact objects such as neutron stars can prove to be excellent captors of dark matter particles. Considering purely gravitational interactions between dark and…

High Energy Astrophysical Phenomena · Physics 2025-01-22 Pratik Thakur , Anil Kumar , Vivek Baruah Thapa , Vishal Parmar , Monika Sinha

Compact relativistic stars allow us to study the nature of matter under extreme conditions, probing regions of parameter space that are otherwise inaccessible. Nuclear theory in this regime is not well constrained: one key issue is whether…

Astrophysics · Physics 2008-11-26 Anna L. Watts , Sanjay Reddy

Massive neutron stars may harbor deconfined quark matter in their cores. I review some recent work on the microphysics and the phenomenology of compact stars with cores made of quark matter. This includes the equilibrium and stability of…

Solar and Stellar Astrophysics · Physics 2014-11-20 Armen Sedrakian

Theoretical models of self-interacting dark matter offer a promising solution to several unresolved issues within the collisionless cold dark matter framework. For asymmetric dark matter, these self-interactions may encourage gravitational…

General Relativity and Quantum Cosmology · Physics 2025-01-31 Mariachiara Celato , Christian J. Krüger , Kostas D. Kokkotas

The generic properties of compact objects made of two different fluids of dark matter are studied in a scale invariant approach. We investigate compact objects with a core-shell structure, where the two fluids are separated, and with mixed…

General Relativity and Quantum Cosmology · Physics 2023-03-01 Marie Cassing , Alexander Brisebois , Muhammad Azeem , Jürgen Schaffner-Bielich

In [Leung et al., Phys. Rev. D 84, 107301 (2011)], we presented our results on using a general relativistic two-fluid formalism to study the hydrostatic equilibrium configuration of an admixture of degenerate dark matter and normal nuclear…

Cosmology and Nongalactic Astrophysics · Physics 2012-06-04 S. -C. Leung , M. -C. Chu , L. -M. Lin

Utilizing an equivparticle model with both linear confinement and leading-order perturbative interactions, we obtain systematically the properties of strangelets and nonstrange quark matter ($ud$QM) nuggets at various baryon ($A$) and…

High Energy Physics - Phenomenology · Physics 2024-10-01 Hao-Song You , Hao Sun , Hong-Bo Li , Cheng-Jun Xia , Ren-Xin Xu
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