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A pure nucleonic equation of state (EoS) for beta equilibrated charge neutral neutron star (NS) matter is determined using density dependent effective NN interaction. This EoS is found to satisfy both the constraints from the observed…

Nuclear Theory · Physics 2011-05-11 Partha Roy Chowdhury

We present a systematic study of the properties of pure hadronic and hybrid compact stars. The nuclear equation of state (EoS) for beta-equilibrated neutron star matter was obtained using density dependent effective nucleon-nucleon…

Nuclear Theory · Physics 2015-03-19 Abhishek Mishra , Partha Roy Chowdhury , D. N. Basu

Pure hadronic compact stars, above a limiting value ($\approx$1.6 M$_\odot$) of their gravitational masses, to which predictions of most of other equations of state (EoSs) are restricted, can be reached from the equation of state (EoS)…

Nuclear Theory · Physics 2011-01-07 Partha Roy Chowdhury , Abhijit Bhattacharyya , D. N. Basu

We studied the properties of dark matter admixed-neutron stars (DMANS), considering fermionic dark matter (DM) that interacts gravitationally with hadronic matter (HM). Using relativistic mean-field equations of state (EoSs) for both…

High Energy Astrophysical Phenomena · Physics 2025-07-17 Payaswinee Arvikar , Sakshi Gautam , Anagh Venneti , Sarmistha Banik

An equation of state (EoS) for symmetric nuclear matter is constructed using the density dependent M3Y effective interaction and extended for isospin asymmetric nuclear matter. Theoretically obtained values of symmetric nuclear matter…

Nuclear Theory · Physics 2014-04-23 D. N. Basu , Partha Roy Chowdhury , Abhishek Mishra

By assuming that only gravitation acts between dark matter (DM) and normal matter (NM), we studied DM admixed neutron stars (DANSs) using the two-fluid TOV equations. The NM and DM of compact stars are simulated by the relativistic mean…

Cosmology and Nongalactic Astrophysics · Physics 2019-09-25 X. D. Wang , B. Qi , N. B. Zhang , S. Y. Wang

We investigate the effect of feeble interaction of dark matter (DM) with hadronic matter on the equation of state (EoS) and structural properties of neutron stars (NSs) in static conditions. For the purpose we adopt the effective chiral…

High Energy Physics - Phenomenology · Physics 2021-06-08 Debashree Sen , Atanu Guha

Within the relativistic mean-field model, we investigate the properties of dark matter (DM) admixed neutron stars, considering non-rotating objects made of isotropic matter. We adopt the IOPB-I hadronic equation of state (EOS) by assuming…

Nuclear Theory · Physics 2023-05-26 Pinku Routray , H. C. Das , Souhardya Sen , Bharat Kumar , Grigoris Panotopoulos , Tianqi Zhao

The properties of rotating neutron stars are investigated using eight equations of state (EOSs). We also study the relations between various observables corresponding to different angular velocities for all those EOSs. All of these EoSs…

High Energy Astrophysical Phenomena · Physics 2023-11-27 Bidisha Ghosh , Mehedi Kalam

In this work we investigate the properties of neutron stars admixed with selfinteracting scalar bosonic dark matter. The dark matter interaction is described by a generalized $\phi^n$ power-law potential. We perform a stability analysis of…

High Energy Astrophysical Phenomena · Physics 2024-12-11 Sarah Louisa Pitz , Jürgen Schaffner-Bielich

We study the hydrostatic equilibrium configuration of an admixture of degenerate dark matter and normal nuclear matter by using a general relativistic two-fluid formalism. We consider non- self-annihilating dark matter particles of mass ~ 1…

Cosmology and Nongalactic Astrophysics · Physics 2011-11-09 S. -C. Leung , M. -C. Chu , L. -M. Lin

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 propose a model of asymmetric bosonic dark matter (DM) with self-repulsion mediated by the vector field coupled to the complex scalar particles. By adopting the two-fluid formalism, we study different DM distribution regimes, either,…

High Energy Astrophysical Phenomena · Physics 2023-08-15 Edoardo Giangrandi , Violetta Sagun , Oleksii Ivanytskyi , Constança Providência , Tim Dietrich

The equation of state (EoS) of neutron matter plays a decisive role to understand the neutron star properties and the gravitational waves from neutron star mergers. At sufficient densities, the appearance of hyperons generally softens the…

Nuclear Theory · Physics 2025-02-21 Hui Tong , Serdar Elhatisari , Ulf-G. Meißner

The equation of state (EoS) for cold dense matter inside neutron stars is investigated by using holographic QCD models in the framework of the Einstein-Maxwell-dilaton (EMD) system and the improved Karch-Katz-Son-Stephanov (KKSS) action for…

Nuclear Theory · Physics 2022-12-14 Lin Zhang , Mei Huang

We present a comprehensive study of compact stars admixed with non-self annihilating self-interacting fermionic dark matter, delineating the dependence on the nuclear equation of state by considering the two limiting parametrized equations…

High Energy Astrophysical Phenomena · Physics 2025-05-16 Mikel F. Barbat , Jürgen Schaffner-Bielich , Laura Tolos

The existence of neutron stars with $2M_\odot$ requires the strong stiffness of the equation of state (EoS) of neutron-star matter. We introduce a multi-pomeron exchange potential (MPP) working universally among 3- and 4-baryons to stiffen…

Nuclear Theory · Physics 2017-12-27 Y. Yamamoto , H. Togashi , T. Tamagawa , T. Furumoto , N. Yasutake , Th. A. Rijken

We study the properties of non-rotating and rotating neutron stars for a new set of equations of state (EOSs) with different high density behaviour obtained using the extended field theoretical model. The high density behaviour for these…

Nuclear Theory · Physics 2008-11-26 Shashi K. Dhiman , Raj Kumar , B. K. Agrawal

We calculate total masses and radii of neutron stars (NS) for pure neutron matter and nuclear matter in beta-equilibrium. We apply a relativistic nuclear matter equation of state (EOS) derived from Dirac-Brueckner-Hartree-Fock (DBHF)…

Nuclear Theory · Physics 2009-11-11 Plamen G. Krastev , Francesca Sammarruca

Fuzzy dark matter (FDM), a practical alternative to cold dark matter, can exist in compact stars. Here, applying the FDM equation of state (EoS) constrained by CMB and large-scale structure data, we calculate the structure of relativistic…

High Energy Astrophysical Phenomena · Physics 2025-10-08 Zeinab Rezaei
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