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This thesis explores the effects of dark matter (DM) on neutron stars (NSs) using the relativistic mean-field (RMF) model. The effects of DM on NS properties, including the mass-radius relation, the moment of inertia, and tidal…

Nuclear Theory · Physics 2023-05-04 H. C. Das

We investigate the influence of ideal Fermi gas dark matter on the observable properties of neutron stars (NSs). Our analysis considers dark matter (DM) particle masses ($\mu$) ranging from $0.2$ GeV to $1$ GeV and various DM mass fractions…

General Relativity and Quantum Cosmology · Physics 2026-03-24 Monmoy Molla , Masum Murshid , Mehedi Kalam

We study the interaction between dark matter (DM) and highly magnetized neutron stars (NSs), focusing on how DM particle mass, mass fraction, and magnetic field (MF) strength affect NS structure and stability. We consider self-interacting,…

Nuclear Theory · Physics 2025-06-04 Pinku Routaray , Vishal Parmar , H. C. Das , Bharat Kumar , G. F. Burgio , H. -J. Schulze

We investigate the effects of dark matter (DM) on neutron star (NS) properties using the neutron decay anomaly model within the relativistic mean-field (RMF) framework. Three nucleonic models (HCD0-HCD2) are developed, satisfying…

High Energy Astrophysical Phenomena · Physics 2025-05-15 H. C. Das , G. F. Burgio

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 presence of dark matter (DM) within neutron stars (NSs) can be introduced by different accumulation scenarios in which DM and baryonic matter (BM) may interact only through the gravitational force. In this work, we consider asymmetric…

High Energy Astrophysical Phenomena · Physics 2024-03-05 Davood Rafiei Karkevandi , Mahboubeh Shahrbaf , Soroush Shakeri , Stefan Typel

The neutron star properties are generally determined by the equation of state of $\beta$-equilibrated dense matter. In this work, we consider the interaction of fermionic dark matter (DM) particles with the nucleons via Higgs exchange and…

High Energy Astrophysical Phenomena · Physics 2022-01-19 H. C. Das , Ankit Kumar , Bharat Kumar , S. K. Patra

The effects of dark matter (DM) on the curvatures of the neutron star (NS) are examined by using the stiff and soft relativistic mean-field equation of states. The curvatures of the NSs are calculated with the variation of baryon density.…

Nuclear Theory · Physics 2021-11-29 H. C. Das , Ankit Kumar , Bharat Kumar , S. K. Biswal , S. K. Patra

We investigate the impact of dark matter on neutron star properties using the relativistic mean-field theory. By incorporating the dark matter model, we explore how dark matter parameters, specifically dark matter mass and Fermi momentum,…

High Energy Astrophysical Phenomena · Physics 2024-08-29 Ankit Kumar , Hajime Sotani

In this study, we investigate the impact of dark matter (DM) on neutron stars (NSs) using a two-fluid formalism that treats nuclear matter (NM) and DM as gravitationally coupled components. Employing NM equations of state spanning a wide…

High Energy Astrophysical Phenomena · Physics 2025-10-13 Ankit Kumar , Sudhakantha Girmohanta , Hajime Sotani

In this study, we investigate the impacts of dark matter (DM) on the properties of both static and rotating neutron stars utilizing a self-interacting DM model, motivated by the neutron decay anomaly. DM-admixed NSs are modeled by assuming…

High Energy Astrophysical Phenomena · Physics 2025-09-15 Pinku Routaray , Abirbhav Chakrawarty , N. K. Patra , Bharat Kumar

The effect of dark matter (DM) on $f$-mode oscillations in DM admixed neutron stars (NSs) is investigated in a comprehensive analysis with particular attention to the role of the nuclear equation of state. Hadronic matter is modeled by the…

General Relativity and Quantum Cosmology · Physics 2024-12-23 Swarnim Shirke , Bikram Keshari Pradhan , Debarati Chatterjee , Laura Sagunski , Jürgen Schaffner-Bielich

The presence of Dark matter (DM) within a neutron star (NS) can substantially influence the macroscopic properties. It is commonly assumed that the pressure inside an NS is isotropic, but in reality, pressure is locally anisotropic. This…

Cosmology and Nongalactic Astrophysics · Physics 2025-12-12 Premachand Mahapatra , Chiranjeeb Singha , Ayush Hazarika , Prasanta Kumar Das

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

Over the past two decades, significant strides have been made in the study of Dark Matter (DM) admixed neutron stars and their associated properties. However, an intriguing facet regarding the effect of DM on magnetized neutron stars still…

High Energy Astrophysical Phenomena · Physics 2023-10-04 Vishal Parmar , H. C. Das , M. K. Sharma , S. K. Patra

We study the impact of symmetry energy ($S$), hyperons, and dark matter (DM) on structural and oscillatory properties of neutron stars (NSs). Uncertainty from hadronic equation of state for NSs is considered with 15 relativistic mean field…

Nuclear Theory · Physics 2026-05-15 Debashree Sen , Atanu Guha , Chang Ho Hyun

We study an impact of self-interacting bosonic dark matter (DM) on various observable properties of neutron stars (NSs). The analysis is performed for asymmetric DM with masses from few MeV to GeV, the self-coupling constant of order…

High Energy Astrophysical Phenomena · Physics 2022-01-05 Davood Rafiei Karkevandi , Soroush Shakeri , Violetta Sagun , Oleksii Ivanytskyi

We investigate the effects of dark matter (DM) on the nuclear equation of state (EoS) and neutron star structure, in the relativistic mean field theory, both in the absence and presence of a crust. The $\sigma-\omega$ model is modified by…

Nuclear Theory · Physics 2023-02-22 Adrian G. Abac , Christopher C. Bernido , Jose Perico H. Esguerra

We study the impact of asymmetric bosonic dark matter on neutron star properties, including possible changes of tidal deformability, maximum mass, radius, and matter distribution inside the star. The conditions at which dark matter…

High Energy Astrophysical Phenomena · Physics 2023-01-11 Violetta Sagun , Edoardo Giangrandi , Oleksii Ivanytskyi , Costança Providência , Tim Dietrich

We study possible effects of a dark matter (DM) core on the maximum mass of a neutron star (NS), on the mass-radius relation and on the NS tidal deformability parameter $\Lambda$. We show that all these quantities would in general be…

Cosmology and Nongalactic Astrophysics · Physics 2018-06-20 John Ellis , Gert Hütsi , Kristjan Kannike , Luca Marzola , Martti Raidal , Ville Vaskonen
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