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We investigate the structural and observable impacts of dark matter (DM) on neutron stars using a combined equation of state that integrates the relativistic mean field (RMF) model for baryonic matter with a variable density profile for DM,…

High Energy Astrophysical Phenomena · Physics 2025-01-14 Ankit Kumar , Hajime Sotani

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

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

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

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

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

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

By assuming that only gravitation exists between dark matter (DM) and normal matter (NM), we study the effects of fermionic DM on the properties of neutron stars using the two-fluid Tolman-Oppenheimer-Volkoff formalism. It is found that the…

Solar and Stellar Astrophysics · Physics 2014-02-20 Qian-Fei Xiang , Wei-Zhou Jiang , Dong-Rui Zhang , Rong-Yao Yang

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

We investigate the impact of asymmetric fermionic dark matter (DM) on the thermal evolution of neutron stars (NSs), considering a scenario where DM interacts with baryonic matter (BM) through gravity. Employing the two-fluid formalism, our…

High Energy Astrophysical Phenomena · Physics 2024-03-15 Edoardo Giangrandi , Afonso Ávila , Violetta Sagun , Oleksii Ivanytskyi , Constança Providência

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

Due to their extreme density and low temperature, neutron stars (NS) are efficient probes to unveil interactions between standard model and dark matter (DM) particles. From elastic scatterings on NS material, DM can get gravitationally…

High Energy Physics - Phenomenology · Physics 2019-05-28 Raghuveer Garani , Yoann Genolini , Thomas Hambye

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

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

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

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

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

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 impact of dark matter (DM) on hybrid and twin stars within a two-fluid framework, where DM and normal matter interact only through gravity. A self-interacting fermionic DM model is considered, while for the nuclear and…

High Energy Astrophysical Phenomena · Physics 2026-05-28 H. C. Das
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