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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 study the effect of asymmetric fermionic dark matter (DM) on the thermal evolution of neutron stars (NSs). No interaction between DM and baryonic matter is assumed, except the gravitational one. Using the two-fluid formalism, we show…

High Energy Astrophysical Phenomena · Physics 2024-03-08 Afonso Ávila , Edoardo Giangrandi , Violetta Sagun , Oleksii Ivanytskyi , Constança Providência

Neutron stars (NSs) provide a unique laboratory to probe dark matter (DM) through its gravitational imprint on stellar evolution. We use a two-fluid framework with non-annihilating, asymmetric DM, both fermionic and bosonic, that interacts…

High Energy Astrophysical Phenomena · Physics 2026-04-16 Adamu Issifu , Prashant Thakur , Davood Rafiei Karkevandi , Franciele M. da Silva , Débora P. Menezes , Y. Lim , Tobias Frederico

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

This work investigates the impact of dark matter (DM) on the microscopic and macroscopic properties of proto-neutron stars (PNSs). We employ a single-fluid framework in which DM interacts with ordinary matter (OM) via the Higgs portal and…

High Energy Astrophysical Phenomena · Physics 2025-10-23 Adamu Issifu , Débora P. Menezes , Tobias Frederico

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

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 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

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

If dark matter (DM) exists in halos around rotating neutron stars (NSs), it will be essential to understand the effects of rotation on the distribution of DM and baryonic matter (BM) in the stars to interpret observations. In this work, we…

High Energy Astrophysical Phenomena · Physics 2026-04-03 Shafayat Shawqi , Andreas Konstantinou , Sharon M. Morsink

Millisecond pulsars, representing the older neutron star population, are believed to have undergone a prolonged period of dark matter accumulation, resulting in a higher dark matter content. Their extreme rotation makes them unique…

High Energy Astrophysical Phenomena · Physics 2025-06-27 Lorenzo Cipriani , Edoardo Giangrandi , Violetta Sagun , Daniela D. Doneva , Stoytcho S. Yazadjiev

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

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

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

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

Neutron Stars (NSs), among the densest objects in the Universe, are exceptional laboratories for investigating Dark Matter (DM) properties. Recent theoretical and observational developments have heightened interest in exploring the impact…

High Energy Astrophysical Phenomena · Physics 2026-01-21 Francesco Grippa , Gaetano Lambiase , Tanmay Kumar Poddar

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 how simultaneous mass and radius measurements of massive neutron stars (NSs) can help constrain properties of dark matter (DM) possibly admixed in them. Within a fermionic DM model that interacts only through gravitation,…

High Energy Astrophysical Phenomena · Physics 2025-10-07 Nai-Bo Zhang , Bao-An Li , Jia-Yu Zhang , Wei-Na Shen , Hui Zhang

We consider the effect of density dependent dark matter on the neutron star mass, radius, and tidal deformability. Nuclear matter (normal matter) as well as the fermionic dark matter sector is considered in a mean field model. We adopt the…

Nuclear Theory · Physics 2020-11-04 Arpan Das , Tuhin Malik , Alekha C. Nayak
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