Effects of asymmetric dark matter on a magnetized neutron star: A two-fluid approach

Autor:	Routaray, Pinku, Parmar, Vishal, Das, H. C., Kumar, Bharat, Burgio, G. F., Schulze, H. -J.
Rok vydání:	2024
Předmět:	Nuclear Theory Astrophysics - High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology High Energy Physics - Phenomenology
Druh dokumentu:	Working Paper
Popis:	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, non-annihilating, asymmetric fermionic DM that couples to NSs only through gravitational interaction. Using the QMC-RMF4 relativistic mean-field model with density-dependent magnetic fields, we investigate the magnetized equation of state and examine the accumulation of DM under various conditions. Our results show that as the DM fraction increases, the maximum gravitational mass of the NS decreases, especially for heavier DM particles, while lighter DM particles can induce a transition from a dark core to a halo structure, increasing the maximum mass. Strong MFs soften the equation of state and reduce the dark mass a NS core can retain before transitioning to a halo. Comment: Comments are welcome
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2412.21097 Zobrazit plný text záznamu View this record from Arxiv