Work

Cooling of dark neutron stars

Year: 2025

Type: article

Abstract: We study the cooling of isolated dark-matter-admixed neutron stars, employing a realistic nuclear equation of state and realistic nuclear pairing gaps, together with fermionic dark matter of variable particle mass and dark-matter fraction. The related parameter space is scanned for the stellar structural and cooling properties. We find that a consistent description of all current cooling data requires fast direct Urca cooling and reasonable proton 1S0 gaps. Dark matter affects the cooling properties by a modification of the nuclear density profiles, but also changes stellar radius and maximum mass. Possible signals of a large dark matter content could be a very massive but slow-cooling star or a very light but fast-cooling star.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/nzq6-llbf

Authors: B. X. Zhou, H. C. Das, J. B. Wei, G. F. Burgio, Z. H. Li, H.-J. Schulze

Institutions: Fudan University, University of Catania, Istituto Nazionale di Fisica Nucleare, Sezione di Catania, China University of Geosciences

Language: English

Topic: Pulsars and Gravitational Waves Research

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, National Key Research and Development Program of China

Awards: G2348984634, G3030300266, G5130183477, G8342651065