Impact of Sub-MeV Dark Matter on the Cooling of Pulsating White Dwarfs

Abstract

In our galaxy, white dwarfs inevitably undergo scattering and capture processes with the interstellar diffuse dark matter. The captured dark matter forms a dark halo that eventually evaporates or annihilates. Theoretical pulsation modes and observations of pulsating white dwarfs provide predictions about their evolution. This motivates us to study the impact of sub-MeV interstellar dark matter on the cooling processes of white dwarfs. In this work, we consider the collisions between dark matter and relativistic degenerate electrons inside white dwarfs, numerically calculating the energy input and output results from scattering, capture, evaporation, and annihilation processes. Based on observational data from G117-B15, we conclude that the maximum cooling luminosity of the interstellar sub-MeV dark matter is approximately $10^{22}\text{erg}/\text{s}$, which is insufficient to provide an effective cooling mechanism for white dwarfs. Finally, if future observations detect a pulsating white dwarf in the Galactic center, the potential sensitivity of this scenario could extend to the region$10^{-3}\text{MeV}<m_{\chi }<10\text{MeV}$ and $6.02\times 10^{-38}{\text{cm}}^2>{\sigma }_0\ge 1.5\times 10^{40}{\text{cm}}^2$.

15 pages,8 figures

References in corpus (17)

• Estimating distances from parallaxes. V: Geometric and photogeometric distances to 1.47 billion stars in Gaia Early Data Release 3
• Pulsating White Dwarf Stars and Precision Asteroseismology
• Constraining Asymmetric Dark Matter through observations of compact stars
• The Dark Matter at the End of the Galaxy
• Improved Treatment of Dark Matter Capture in Neutron Stars
• New Analysis of Neutron Star Constraints on Asymmetric Dark Matter
• Celestial-Body Focused Dark Matter Annihilation Throughout the Galaxy
• Enhanced neutrino signals from dark matter annihilation in the Sun via metastable mediators
• Improved Treatment of Dark Matter Capture in White Dwarfs
• Bounds on Long-lived Dark Matter Mediators from Neutron Stars
• Solar reflection of light dark matter with heavy mediators
• Effect of electromagnetic dipole dark matter on energy transport in the solar interior
• Impact of galactic distributions in celestial capture of dark matter
• Milky Way White Dwarfs as Sub-GeV to Multi-TeV Dark Matter Detectors
• Probing Light Dark Matter through Cosmic-Ray Cooling in Active Galactic Nuclei
• The pulsating white dwarf G117-B15A: still the most stable optical clock known
• Optimal Celestial Bodies for Dark Matter Detection