Dark Matter-admixed Rotating White Dwarfs as Peculiar Compact Objects
arXiv:2111.12894 · doi:10.3847/1538-4357/aca09b
Abstract
The discoveries of anomalous compact objects challenge our understanding of the standard theory of stellar structures and evolution. They serve as an excellent laboratory to search for new physics. Earlier studies on spherically symmetric dark matter-admixed compact stars could explain a handful of anomalies. In this paper, we investigate the observational signatures of dark matter (DM)-admixed rotating white dwarfs and make connections to observed peculiar white dwarfs. We compute the equilibrium structures of DM-admixed rotating white dwarfs using a self-consistent, two-fluid method, with the DM component being a non-rotating degenerate fermi gas. We find that the admixture of DM in rotating white dwarfs could: (1) account for some peculiar white dwarfs that do not follow their usual mass-radius relation, (2) allow the existence of stable, rapid-rotating white dwarfs that are free from thermonuclear runaway, which could explain some anomalous x-ray pulsars/soft gamma-ray repeaters, and (3) produce universal (moment of inertia)-Love (tidal Love number)- (quadrupole moment) relations that span bands above those without DM admixture, thus providing an indirect way to search for DM in white dwarfs through gravitational-wave detection. DM-admixed rotating white dwarfs can account for some peculiar compact objects. Our results suggest a systematic approach to account for unusual compact objects that could be discovered by upcoming surveys.
Accepted for publications. 18 pages, 11 figures
References in corpus (25)
- Modules for Experiments in Stellar Astrophysics (MESA)
- Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective Boundaries, and Energy Conservation
- Tidal Love numbers of neutron stars
- Constraining neutron star tidal Love numbers with gravitational wave detectors
- Constraining Asymmetric Dark Matter through observations of compact stars
- Constraining the Galaxy's dark halo with RAVE stars
- Compact stars made of fermionic dark matter
- Constraints on Bosonic Dark Matter From Observations of Old Neutron Stars
- Detecting Dark Matter with Imploding Pulsars in the Galactic Center
- Fusion reactions in multicomponent dense matter
- A highly magnetised and rapidly rotating white dwarf as small as the Moon
- Polarimetric evidence of a white dwarf pulsar in the binary system AR Scorpii
- Dark matter admixed neutron star as a possible compact component in the GW190814 merger event
- Precise Atmospheric Parameters for the Shortest Period Binary White Dwarfs: Gravitational Waves, Metals, and Pulsations
- Tidal Deformability of Dark Matter Admixed Neutron Stars
- Study of Dark-Matter Admixed Neutron Stars using the Equation of State from the Rotational Curves of Galaxies
- On the evolution of rotating accreting white dwarfs and type Ia supernovae
- Can the GW190814 secondary component be a bosonic dark matter admixed compact star?
- Measuring Individual Masses of Binary White Dwarfs with Space-based Gravitational-wave Interferometers
- Phenomenological constraints on accretion of non-annihilating dark matter on the PSR B1257+12 pulsar from orbital dynamics of its planets
- Tidal Love numbers and moment-Love relations of polytropic stars
- I-Love-Q Relations for Realistic White Dwarfs
- Effects of dark matter in star formation
- Does Dark Matter admixed pulsar exist ?
- Searching for Anomalies in the ZTF Catalog of Periodic Variable Stars