Hydrogen-Atmosphere White Dwarfs Are Less Likely To Be Found with Wide-Binary Companions
Abstract
The fraction of white dwarfs found in wide binaries is estimated by cross referencing a catalogue of wide binaries with catalogues photometrically determined white-dwarf candidates and spectroscopically confirmed white dwarf stars. The wide-binary fraction of white dwarfs with hydrogen-dominated atmospheres is about 5%, but the fraction of white dwarfs with helium or carbon-dominated atmospheres is significantly larger. Using spectroscopic classifications, the binary fraction of DA white dwarfs is determined to be $0.063\pm0.002$ and for non-DA white dwarfs is larger at $0.080\pm0.004$.
- Publication:
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arXiv e-prints
- Pub Date:
- July 2024
- DOI:
- 10.48550/arXiv.2407.17634
- arXiv:
- arXiv:2407.17634
- Bibcode:
- 2024arXiv240717634H
- Keywords:
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- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 4 pages, 4 figures, submitted to Open Journal of Astrophysics