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Ultra-Short-Period Binary Systems in the OGLE Fields Toward the Galactic Bulge
- Source :
- Scopus-Elsevier, ResearcherID, Michał Krzysztof Szymański
- Publication Year :
- 2015
- Publisher :
- arXiv, 2015.
-
Abstract
- We present a sample of 242 ultra-short-period (P < 0.22 d) eclipsing and ellipsoidal binary stars identified in the OGLE fields toward the Galactic bulge. Based on the light curve morphology, we divide the sample into candidates for contact binaries and non-contact binaries. In the latter group we distinguish binary systems consisting of a cool main-sequence star and a B-type subdwarf (HW Vir stars) and candidates for cataclysmic variables, including five eclipsing dwarf novae. One of the detected eclipsing binary systems - OGLE-BLG-ECL-000066 - with the orbital period below 0.1 d, likely consists of M dwarfs in a nearly contact configuration. If confirmed, this would be the shortest-period M-dwarf binary system currently known. We discuss possible evolutionary mechanisms that could lead to the orbital period below 0.1 d in an M-dwarf binary.<br />25 pages, 11 figures, submitted to Acta Astronomica
- Subjects :
- Astrophysics - Solar and Stellar Astrophysics
Astrophysics::Solar and Stellar Astrophysics
FOS: Physical sciences
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics::Earth and Planetary Astrophysics
Astrophysics::Galaxy Astrophysics
Solar and Stellar Astrophysics (astro-ph.SR)
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Scopus-Elsevier, ResearcherID, Michał Krzysztof Szymański
- Accession number :
- edsair.doi.dedup.....d1b90114df9ecd80490ef3be24032750
- Full Text :
- https://doi.org/10.48550/arxiv.1503.02080