Circularization in B-type eclipsing binaries in both Magellanic Clouds
| Autor: | P. North, J.-P. Zahn |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Physics
Metallicity Astronomy Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Radius Type (model theory) Surface gravity Space and Planetary Science Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Critical radius Astrophysics::Galaxy Astrophysics |
| Zdroj: | New Astronomy Reviews. 48:741-748 |
| ISSN: | 1387-6473 |
| DOI: | 10.1016/j.newar.2004.03.009 |
| Popis: | Making use of detached eclipsing binaries with B-type components discovered by the OGLE and MACHO teams in the SMC and in the LMC, we give the value of the fractional radius above which circularization occurs. This critical radius is around 0.24 to 0.26, regardless of the mass, surface gravity or metallicity, and is consistent with that found by Giuricin et al. (1984) for galactic binaries. These empirical facts are shown to be consistent with Zahn’s (1975) theory of tidal dissipation. This work confirms and extends that of North & Zahn (2003), thanks to a sample of 448 binaries taken from the recent OGLE catalogue of 2580 eclipsing binaries in the LMC (Wyrzykowski et al. 2003) and a more homogeneous interpretation of the lightcurves of the 148 SMC binaries. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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