The Eclipsing Binary RU Eridani
| Autor: | Richard M. Williamon, James R. Sowell, Walter Van Hamme |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Publications of the Astronomical Society of the Pacific. 125:17-24 |
| ISSN: | 1538-3873 0004-6280 |
| Popis: | RU Eri is a near-contact eclipsing binary (V ≈ 9.24 magV) with a 0.632-day orbital period. The Wilson-Devinney program is used to simultaneously solve new UBVUBV light curves obtained between 1973 and 1981 at the Fernbank Science Center Observatory, together with existing single-lined radial velocity measurements. Light and velocity solution parameters, orbital elements, and absolute dimensions are presented. We find the more massive component to fill its Roche lobe completely, while the less massive star nearly fills its limiting lobe (98% by radius), making RU Eri a near-contact or broken-contact system. Thermal contact between the two stars is also broken, as indicated by the large temperature difference between the two components (≈1800 K). We present masses and radii for the two stars for a range of adopted masses for the primary component. The absolute dimensions imply a distance greater than 190 pc. New ephemerides are computed from published eclipse timings, including 13 new minima determined from our observations. |
| Databáze: | OpenAIRE |
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