| Autor: |
Watson, L.C., Pritchard, J.D., Hearnshaw, J.B., Kilmartin, P.M., Gilmore, A.C. |
| Předmět: |
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| Zdroj: |
Monthly Notices of the Royal Astronomical Society; 7/21/2001, Vol. 325 Issue 1, p143-150, 8p |
| Abstrakt: |
The visual triple system HD 9770 (BB Scl) has been the subject of a four-year programme of UVB(RI)[sub C] photometry and Hα échelle spectroscopy. Analysis of the data obtained over that period shows that star B, and probably also star A, of HD 9770 is a binary. The A system comprises a K1V star, which may be in a binary system with another K dwarf. The B system is an eclipsing binary of the BY Dra type in which both stars are chromospherically active. An orbital period of 0.476 525±0.000 013 d has been derived from the light curve in V. Physical parameters derived from analysis of the light curves in UBV(RI)[sub C] are presented. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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