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2001MNRAS.325..143W - Mon. Not. R. Astron. Soc., 325, 143-150 (2001/July-3)
HD 9770, a southern active-chromosphere system.
WATSON L.C., PRITCHARD J.D., HEARNSHAW J.B., KILMARTIN P.M. and GILMORE A.C.
Abstract (from CDS):
The visual triple system HD9770 (BB Scl) has been the subject of a four-year programme of UVB(RI)C photometry and Hα échelle spectroscopy. Analysis of the data obtained over that period shows that star B, and probably also star A, of HD9770 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 0.476525±0.000013d has been derived from the light curve in V. Physical parameters derived from analysis of the light curves in UBV(RI)C are presented.
Abstract Copyright: The Royal Astronomical Society
Journal keyword(s): line: formation - line: profiles - stars: activity - binaries: eclipsing - stars: chromospheres - stars: individual: HD9770
Simbad objects: 11
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