HD 9770, a southern active-chromosphere system

HD 9770, a southern active-chromosphere system

The visual triple system HD 9770 (BB Scl) has been the subject of a four-year programme of UVB(RI)C photometry and Hαéchelle 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...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society 2001-07, Vol.325 (1), p.143-150
Hauptverfasser: Watson, L.C., Pritchard, J.D., Hearnshaw, J.B., Kilmartin, P.M., Gilmore, A.C.
Format: Artikel
Sprache:eng
Schlagworte:
binaries: eclipsing
line: formation
line: profiles
stars: activity
stars: chromospheres
stars: individual: HD 9770
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Zusammenfassung:The visual triple system HD 9770 (BB Scl) has been the subject of a four-year programme of UVB(RI)C photometry and Hαéchelle 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)C are presented.
ISSN:0035-8711
1365-2966
DOI:10.1046/j.1365-8711.2001.04404.x