HD 9770, a southern active-chromosphere system

Authors
Watson, LC Pritchard, JD Hearnshaw, JB Kilmartin, PM Gilmore, AC
Citation
Lc. Watson et al., HD 9770, a southern active-chromosphere system, M NOT R AST, 325(1), 2001, pp. 143-150
Citations number
35
Categorie Soggetti
Space Sciences
Journal title
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN journal
00358711 → ACNP
Volume
325
Issue
1
Year of publication
2001
Pages
143 - 150
Database
ISI
SICI code
0035-8711(20010721)325:1<143:H9ASAS>2.0.ZU;2-W
Abstract
The visual triple system HD 9770 (BB Scl) has been the subject of a four-ye ar programme of UVB(RI)(C) photometry and H alpha echelle spectroscopy. Ana lysis 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 KIV star, wh ich may be in a binary system with another K dwarf. The B system is an ecli psing binary of the BY Dra type in which both stars are chromospherically a ctive. 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 ligh t curves in UBV(RI)(C) are presented.