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The southern active-chromosphere star HD 6628 |
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| Authors: | L. C. Watson J. B. Hearnshaw K. R. Pollard P. M. Kilmartin A. C. Gilmore |
| Affiliation: | Mount John University Observatory and Dept of Physics &Astronomy, University of Canterbury, Private Bag 4800, Christchurch, New Zealand |
| Abstract: | The star HD 6628, heretofore classified as a G5 subgiant, is shown to be a chromospherically active single-lined spectroscopic binary with a period of 27.332±0.008 d. From high-resolution spectra, the system is found to consist of a late F-type dwarf and an active G8–K1 bright subgiant, the latter having a rotation period of not more than 14.8±3.8 d derived from the width of metal lines. Further stellar and orbital parameters are derived and presented. |
| Keywords: | line: formation line: profiles stars: activity binaries: spectroscopic stars: chromospheres stars: individual: HD 6628 |