Physical properties of active stars and stellar systems |
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| Authors: | R AOsten S HSaar |
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| Institution: | Harvard-Smithsonian Center for Astrophysics, MS 58, 60 Garden Street, Cambridge, MA 02138, USA; Center for Astrophysics and Space Astronomy, Campus Box 389, Boulder, CO 80309, USA |
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| Abstract: | We study spectra of 18 active stars and stellar systems, drawn from lists of known active binaries or newly discovered extreme-ultraviolet and soft X-ray sources. Using spectral synthesis and template modelling, we measure (often for the first time) a variety of physical properties of the stars, including spectral types, luminosities and v sin i values. We report direct observation of previously undetected secondary components in three systems, and refine the orbital elements for two of these (HR 7275 and HD 217344). |
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| Keywords: | stars: activity binaries: general stars: fundamental parameters stars: late-type stars: rotation |
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