Chromospherically active stars. V - HD 91816=LR Hya: A double-lined BY Draconis type binary

Details Chromospherically active stars. V - HD 91816=LR Hya: A double-lined BY Draconis type binary Chromospherically active stars. V - HD 91816=LR Hya: A double-lined BY Draconis type binary

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96.1426f&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 96, Oct. 1988, p. 1426-1430.

Astronomy and Astrophysics

Astronomy

12

Astronomical Photometry, Binary Stars, Dwarf Stars, Stellar Activity, Stellar Mass, Stellar Motions, Center Of Mass, Computer Programs, Eccentric Orbits, Stellar Magnitude

Scientific paper

Observations of HD 91816=LR Hya obtained between 1982 and 1988 show it to consist of two nearly identical K0 dwarfs and to have an orbital period of 6.866 days and an orbital eccentricity of 0.014 + or - 0.003. The results suggest that the system has an age equal to or greater than that of the Hyades cluster. A spectroscopic parallax of 0.027 is obtained, and individual minimum masses of 0.55 solar masses each are found, implying an inclination of 61 + or - 3 deg.

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