HD 185151 - A new active-chromosphere binary

Details HD 185151 - A new active-chromosphere binary HD 185151 - A new active-chromosphere binary

Jul 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982aj.....87.1035b&link_type=abstract

Astronomical Journal, vol. 87, July 1982, p. 1035-1040. NsG-7543.

Astronomy and Astrophysics

Astronomy

17

Binary Stars, Chromosphere, Variable Stars, Astronomical Spectroscopy, Electrophotometry, Giant Stars, Light Curve, Line Spectra, Orbital Elements, Radial Velocity, Starspots, Stellar Rotation

Scientific paper

Spectroscopic and photometric observations of the K2III star HD 185151 are reported which establish it as a chromospherically active binary with an orbital period of 40.1 days. Reticon observation of the hydrogen alpha region shows a partially filled profile, owing presumably to chromospheric emission, as well as a blue emission wing extending out about 100 km/s. The light curve is effectively a double sine curve, and can be modeled by two starspots separated by almost exactly 180 deg in longitude.

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