1988-1991 photometry of the chromospherically active double-lined binary system HD 163621 = V835 Herculis

Details 1988-1991 photometry of the chromospherically active double-lined binary system HD 163621 = V835 Herculis 1988-1991 photometry of the chromospherically active double-lined binary system HD 163621 = V835 Herculis

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994japa...15..321h&link_type=abstract

Journal of Astrophysics and Astronomy (ISSN 0250-6335), vol. 15, no. 3, p. 321-328

Astronomy and Astrophysics

Astrophysics

2

Binary Stars, Starspots, Stellar Luminosity, Stellar Magnitude, Stellar Rotation, Variability, Chromosphere, Image Analysis, Light Curve, Stellar Spectrophotometry

Scientific paper

Photometry in V and B with a 16-inch automatic telescope from 1988 to 1991 confirms the synchronous rotation suspected earlier and reveals variability up to 0.1M in the B bandpass at one epoch. Five spots formed with lifetimes ranging from 0.15 to 0.77 years. As with other rapid rotators, the differential rotation coefficient (k = 0.03) is significantly smaller than that of the Sun (k = 0.19).

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