Photometry of HD 45088 - A new bright BY Draconis variable

Details Photometry of HD 45088 - A new bright BY Draconis variable Photometry of HD 45088 - A new bright BY Draconis variable

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pasp...93..504b&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 93, Aug.-Sept. 1981, p. 504-506.

Astronomy and Astrophysics

Astronomy

14

Chromosphere, Dwarf Stars, K Stars, Stellar Rotation, Stellar Spectrophotometry, Variable Stars, Binary Stars, Electrophotometry, Orbital Mechanics, Starspots, Stellar Motions

Scientific paper

The K-dwarf SB2 system HD 45088, predicted to be a BY Dra variable on the basis of its orbital period and emission-line characteristics, is found to be photometrically variable. The amplitude is significantly variable, having ranged between 0.02m during February-April 1980 to 0.045m during September-October 1980. The photometric period, shown to be 7.36 days, differs appreciably from the 6.99-day orbital period. Possible explanations for this difference are (1) nonsynchronization in a young binary, (2) spot development at high latitudes on a differentially rotating star, and (3) imperfect synchronization in a binary with an eccentric orbit.

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