Photometric variability in chromospherically active stars. III - The binary stars

Abstract

view Abstract Citations (130) References (155) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Photometric Variability in Chromospherically Active Stars. III. The Binary Stars Strassmeier, Klaus G. ; Hall, Douglas S. ; Boyd, Louis J. ; Genet, Russell M. Abstract Differential UBV photometry of 49 late-type chromospherically active binary stars has been obtained. A total of 12,353 differential UBV magnitudes have been acquired and are used to determine seasonal photometric periods, amplitudes, mean brightnesses, maximum spot amplitudes, 'unspotted' differential magnitudes, and times of minimum light. Standard Fourier techniques are used to investigate the cause of the light variability. Eight stars are found which exhibit light variations due not to spot activity but rather to ellipticity and/or reflection effect. Others show combinations of all three effects. Some of the systems also show substantial differences between their rotational and orbital period. Publication: The Astrophysical Journal Supplement Series Pub Date: January 1989 DOI: 10.1086/191310 Bibcode: 1989ApJS...69..141S Keywords: Astronomical Photometry; Binary Stars; Chromosphere; Stellar Activity; Ubv Spectra; Astronomical Catalogs; Fourier Analysis; Light Curve; Stellar Orbits; Stellar Rotation; Variability; Astronomy; PHOTOMETRY; STARS: BINARIES; STARS: CHROMOSPHERES; STARS: VARIABLES full text sources ADS | data products SIMBAD (98) Related Materials (2) Part 1: 1988ApJS...67..439S Part 2: 1988ApJS...67..453S