Evidence for starspots on single solar-like stars

Details Evidence for starspots on single solar-like stars Evidence for starspots on single solar-like stars

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982aj.....87.1546d&link_type=abstract

Astronomical Journal, vol. 87, Nov. 1982, p. 1546-1557.

Astronomy and Astrophysics

Astronomy

37

Emission Spectra, H Alpha Line, Main Sequence Stars, Radiant Flux Density, Starspots, Stellar Spectrophotometry, Stellar Temperature, Calcium, Chromosphere, Electrophotometry, Periodic Variations, Potassium, Stellar Luminosity, Temperature Distribution

Scientific paper

H-alpha intermediate-band and narrowband and lambda 4530 photoelectric photometry carried out for five single main-sequence stars are presented. For HD 149661, HD 152391, and HD 201091 low amplitude variations of up to 0.04 mag at lambda 4530 are found. These variations are attributable to the presence of starspots, and in the cases of HD 149661 and HD 201091, an anti-correlation between the light variation and H-alpha and Ca II emission is found. Conclusions drawn from this study include the idea that these three stars have active chromospheres, and that the light variation/Ca II and H-alpha variations are similar to what is found in RS CVn systems.

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