HR 1099 and the starspot hypothesis for RS Canum Venaticorum binaries

Details HR 1099 and the starspot hypothesis for RS Canum Venaticorum binaries HR 1099 and the starspot hypothesis for RS Canum Venaticorum binaries

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...239l.121r&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 239, Aug. 1, 1980, p. L121-L124.

Other

58

Astronomical Photography, Binary Stars, Starspots, Stellar Atmospheres, Stellar Spectrophotometry, Stellar Structure, Photosphere, Spectrum Analysis, Stellar Luminosity, Stellar Temperature, Temperature Gradients

Scientific paper

Observations of the RS CVn binary HR 1099 (V711 Tau) have been made using the CCD camera at KPNO to test the starspot hypothesis spectroscopically. A TiO band system near 8860 A is shown to strengthen greatly at phases when starspots have been predicted to be present on the visible hemisphere. Data from other spectral regions support this result. A minimum temperature difference of 1000 K between the spot and photosphere is indicated.

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