CaII-Mv Correlation (Wilson-Bappu Effect) (Wallerstein+

Details CaII-Mv Correlation (Wilson-Bappu Effect) (Wallerstein+ CaII-Mv Correlation (Wilson-Bappu Effect) (Wallerstein+

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ycat..61110335w&link_type=abstract

VizieR On-line Data Catalog: J/PASP/111/335. Originally published in: 1999PASP..111..335W

Physics

Parallaxes: Trigonometric, Magnitudes: Absolute, Photometry: K-Line, Stars: Late-Type

Scientific paper

Hipparcos parallaxes were used to derive absolute visual magnitudes of G, K, and M stars with Ca II emission line widths previously measured by O.C. Wilson. A linear relationship similar to the one derived originally by Wilson & Bappu and improved by Lutz & Kelker was found from Mv=+7 to -2. For stars brighter than Mv=-2 a substantial number of stars show Ca II emission lines that are broader than expected from the linear fit. Most of those stars are bright giants and supergiants of type G. (3 data files).

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