SIMBAD references

1999PASP..111..335W - Publ. Astron. Soc. Pac., 111, 335-341 (1999/March-0)

The CaII-Mv correlation (Wilson-Bappu effect) calibrated by Hipparcos parallaxes.


Abstract (from CDS):

We have used Hipparcos parallaxes 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. In appendices we show some sample Ca II profiles and identify emission lines of Fe II as well as the Hε line in some stars.

Abstract Copyright:

Journal keyword(s): Stars: Chromospheres - Stars: Distances - Stars: Fundamental Parameters

VizieR on-line data: <Available at CDS (J/PASP/111/335): table1a.dat table1b.dat table1c.dat + figures>

Simbad objects: 43

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