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The Distribution of Chromospheric Emission Strengths Among Red Dwarfs

  • Conference paper
Activity in Red-Dwarf Stars

Part of the book series: Astrophysics and Space Science Library ((ASSL,volume 102))

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Abstract

The survey of Vaughan and Preston (1980, hereafter VP) of Ca II emission among solar neighborhood stars has shown the distribution of chromospheric emission (CE) of these stars. For stars bluer than (B-V)= 1.50, it is possible to transform VP’s equivalent width S into a relative flux by use of Middelkoop’s (1982) formulae. This enables construction of a chromospheric color-magnitude diagram (illustrated in Soderblom 1982), which shows the same general features as VP’s log S vs. (B-V) plot, except that the CE (as a fraction of the stellar luminosity) declines with mass due to the decline of the ZAMS rotational velocity with mass (Soderblom 1983).

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References

  • Baliunas., S.L., Vaughan, A.H., Middelkoop, F., Hartmann, L.W., Mihalis, D., Noyes, R.W., Preston, G.W., Frazer, J., and Lanning, H.: 1983, Astrophys. J., in press.

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Author information

Authors and Affiliations

  1. Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts, USA

    David R. Soderblom

Authors
  1. David R. Soderblom
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Editor information

Editors and Affiliations

  1. Armagh Observatory, Northern Ireland

    Patrick B. Byrne

  2. Astrophysical Observatory, Italy

    Marcello Rodonò

  3. University of Catania, Italy

    Marcello Rodonò

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© 1983 Springer Science+Business Media Dordrecht

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Soderblom, D.R. (1983). The Distribution of Chromospheric Emission Strengths Among Red Dwarfs. In: Byrne, P.B., Rodonò, M. (eds) Activity in Red-Dwarf Stars. Astrophysics and Space Science Library, vol 102. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-7157-8_7

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  • DOI: https://doi.org/10.1007/978-94-009-7157-8_7

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-009-7159-2

  • Online ISBN: 978-94-009-7157-8

  • eBook Packages: Springer Book Archive

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