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Broadening of hydrogen Balmer lines during a flare on the dMe star YZ CMi

  • J. G. Doyle
  • P. B. Byrne
Heating of Stellar Chromospheres and Coronae
Part of the Lecture Notes in Physics book series (LNP, volume 291)

Abstract

Broad-band photometric observations of YZ CMi show a 1.2 magnitude U-band flare at 19:55 UT on 4 March 1985. During the flare, optical spectra show excess emission in the wings of all the hydrogen Balmer lines. Interpreted in terms of mass flows would imply material moving at ∼300 km s−1 simultaneously to the blue and red or alternatively random mass motions with a velocity of a similar magnitude. At flare maximum, all the Balmer lines show excess emission in the wings with H α and 11 δ showing symmetrically broadened lines while higher members of the series such as H ζ and H η show predominately red shifted material.

Keywords

Solar Phys Solar Flare Balmer Line Excess Emission Flare Star 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Doyle, J.G., Butler, C.J., Haisch, B.M., Rodono, M.: MNRAS 223,1p.Google Scholar
  2. Gaizauskas, V.: 1986, “The Lower Atmosphere of Solar Flares”, ed. D.F. Neidig.Google Scholar
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  6. Vidal, C.R., Cooper, J., Smith, E.W.: 1973, Astrophys J. Supp 25, 37.Google Scholar

Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • J. G. Doyle
    • 1
  • P. B. Byrne
    • 1
  1. 1.Armagh ObservatoryArmaghN. Ireland

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