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The Effect of Electron Beams on the Hydrogen Emission in Impulsive Flares on the Sun and Stars

Published online by Cambridge University Press:  12 April 2016

V.V. Zharkova  and
V.A. Kobylinsky
V.V. Zharkova
Affiliation:
Physics Department, Kiev University, Glushkova 6, Kiev 252022, Ukraine
V.A. Kobylinsky
Affiliation:
Physics Department, Kiev University, Glushkova 6, Kiev 252022, Ukraine

Extract

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Flares are very frequent phenomena on the sun and on other stars and are actively investigated with precise observational techniques. These studies are particularly stimulated by recent X-ray and UV observations on spacecraft (Skylab, SMM). From all these observations the flares on the sun and stars seem to be of the same physical nature but of different energetic power. A number of investigations devoted to comparison between the solar and stellar flares led to the conclusion that they have the similar mechanisms for the energy release and transport and for their manifestations in different ranges of electromagnetic radiation.

The hydrogen emission is easy to observe in these events, and thus it is convenient for diagnostic analysis of physical conditions in the flares. However, the impulsive events were considered to be observed in X-rays so only. Zharkova & Kobylinsky (1992, 1993) have recently shown that the hydrogen continuous radiation of the solar flares is sensitive to the electron beam parameters. We also develop an approach to detection of the flares of non-thermal or thermal origin by observing the hydrogen Balmer and Pashen continuum emissions with high temporal resolution.

Type
XI. Supplement
Information
International Astronomical Union Colloquium , Volume 137: Inside the Stars , 1993 , pp. 801 - 803
Copyright
Copyright © Astronomical Society of the Pacific 1993

References

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