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On the infrared observations of stellar flares

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Abstract

In connection with the appearance of the first results of infrared observations of stellar flares, a more elaborate analysis ofnegative infrared flares as a phenomenon, predicted by the fastelectron hypothesis, has been carried out. As a result, the wavelength regions of negative flares are established for the stars of different spectral types as well as the calculated amplitudes of the negative flares (Tables I and II).

The analysis of the infrared observations (c.f. Kilyachkoet al., 1978) lead to the following conclusions:

  1. (1)

    The negative infrared flares discovered around 8000 Å is not in agreement with the theory in the case of the flare star UV Cet. Some traces of negative flares have been noted for a number of less powerful flares of EV Lac.

  2. (2)

    The amplitudes of the recorded positive flares of UV Cet and EV Lac on λ8000 Å are in good agreement with the magnitudes predicted by the fast-electron hypothesis (non-thermal bremsstrahlung).

  3. (3)

    In the future the negative flares around 8000 Å should be looked for in early-type flare stars of types M0-K5.

  4. (4)

    For a positive discovery of negative flares, future observations must be carried out in the wavelength region of 1–3 μm.

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References

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Authors and Affiliations

  1. Garny Space Astronomy Laboratory, Armenian S.S.R., U.S.S.R.

    G. A. Gurzadyan

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  1. G. A. Gurzadyan
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Gurzadyan, G.A. On the infrared observations of stellar flares. Astrophys Space Sci 62, 45–53 (1979). https://doi.org/10.1007/BF00643902

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  • DOI: https://doi.org/10.1007/BF00643902

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