On the presence of linear polarization in the flare on 26 June, 1999

Solar flare on 26 June 1999 was accompanied by radio bursts giving an indirect evidence of accelerated superthermal particle beams. It is generally believed that this effect can stimulate an impact linear polarization in Balmer series spectral lines. The flare was observed simultaneously by the Ondř...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2004-06, Vol.2004 (IAUS223), p.463-464
Main Authors: Kotrč, P., Kashapova, L. K., Kupryakov, J. A.
Format: Article
Language:English
Subjects:
Astronomy
Contributed Papers
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Summary:Solar flare on 26 June 1999 was accompanied by radio bursts giving an indirect evidence of accelerated superthermal particle beams. It is generally believed that this effect can stimulate an impact linear polarization in Balmer series spectral lines. The flare was observed simultaneously by the Ondřejov Multichannel Flare Spectrograph (MFS) and by the Large Solar Vacuum Telescope (LSVT) using the polarization optics in the H$\alpha$ line. Spectropolarimetric data obtained by the two instruments are analyzed, however no substantial linear polarization was detected. Both spectral and auxiliary data, including radio and X-ray observations are analyzed to discuss possible reasons of the lack of linear polarization.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921304006519