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Solar plasma generated by sungrazing comets

Published online by Cambridge University Press:  08 June 2011

F. S. Ibodov  and
S. Ibadov
F. S. Ibodov
Affiliation:
Sternberg Astronomical Institute, Moscow State University, Moscow email: [email protected], [email protected]
S. Ibadov
Affiliation:
Sternberg Astronomical Institute, Moscow State University, Moscow email: [email protected], [email protected] Institute of Astrophysics, Tajik Academy of Sciences, Dushanbe
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Abstract

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It is analytically shown that passages of comets near the Sun's surface with velocities more than 600 km/s is accompanied by aerodynamic crushing of their nuclei within the solar chromosphere and transversal expansion of the crushed matter. The deceleration of the flattened hypervelocity body within the solar photosphere has sharply impulsive and strongly explosive character. The specific energy release in the explosion zone near the solar surface 10-100 thousand times exceeds the evaporation heat of the nucleus material, so that the process is accompanied by generation of high-temperature plasma and non-stationary explosive phenomena around the photosphere. Spectral observations of these phenomena by SOHO and SDO type space observatories with high spatial and temporal resolutions are of interest for the plasma astrophysics as well as the physics of solar flares.

Keywords

Sun: generalsungrazing cometssolar impact plasmasolar photospheric flares
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S274: Advances in Plasma Astrophysics , September 2010 , pp. 92 - 94
Copyright
Copyright © International Astronomical Union 2011

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