Impact Hα line polarization and return current
نویسندگان
چکیده
منابع مشابه
Generation of solar Hα impact polarization by fragmented evaporative upflows
In this paper a novel mechanism is proposed for the generation of Hα impact polarization observed during some solar flares. Rather than being generated by the primary particle beams transporting energy from the chromosphere to the corona, we suggest that following heating, the solar chromosphere evaporates in a fragmented manner, and that impact excitations in the regions of interaction of hot ...
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The Hα-line intensity, linear and circular impact polarisation were calculated during the impulsive phase of flares using the density matrix approach. Depolarising effects of diffusive radiation and collisions with thermal electrons are considered for a 3 levels Hydrogen model atom with Zeeman splitting in weak and intermediate magnetic fields. Electron beam energy and angular distributions in ...
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Context. We present a theoretical review of the effect of impact polarization of a hydrogen Hα line due to an expected proton beam bombardment in solar flares. Aims. Several observations indicate the presence of the linear polarization of the hydrogen Hα line observed near the solar limb above 5 % and preferentially in the radial direction. We theoretically review the problem of deceleration of...
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Note: this poster is a summary of a more detailed paper
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2002
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20011775