Influence of non-thermal processes on line asymmetries in solar flares.

Details Influence of non-thermal processes on line asymmetries in solar flares. Influence of non-thermal processes on line asymmetries in solar flares.

Feb 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...318l..17d&link_type=abstract

Astronomy and Astrophysics, v.318, p.L17-L20

Astronomy and Astrophysics

Astrophysics

14

Line: Profiles, Sun: Flares

Scientific paper

We make line profile calculations for a flare atmosphere considering simultaneously the effect of non-thermal excitation and ionization of the hydrogen atoms caused by precipitating high-energy electrons, and the effect of possible chromospheric downflows. The results confirm the earlier finding that a downflow, if confined to the upper chromosphere, can sometimes produce a blue asymmetry of the Hα line. In addition, we find that the existence of such non-thermal effects tends to enhance the blue-asymmetry magnitude. In particular, the larger the energy flux, or the harder the energy spectrum for the beam electrons, the easier it will be to produce a blue-asymmetric Hα profile, which is simultaneously intensified and broadened. Possible reasons which make the blue asymmetry less popular than the red asymmetry in observations are discussed.

Affiliated with

Also associated with

No associations

Rating

Influence of non-thermal processes on line asymmetries in solar flares. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Influence of non-thermal processes on line asymmetries in solar flares., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Influence of non-thermal processes on line asymmetries in solar flares. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1772262