On the formation of the He I 10 830 Å line in a flaring atmosphere

Details On the formation of the He I 10 830 Å line in a flaring atmosphere On the formation of the He I 10 830 Å line in a flaring atmosphere

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...432..699d&link_type=abstract

Astronomy and Astrophysics, Volume 432, Issue 2, March III 2005, pp.699-704

Astronomy and Astrophysics

Astrophysics

2

Line: Profiles, Sun: Atmosphere, Sun: Flares, Stars: Atmospheres

Scientific paper

We explore the formation of the He i 10 830 Å line in a flaring atmosphere, with special attention to the nonthermal effects of an electron beam. Using non-LTE calculations we obtain the line profiles from different model atmospheres. Without the nonthermal effects, the line changes from weak absorption in a cool atmosphere to emission in a hot and condensed atmosphere, as expected. However, the presence of an electron beam can significantly change the line strength, producing much stronger absorption and emission in these two cases. We find that in the nonthermal case, the collisional ionization of He i followed by recombinations becomes an important process in populating the triplet levels corresponding to the He i 10 830 Å line. These results suggest that the He i 10 830 Å line is also a potential diagnostic tool for nonthermal effects in solar or stellar flares.

Affiliated with

Also associated with

No associations

Rating

On the formation of the He I 10 830 Å line in a flaring atmosphere 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 On the formation of the He I 10 830 Å line in a flaring atmosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the formation of the He I 10 830 Å line in a flaring atmosphere will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1213000