Observation of infrared lines in a prominence at 1 5 microns

Details Observation of infrared lines in a prominence at 1 5 microns Observation of infrared lines in a prominence at 1 5 microns

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996soph..165..257c&link_type=abstract

Solar Physics, Volume 165, Issue 2, pp.257-274

Physics

3

Scientific paper

We have observed 11 hydrogen and 3 helium lines in a quiescent prominence; none have been previously observed except for the He 10830 line. In contrast to Zirker's results based on longer-wavelength infrared lines, we find no net velocity shift, Doppler widths narrower than his by more than 30%, and a hydrogen excitation temperature 3 times higher. From the line intensity method, we find a helium temperature of 5300(±200) K and a hydrogen temperature of 10 900(±1900) K, in reasonable agreement with the findings of visible line studies. We conclude that helium lines are formed in the central region while hydrogen lines are formed around the edges of the prominence.

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