The helium line formation in late-type stars. I - The quiet sun

Details The helium line formation in late-type stars. I - The quiet sun The helium line formation in late-type stars. I - The quiet sun

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.240...23b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 240, Sept. 1, 1989, p. 23-32.

Astronomy and Astrophysics

Astronomy

4

Helium, Late Stars, Line Spectra, Solar Atmosphere, Solar Spectra, Stellar Models, Atmospheric Models, Extreme Ultraviolet Radiation, Hot Stars, Nonequilibrium Thermodynamics, Solar X-Rays

Scientific paper

The formation of helium lines and continua in an atmospheric model representing the medium quiet sun has been investigated, considering the influence of changes in the temperature gradient at transition region, the coronal radiation, and the overlapping of He II Ly-alpha at 304 A and the continuum radiation of He I at wavelengths below 504 A. By diminishing the thermal gradient in the transition region a large part of the helium observations are reproduced. The He II continuum at 228 A as well as the L-beta line at 256 A can be adjusted to observations if a characteristic solar coronal flux is incident on the optimized transition region.

Affiliated with

Also associated with

No associations

Rating

The helium line formation in late-type stars. I - The quiet sun 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 The helium line formation in late-type stars. I - The quiet sun, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The helium line formation in late-type stars. I - The quiet sun will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-766121