Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...226..687j&link_type=abstract
Astrophysical Journal, Part 1, vol. 226, Dec. 1, 1978, p. 687-697.
Astronomy and Astrophysics
Astrophysics
59
Emission Spectra, Far Ultraviolet Radiation, H Alpha Line, Solar Spectra, Ultraviolet Spectra, Late Stars, Optical Transition, Planetary Atmospheres, Rocket-Borne Instruments, Sunspots
Scientific paper
A sunspot EUV spectrum covering the wavelength range from 1175 to 1714 A with high spatial and spectral resolution is examined which contains about 200 lines not previously reported in solar spectra. Many of the lines are identified as transitions in the Lyman bands of H2. It is shown that the H2 lines are photoexcited not only by H L-alpha, as reported previously, but also by the strong transition-region lines of C II, Si IV, and O IV. The line intensities are analyzed as far as is possible at present, and differences between the quiet chromosphere and the sunspot chromosphere are deduced. The polarization of the observed lines is briefly discussed, the importance of the H L-alpha fluorescence mechanism for the excitation of the H2 Lyman bands is demonstrated, and it is concluded that the H2 lines could also be observable in stars of spectral type later than the sun.
Bartoe John-David F.
Brueckner Guenter E.
Jordan Cathy
Sandlin Glenn D.
Vanhoosier Michael E.
No associations
LandOfFree
Emission lines of H2 in the extreme-ultraviolet solar spectrum 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 Emission lines of H2 in the extreme-ultraviolet solar spectrum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Emission lines of H2 in the extreme-ultraviolet solar spectrum will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-886115