Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...260..326r&link_type=abstract
Astrophysical Journal, Part 1, vol. 260, Sept. 1, 1982, p. 326-337. NSF-sponsored research;
Astronomy and Astrophysics
Astrophysics
51
Coronal Holes, Solar Corona, Solar Spectra, Solar Wind, Ultraviolet Spectra, Doppler Effect, Extreme Ultraviolet Radiation, Ultraviolet Spectrometers
Scientific paper
New evidence is presented that EUV emission lines formed at the levels of the base of the corona and the transition region are systematically shifted to shorter wavelengths within coronal holes relative to the rest of the solar disk, and that moreover this shift increases with height in the atmosphere. Measurements were made with a rocket-borne EUV spectrometer having high spectroscopic resolution and stability flown on July 15, 1980. Repeated measurements were made along a chord of the solar disk that crossed a compact coronal hole near sun center identified on gamma 10830 He I spectroheliograms. The maximum measured shift corresponded to a velocity of 12 km/sec in gamma 625 Mg X and 7 km/sec in gamma 629 O V. If these velocities correspond to a true mass flux, they provide important data on the acceleration of coronal plasma in open magnetic field regions. These observed Doppler displacements are a strong and significant signature of coronal holes, now measured on three rocket flights.
Klimchuk James A.
Orrall Frank Q.
Rottman Gary J.
No associations
LandOfFree
Measurements of outflow from the base of solar coronal holes 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 Measurements of outflow from the base of solar coronal holes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurements of outflow from the base of solar coronal holes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1256993