Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991azh....68..404p&link_type=abstract
Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 68, Mar.-Apr. 1991, p. 404-410. In Russian.
Astronomy and Astrophysics
Astronomy
Helium, Line Spectra, Solar Atmosphere, Solar Spectra, Chromosphere, Solar Activity, Solar Magnetic Field
Scientific paper
Results of observations of He I dark points made with the Pulkovo TV magnetograph are presented. Spectroheliograms of the same solar regions obtained at an interval of several minutes in the He I 10830 A, H-alpha, and K Ca II lines are compared. The comparison shows, within an accuracy of 2 arcsec, that the helium network is localized in the same places as the chromospheric network in the H-alpha and K Ca II lines. Moreover, the locations of the majority of large He I dark points coincide rather well with bright calcium and hydrogen flocculi. The number of visible He I dark points on the solar disk is in antiphase with the Wolf numbers. The coefficient of the reverse correlation is -0.78 for the period 1976-1989. There are more than 500 dark points on the visible hemisphere in the minimum of the sunspot cycle, and about 120 to 200 in the maximum.
No associations
LandOfFree
The structure of the solar atmosphere as observed in the He I 10830 A line 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 structure of the solar atmosphere as observed in the He I 10830 A line, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The structure of the solar atmosphere as observed in the He I 10830 A line will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1790744