Variability of the Lyman alpha flux with solar activity

Details Variability of the Lyman alpha flux with solar activity Variability of the Lyman alpha flux with solar activity

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.5751l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, July 1, 1983, p. 5751-5759. NOAA-supported research.

Physics

54

Chromosphere, Lyman Alpha Radiation, Solar Flux Density, Solar Activity, Solar Cycles, Sunspots, Twenty-Seven Day Variation

Scientific paper

The variability of the Lyman alpha flux during 1969-1980 is calculated using a three-component model of the solar chromosphere, based on ground observations of the Ca II K chromosphere emission. Model predictions show that the Lyman alpha flux increases to as much as 5 x 10 to the 11 photons sq cm/s at the maximum of the solar cycle. The ratio of the average fluxes for December 1979 (cycle maximum) and July 1976 (cycle minimum) is determined to be 1.9. During the solar maximum the 27 day solar rotation is found to cause variations of 5-40 percent in the Lyman alpha flux. It is also shown that the Lyman alpha flux varies over intermediate time periods of 2-3 yr, as well as over the 11 yr sunspot cycle. It is concluded that, unlike the sunspot number and the 10.7 cm radio flux, the Lyman alpha flux had a variability that was approximately the same during each of the past three cycles.

Affiliated with

Also associated with

No associations

Rating

Variability of the Lyman alpha flux with solar activity 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 Variability of the Lyman alpha flux with solar activity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variability of the Lyman alpha flux with solar activity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1628303