Evidence for temporal variations in polar plumes

Details Evidence for temporal variations in polar plumes Evidence for temporal variations in polar plumes

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983soph...89...77w&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 89, Nov. 1983, p. 77-88.

Physics

10

Coronal Holes, Plasma Acceleration, Plasma Heating, Solar Spectra, Solar Wind, Extreme Ultraviolet Radiation, Periodic Variations, Radiant Flux Density, Solar Temperature, Statistical Analysis

Scientific paper

The variability of the O VI and Mg X emissions from four plumes is studied in order to place empirical constraints on possible plasma heating processes and acceleration mechanisms for mass flows in polar plumes. The observations comprise a 40 min seqeunce of spectroheliograms acquired with a temporal resolution of approximately 2 min. It is found that the Mg X emission from each plume has a strong 'dc' component and that any variations occurred at approximately the 10 percent (of the mean) level or less. This means that temporal variations in the density and/or temperature were 5 percent or less. Some statistically significant variations in the measured Mg X signals are seen. It is noted that two of the plumes decreased in brightness by approximately 10 percent during the 40 min period of the observations. Besides this, two plumes exhibited short-term (few minute) variations that are seen as statistically significant at a confidence level of more than 90 percent. The latter variations (if real) are thought to be due to small (approximately 20,000 K) fluctuations in temperature caused by fluctuations in the local plasma heating rate.

Affiliated with

Also associated with

No associations

Rating

Evidence for temporal variations in polar plumes 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 Evidence for temporal variations in polar plumes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for temporal variations in polar plumes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1488715