ISSN:
1572-9672
Keywords:
Abundances
;
Coronal Streamers
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract A great deal of evidence for elemental abundance variations among different structures in the solar corona has accumulated over the years. Many of the observations show changes in the relative abundances of high- and low-First Ionization Potential elements, but relatively few show the absolute elemental abundances. Recent observations from the SOHO satellite give absolute abundances in coronal streamers. Along the streamer edges, and at low heights in the streamer, they show roughly photospheric abundances for the low-FIP elements, and a factor of 3 depletion of high-FIP elements. In the streamer core at 1.5 R·, both high- and low-FIP elements are depleted by an additional factor of 3, which appears to result from gravitational settling.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1005162803316
Permalink