MODELING IRON ABUNDANCE ENHANCEMENTS IN THE SLOW SOLAR WIND

Author
Byhring, Hanne Sigrun
Cranmer, S.R.
Lie-Svendsen, Øystein
Habbal, S. Rifai
Esser, Ruth
Date Issued
2011
Keywords
Solen
TermsetEmneord::Sol
TermsetEmneord::Solvind
TermsetEmneord::Jern
TermsetEmneord::Ioner
Permalink
http://hdl.handle.net/20.500.12242/441
https://ffi-publikasjoner.archive.knowledgearc.net/handle/20.500.12242/441
DOI
10.1088/0004-637X/732/2/119
Collection
Articles
Description
Byhring, Hanne Sigrun; Cranmer, S.R.; Lie-Svendsen, Øystein; Habbal, S. Rifai; Esser, Ruth. MODELING IRON ABUNDANCE ENHANCEMENTS IN THE SLOW SOLAR WIND. The Astrophysical Journal 2011 ;Volum 732.(2)
844912.pdf
Size: 529k
Abstract
We have studied the behavior of Fe ions in the slow solar wind, using a fluid model extending from the chromosphere to 1 AU. Emphasis is on elemental "pileup" in the corona, i.e., a region where the Fe density increases and has a local maximum. We study the behavior of individual Fe ions relative to each other in the pileup region, where Fe(+10) and Fe(+12) have been used as examples. We find that elemental pileups can occur for a variety of densities and temperatures in the corona. We also calculate the ion fractions and obtain estimates for the freezing-in distance of Fe in the slow solar wind. We find that the freezing-in distance for iron is high, between 3 and 11 R(circle dot), and that a high outflow velocity, of order 50-100 km s(-1), in the region above the temperature maximum is needed to obtain ion fractions for Fe(+10) and Fe(+12) that are consistent with observations.
View Meta Data