Solar wind from high-latitude coronal holes at solar maximum

D. J. McComas, H. A. Elliott, R. Von Steiger

Research output: Contribution to journalArticle

41 Scopus citations

Abstract

In this study we combine Ulysses' observations from the solar wind plasma (SWOOPS) and ion composition (SWICS) instruments to study high-latitude coronal holes near solar maximum for the first time. While chromospheric and coronal composition signatures indicate that there is a unique type of solar wind, which flows from coronal holes, variations in the acceleration process produce a wide range of solar wind speeds from these holes. High-speed wind (>700 km s-1) can be produced in small as well as large holes, although the very highest speed non-transient winds do come from the centers of the largest holes. Along the edges of coronal holes, the acceleration decreases and freezing-in temperatures increase relatively smoothly into the surrounding solar wind, indicating a transition layer around the edges of coronal holes.

Original languageEnglish (US)
Pages (from-to)28-1-28-4
JournalGeophysical Research Letters
Volume29
Issue number9
DOIs
StatePublished - May 1 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

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