UVCS/SOHO Observations of Coronal Holes from Solar Minimum to Solar Maximum

Details UVCS/SOHO Observations of Coronal Holes from Solar Minimum to Solar Maximum UVCS/SOHO Observations of Coronal Holes from Solar Minimum to Solar Maximum

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsh32a0721m&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SH32A-0721

Astronomy and Astrophysics

Astrophysics

2164 Solar Wind Plasma, 2169 Sources Of The Solar Wind, 7511 Coronal Holes, 7536 Solar Activity Cycle (2162), 7549 Ultraviolet Emissions

Scientific paper

Coronal holes are open field, low-density source regions of the solar wind. At solar minimum, large coronal holes are present at the poles and are the dominant source of the solar wind flow for this part of the solar cycle. At solar maximum, coronal holes of varying sizes and shapes appear at all latitudes and last for several rotations. During this stage of the cycle, the dominant component is mainly slow wind, but fast wind streams are generated by large coronal holes. UVCS/SOHO has been used to measure the plasma properties in several types of coronal holes from 1996 to 2001. Spectroscopic diagnostics of O5+ velocity distributions and outflow velocities are derived from measurements of intensities and line widths for O~VI 103.2 and 103.7 nm as a function of height. We compare the plasma properties of coronal holes from solar minimum to solar maximum and discuss the evolution of coronal holes during the solar cycle. We also study the compatibility between the growing database of coronal hole plasma properties and theoretical models of extended coronal heating via ion cyclotron resonance. This work is supported by NASA under Grant NAG5-10093 to the Smithsonian Astrophysical Observatory, by the Italian Space Agency and by PRODEX (Swiss contribution).

Affiliated with

Also associated with

No associations

Rating

UVCS/SOHO Observations of Coronal Holes from Solar Minimum to Solar Maximum 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 UVCS/SOHO Observations of Coronal Holes from Solar Minimum to Solar Maximum, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and UVCS/SOHO Observations of Coronal Holes from Solar Minimum to Solar Maximum will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1382063