UVCS/SOHO Observations of H I Lyman Alpha Line Profiles in Coronal Holes at Heliocentric Heights Above 3.0 R&sun;

Details UVCS/SOHO Observations of H I Lyman Alpha Line Profiles in Coronal Holes at Heliocentric Heights Above 3.0 R&sun; UVCS/SOHO Observations of H I Lyman Alpha Line Profiles in Coronal Holes at Heliocentric Heights Above 3.0 R&sun;

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ssrv...87..327s&link_type=abstract

Space Science Reviews, v. 87, Issue 1/2, p. 327-330 (1999).

Computer Science

6

Corona, Coronal Holes, Solar Wind, Uv Radiation, Spectroscopy, Line Profiles

Scientific paper

The Ultraviolet Coronagraph Spectrometer (UVCS) on the Solar and Heliospheric Observatory (SOHO) has been used to measure spectral line profiles for H I Lyα in the south polar coronal hole at projected heliocentric heights from 3.5 to 6.0 R&sun; during 1998 January 5 11. Observations from 1.5 to 2.5 R&sun; were made for comparison. The H I Lyα profile is the only one observable with UVCS above 3.5 R&sun; in coronal holes. Within this region the outflowing coronal plasma becomes nearly collisionless and the ionization balance is believed to become frozen.

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