HR: 08:00h
AN: SH11A-01 INVITED     [PDF]
TI: Solar Coronal Abundance Variations
AU: * Ko, Y
EM: yko@cfa.harvard.edu
AF: Harvard-Smithsonian Center for Astrophysics, 60 Garden St., MS-50, Cambridge, MA 02138 United States
AU: Raymond, J C
EM: jraymond@cfa.harvard.edu
AF: Harvard-Smithsonian Center for Astrophysics, 60 Garden St., MS-50, Cambridge, MA 02138 United States
AB: Coronal abundances are found to vary among different coronal structures, within streamers, and along heliocentric heights. Characterizing its variations is essential in understanding the underlying fractionation mechanisms and the coronal origin of the solar wind. We will review recent measurements in solar coronal abundance and its variations with time and among coronal structures. In particular, we will present SOHO observations of abundances in active regions with a broad range of age and activity levels. Results that compare coronal abundances with in-situ measurements will also be reviewed.
DE: 7500 SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY
DE: 7509 Corona
DE: 7549 Ultraviolet emissions
SC: SPA - Solar and Heliospheric Physics [SH]
MN: 2003 Fall Meeting