HR: 0800h
AN: SH12A-0852    [Abstracts]
TI: Quantifying the Exospheric Component of Soft X-ray Emission
AU: Kuntz, K
EM: kuntz@pha.jhu.edu
AF: Johns Hopkins University, Department of Physics and Astronomy, Baltimore, MD 21218, United States
AU: * Collier, M R
EM: michael.r.collier@nasa.gov
AF: NASA, GSFC, Greenbelt, MD 20771, United States
AU: Robertson, I
EM: robertin@ku.edu
AF: University of Kansas, Department of Physics and Astronomy, Lawrence, KS 66045, United States
AU: Hansen, K
EM: kenhan@umich.edu
AF: University of Michigan, AOSS, Ann Arbor, MI 48109, United States
AU: Snowden, S L
EM: snowden@milkyway.gsfc.nasa.gov
AF: NASA, GSFC, Greenbelt, MD 20771, United States
AU: Cravens, T
EM: cravens@ku.edu
AF: University of Kansas, Department of Physics and Astronomy, Lawrence, KS 66045, United States
AB: High charge state heavy ions in the solar wind exchange charge with ambient neutral gas. This process creates a product ion in an excited state. During the radiative cascade process, EUV and X-ray photons are emitted with energies in the range of about 100 eV to 1 keV. Because the terrestrial exospheric density at the nominal magnetopause location is relatively high, ~10 cm^-3, solar wind charge exchange, or SWCX, can be observed by Earth-orbiting soft X-ray instruments such as the ROSAT Position Sensitive Proportional Counters (PSPC). In this presentation, we will compare simulated and observed soft X-ray emission during an event on August 18-19, 1991 and discuss the role of exospheric SWCX emission for this and other events.
DE: 2784 Solar wind/magnetosphere interactions
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2007 Fall Meeting