Physics
Scientific paper
Jun 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aps..dmp..s508c&link_type=abstract
American Physical Society, DAMOP Meeting, 14-June 17, 2000 Storrs, CT, abstract #S5.08
Physics
Scientific paper
Surprising X-ray emission from a comet as it approached the Sun was first observed by Lisse et al. al. in 1996.(C. M. Lisse et al. al.), Science 274, 205 (1996) One of the mechanisms believed to be contributing to this emission is the interaction of highly-charged solar- wind ions with the cometary gases. Reported here will be absolute charge-exchange (ce) and normalized X-ray emission cross sections for collisions of high charge-state (+3 to +10) C, N, O, and Ne ions with the cometary species H_2O and CO_2.(J. B. Greenwood, S. J. Smith, and A. Chutjian, Ap. J. 529), 605 (2000) It is found that in several cases the double ce cross section can be large, and in the case of C^3+ they are equal to those for single ce. Present results are compared with values used in recent comet models.
Chutjian Ara
Greenwood Jason B.
Smith Stephen J.
Williams I. D.
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