Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001dps....33.4701j&link_type=abstract
American Astronomical Society, DPS Meeting #33, #47.01; Bulletin of the American Astronomical Society, Vol. 33, p.1124
Astronomy and Astrophysics
Astronomy
1
Scientific paper
The jovian trapped particle radiation chemically alters the Galilean satellite surfaces, a process referred to as radiolysis. This leads to the chemical alteration and decomposition of the surface materials and the production of volatiles (Johnson 2001). Radiolysis likely accounts for the darkening of the polar regions of Io (Johnson 1997), the O2 (Calvin et al 1996), peroxide (Carlson et al 1999a) and, possibly, O3 (Noll et al 1996) in icy satellite surfaces, the radiolytic sulfur cycle on Europa (Carlson et al 1999b), the production of O2 (Hall et al. 1995) and alkali atmospheres (Brown and Hill, 1996) and, possibly, the production of the CO2 atmosphere at Callisto (Carlson 1999). Results for the radiolytic processing of likely surface materials will be used to create atmospheric models and to describe surface aging. Emphasis will be on Europa's surface and atmosphere. Brown, M.E. and R.E. Hill Nature 380,229(1996) Calvin, W., et al. GRL 23, 673(1996) Carlson, R.W., Science 283,820(1999) Carlson, R.W. et al., Science 286, 97(1999a) Carlson, R.W., et al. Science 283, 2062(1999b Hall, D.T. et al. Nature 373, 677(1995) Johnson, R.E., Icarus 128, 469 (1997) 469- 471. Johnson, R.E., et al., GRL 25, 3257(1998) Johnson, R.E., In,Chemical Dynamics in Extreme Environments (R.Dessler,Ed)390 (2001) Noll, K.S. et al., Science 273, 607(1996)
Carlson Richard W.
Johnson Robert E.
LeBlanc Francis
Shematovich Valery I.
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