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Detection of CO and Ethane in Comet 21P/Giacobini-Zinner: Evidence for Variable Chemistry in the Outer Solar NebulaEthane and carbon monoxide were detected in a short-period comet of probable Kuiper belt origin. Ethane is substantially less abundant compared with Hyakutake and Hale-Bopp, two comets from the giant-planets region of the solar nebula, suggesting a heliocentric gradient in ethane in pre-cometary ices. It is argued that processing by X-rays from the young sun may be responsible.
Document ID
20000032751
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Mumma, M. J. (NASA Goddard Space Flight Center Greenbelt, MD United States)
DiSanti, M. A. (NASA Goddard Space Flight Center Greenbelt, MD United States)
DelloRusso, N. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Magee-Sauer, K. (Rowan Univ. Glassboro, NJ United States)
Rettig, T. W. (Notre Dame Univ. IN United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 1999
Subject Category
Astrophysics
Funding Number(s)
CONTRACT_GRANT: NAG5-7905
PROJECT: RTOP 344-32-30-07
CONTRACT_GRANT: NAG5-7753
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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