Detection of Co and ethane in comet 21P/Giacobini-Zinner: Evidence for variable chemistry in the outer solar nebula

Citation
Mj. Mumma et al., Detection of Co and ethane in comet 21P/Giacobini-Zinner: Evidence for variable chemistry in the outer solar nebula, ASTROPHYS J, 531(2), 2000, pp. L155-L159
Citations number
48
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004-637X → ACNP
Volume
531
Issue
2
Year of publication
2000
Part
2
Pages
L155 - L159
Database
ISI
SICI code
0004-637X(20000310)531:2<L155:DOCAEI>2.0.ZU;2-Q
Abstract
Ethane and carbon monoxide were detected in a short-period comet of probabl e Kuiper Belt origin. Ethane is substantially less abundant compared with H yakutake and Hale-Bopp, two comets from the giant-planet region of the sola r nebula, suggesting a heliocentric gradient in ethane in precometary ices. It is argued that processing by X-rays from the young Sun may be responsib le.