Chemistry in cometary comae

被引：33
|
作者：
Irvine, WM [1 ]
Dickens, JE
Lovell, AJ
Schloerb, FP
Senay, M
Bergin, EA
Jewitt, D
Matthews, HE
机构：
[1] Univ Massachusetts, Five Coll Radio Astron Observ, Amherst, MA 01003 USA
[2] Smithsonian Astrophys Observ, Cambridge, MA 02138 USA
[3] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA
[4] Joint Astron Ctr, Hilo, HI 96720 USA
来源：
FARADAY DISCUSSIONS | 1998年 / 109卷
关键词：
D O I：
10.1039/a709289j
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Significant gas-phase chemistry occurs in the comae of bright comets, as is demonstrated here for the case of Comet Hale-Bopp. The abundance ratio of the two isomers, hydrogen cyanide and hydrogen isocyanide, is shown to vary with heliocentric distance in a way that is consistent with production of HNC by ion-molecule chemistry initiated by the photoionization of water. Likewise, the first maps of emission from HCO+ show an abundance and an extended distribution that are consistent with the same chemical model.
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页码：475 / 492
页数：18
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