WATER VAPORIZATION ON CERES

被引：92

作者：

AHEARN, MF ^{[1
]}

FELDMAN, PD ^{[1
]}

机构：

[1] JOHNS HOPKINS UNIV,DEPT PHYS & ASTRON,BALTIMORE,MD 21218

来源：

ICARUS | 1992年 / 98卷 / 01期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1016/0019-1035(92)90206-M

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present long-exposure IUE spectra of the region around Ceres in which one might find escaping OH resulting from the photodissociation of atmospheric water vapor. An exposure off the southern limb of Ceres before perihelion shows no evidence for OH emission. An exposure off the northern limb of Ceres after perihelion shows a statistically significant detection of OH. The amount of OH is consistent with, among many possibilities, a polar cap which is replenished during winter by subsurface percolation as discussed by Fanale and Salvail (1989, Icarus 82, 97-110) and which dissipates in summer. © 1992.

引用

页码：54 / 60

页数：7

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