INFRARED OBSERVATIONS OF METHANOL IN COMET P/SWIFT-TUTTLE

被引：15

作者：

HOBAN, S ^{[1
]}

REUTER, DC ^{[1
]}

DISANTI, MA ^{[1
]}

MUMMA, MJ ^{[1
]}

ELSTON, R ^{[1
]}

机构：

[1] CERRO TOLOLO INTERAMER OBSERV,LA SERENA,CHILE

来源：

ICARUS | 1993年 / 105卷 / 02期

关键词：

D O I：

10.1006/icar.1993.1148

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present infrared spectroscopic observations of Comet P/Swift-Tuttle obtained with the Cryogenic Spectrometer at Kitt Peak on 1992 November 8, 9, and 12 and December 8 and 10. The spectra cover the 2.9-3.6-μm region. We detect emission from the v3 band of cometary methanol at 3.52 μm in all of our spectra. During this time, the production rate of methanol was QCH3OH = 2-6 × 1028 sec-1, with weak evidence for short-term temporal variability in QCH3OH. We find the weighted average for the relative abundance of methanol with respect to water to be 7 ± 1%, which supports the notion that methanol constitutes a significant fraction of the volatile carbon in comets. Our spectra of Comet P/Swift-Tuttle indicate that the v2 and v9 bands of methanol comprise approximately 60% of the "cometary organic feature" centered near 3.4 μm. Formaldehyde was not detected in these spectra; upper limits are presented. © 1993 by Academic Press, Inc.

引用

页码：548 / 556

页数：9

共 33 条

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