AN INFRARED SEARCH FOR HDO IN COMET D/2012 S1 (ISON) AND IMPLICATIONS FOR iSHELL

被引：6

作者：

Gibb, Erika L. ^{[1
]}

Bonev, Boncho P. ^{[2
,3
]}

DiSanti, Michael A. ^{[3
]}

Villanueva, Geronimo L. ^{[2
,3
]}

Paganini, Lucas ^{[2
,3
]}

Mumma, Michael J. ^{[3
]}

机构：

[1] Univ Missouri, Dept Phys & Astron, St Louis, MO 63121 USA

[2] Catholic Univ Amer, Dept Phys, Washington, DC 20064 USA

[3] NASA, Goddard Space Flight Ctr, Goddard Ctr Astrobiol, Greenbelt, MD 20771 USA

来源：

ASTROPHYSICAL JOURNAL | 2016年 / 816卷 / 02期

基金：

美国国家科学基金会;

关键词：

astrobiology; comets: individual (D/2012 ISON); methods: observational; planets and satellites: formation; techniques: spectroscopic; OH PROMPT EMISSION; CHEMICAL-COMPOSITION; WATER; ORIGIN; CHEMISTRY; RATIOS; II; LEE; D/H;

D O I：

10.3847/0004-637X/816/2/101

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We performed a sensitive search for HDO in comet D/2012 S1 (ISON) on 2013 November 16, 17, and 22 using CSHELL and the NASA Infrared Telescope Facility. We constrained the HDO/H2O ratio to < 2.0 VSMOW (the terrestrial ocean value) at the 3 sigma uncertainty level from two independent measurements corresponding to different H2O outgassing rates. This represents the best constrained HDO/H2O ratio for a comet using a small (3 m) telescope and illustrates that when CSHELL is replaced with iSHELL, 3 m class telescopes are still strong contenders for detecting minor volatile species in moderately bright comets.

引用

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