SPITZER IRAC DETECTION AND ANALYSIS OF SHOCKED MOLECULAR HYDROGEN EMISSION

被引：48

作者：

Ybarra, Jason E. ^{[1
]}

Lada, Elizabeth A. ^{[1
]}

机构：

[1] Univ Florida, Dept Astron, Gainesville, FL 32611 USA

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2009年 / 695卷 / 01期

关键词：

ISM: individual (HH 54); ISM: jets and outflows; ISM: lines and bands; INFRARED ARRAY CAMERA; ASTROPHYSICAL MEDIA; SPACE-TELESCOPE; LINE EMISSION; H-2; OUTFLOW; CLUSTER; CLOUDS; WAVES; ORION;

D O I：

10.1088/0004-637X/695/1/L120

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We use statistical equilibrium equations to investigate the Infrared Array Camera (IRAC) color space of shocked molecular hydrogen. The location of shocked H(2) in [3.6] - [4.5] versus [4.5] - [5.8] color is determined by the gas temperature and density of neutral atomic hydrogen. We find that high excitation H(2) emission falls in a unique location in the color-color diagram and can unambiguously be distinguished from stellar sources. In addition to searching for outflows, we show that the IRAC data can be used to map the thermal structure of the shocked gas. We analyze archival Spitzer data of Herbig-Haro object HH 54 and create a temperature map, which is consistent with spectroscopically determined temperatures.

引用

页码：L120 / L123

页数：4

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