THE DUST-TO-GAS RATIO IN THE SMALL MAGELLANIC CLOUD TAIL

被引：37

作者：

Gordon, K. D. ^{[1
]}

Bot, C. ^{[17
]}

Muller, E. ^{[16
]}

Misselt, K. A. ^{[15
]}

Bolatto, A. ^{[14
]}

Bernard, J. -P. ^{[13
]}

Reach, W. ^{[12
]}

Engelbracht, C. W. ^{[15
]}

Babler, B. ^{[11
]}

Bracker, S. ^{[11
]}

Block, M. ^{[15
]}

Clayton, G. C. ^{[10
]}

Hora, J. ^{[9
]}

Indebetouw, R. ^{[8
]}

Israel, F. P. ^{[7
]}

Li, A. ^{[6
]}

Madden, S. ^{[5
]}

Meade, M. ^{[11
]}

Meixner, M. ^{[1
]}

Sewilo, M. ^{[1
]}

Shiao, B. ^{[1
]}

Smith, L. J. ^{[1
,4
]}

van Loon, J. Th. ^{[3
]}

Whitney, B. A. ^{[2
]}

机构：

[1] STScI, Baltimore, MD 21218 USA

[2] Space Sci Inst, Boulder, CO 80301 USA

[3] Keele Univ, Lennard Jones Lab, Astrophys Grp, Keele ST5 5BG, Staffs, England

[4] UCL, Dept Phys & Astron, London WC1E 6BT, England

[5] CEA Saclay, Serv Astrophys, F-91191 Gif Sur Yvette, France

[6] Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA

[7] Leiden Univ, Sterrewacht Leiden, NL-2300 RA Leiden, Netherlands

[8] Univ Virginia, Dept Astron, Charlottesville, VA 22903 USA

[9] Harvard Smithsonian, CfA, Cambridge, MA 02138 USA

[10] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[11] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA

[12] CALTECH, IPAC, Pasadena, CA 91125 USA

[13] CESR, F-31028 Toulouse, France

[14] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[15] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA

[16] Nagoya Univ, Dept Astrophys, Chikusa Ku, Nagoya, Aichi 4648602, Japan

[17] Univ Strasbourg, Ctr Donnees Astron Strasbourg CDS, UMR 7550, F-67000 Strasbourg, France

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2009年 / 690卷 / 01期

关键词：

dust; extinction; galaxies: individual (SMC); galaxies: ISM; MULTIBAND IMAGING PHOTOMETER; SPITZER-SPACE-TELESCOPE; GALAXY EVOLUTION SAGE; CHEMICAL-COMPOSITION; MOLECULAR CLOUDS; STAR-FORMATION; MILKY-WAY; BRIDGE; EMISSION; METALLICITY;

D O I：

10.1088/0004-637X/690/1/L76

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Tail region of the Small Magellanic Cloud (SMC) was imaged using the MIPS instrument on the Spitzer Space Telescope as part of the SAGE-SMC Spitzer Legacy. Diffuse infrared emission from dust was detected in all the MIPS bands. The Tail gas-to-dust ratio was measured to be 1200 +/- 350 using the MIPS observations combined with existing IRAS and H I observations. This gas-to-dust ratio is higher than the expected 500-800 from the known Tail metallicity indicating possible destruction of dust grains. Two cluster regions in the Tail were resolved into multiple sources in the MIPS observations and local gas-to-dust ratios were measured to be similar to 440 and similar to 250 suggest dust formation and/or significant amounts of ionized gas in these regions. These results support the interpretation that the SMC Tail is a tidal Tail recently stripped from the SMC that includes gas, dust, and young stars.

引用

页码：L76 / L80

页数：5

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