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The dust-to-dust gas ratio in the Small Magellanic Cloud Tail

Gordon, K. D. and Bot, C. and Muller, E. and Misselt, K. A. and Bolatto, A. and Bernard, J.-P. and Reach, W. and Engelbracht, C. W. and Babler, B. and Bracker, S. and Block, M. and Clayton, G. C. and Hora, J. and Indebetouw, R. and Israel, F. P. and Li, A. and Madden, S. and Meade, M. and Meixner, M. and Sewilo, M. and Shiao, B. and Smith, L. J. and van Loon, J. Th. and Whitney, B. A. (2009) The dust-to-dust gas ratio in the Small Magellanic Cloud Tail. Astrophysical Journal Letters, 690 (1). L76-L80. ISSN 2041-8205.

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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 ~440 and ~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.

Item Type:Article
Related URLs:
URLURL TypeDescription
Bolatto, A.0000-0002-5480-5686
Reach, W.0000-0001-8362-4094
Hora, J.0000-0002-5599-4650
Sewilo, M.0000-0003-2248-6032
Smith, L. J.0000-0002-0806-168X
Additional Information:© 2009 The American Astronomical Society. Received 2008 September 22; accepted 2008 November 10; published 2008 December 8. This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under NASA contract 1407. Support for this work was provided by NASA through a contract issued by JPL/Caltech to Space Telescope Science Institute.
Funding AgencyGrant Number
Subject Keywords:dust, extinction; galaxies: individual (SMC); galaxies: ISM
Issue or Number:1
Record Number:CaltechAUTHORS:20090416-105516204
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:13997
Deposited By: Tony Diaz
Deposited On:22 Apr 2009 18:39
Last Modified:09 Mar 2020 13:19

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