期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 690, 期 1, 页码 L76-L80出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/690/1/L76
关键词
dust, extinction; galaxies: individual (SMC); galaxies: ISM
资金
- NASA
- STFC [ST/F00267X/1, PP/F000057/1, ST/G002355/1, ST/G002827/1, PP/D000955/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/F00267X/1, PP/D000955/1, ST/G002355/1, PP/F000057/1, ST/G002827/1] Funding Source: researchfish
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.
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