AAS 205th Meeting, 9-13 January 2005
Session 141 Our Friendly Neighbors: M31 and M33
Poster, Thursday, January 13, 2005, 9:20am-4:00pm, Exhibit Hall

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[141.08] FIR Mapping of NGC 205 by Spitzer: a Spatially Resolved Study of the Cold Dust

F. R. Marleau, A. Noriega-Crespo (SSC), G. Rieke (University of Arizona), MIPS Team

We present new far-infrared observations, at 24, 70 and 160 microns of the M31 satellite dwarf galaxy NGC 205 obtained with MIPS, the multi-wavelength photometer onboard the Spitzer Space Telescope. The FIR images resolve three spatially distinct emitting regions, of sizes ranging between ~ 60 - 300 pc, which lie approximately along the galaxy's semi-major axis. The emission in all three bands displays a similar morphology suggesting that there is no significant stratification in the ISM. The spectral energy distribution measured in the resolved components rises with wavelength and indicates the presence of cold dust at similar temperature (T ~ 20 K). We find that the cold dust follows the asymmetric distribution of the HI gas, believed to have been caused by tidal interactions with M31.

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Bulletin of the American Astronomical Society, 36 5
© 2004. The American Astronomical Society.