Physics
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009eimw.confe..25f&link_type=abstract
"The Evolving ISM in the Milky Way and Nearby Galaxies, The Fourth Spitzer Science Center Conference, Proceedings of the confere
Physics
Infrared: Ism, Ism: Dust, Extinction, Ism: Structure
Scientific paper
IC 5146 is a star forming region in Cygnus, consisting of a young massive star cluster and lower mass regions that are just beginning to form stars. We present sub-mm observations of the low-mass northern streamer region of IC 5146. The dense cores in this region are thought to be pre-stellar and have been studied previously by SCUBA and molecular line observations. The new sub-mm observations were carried out during the 2005 flight of the Balloon-borne Large-Aperture Sub-millimeter Telescope (BLAST). The data are broadband images centered on 250, 350, and 500 μm. We combine the BLAST images with archival IRAS and Spitzer-MIPS observations to determine the spectral energy distributions (SEDs) of several point-like and diffuse sources in IC 5146. The SEDs reveal dust temperatures of roughly ˜14 K for both diffuse filaments and regions containing IRAS point sources and/or known protostars. We also present evidence for variations in the spatial distribution of grain temperatures in the region. These observations will allow us to constrain simple models of pre-stellar clouds and will support the upcoming Herschel, SPIRE Gould Belt Survey.
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