Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010sf2a.conf..233m&link_type=abstract
SF2A-2010: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics. Eds.: S. Boissier, M. Heydari-
Astronomy and Astrophysics
Astrophysics
Ism: Clouds, Galaxy: Disk, Infrared: Ism
Scientific paper
Dust properties in molecular clouds may give clues to the star formation process.By using recent observations of dust and gas emission, we seek to constrain the dust properties in discrete molecular clumps in the plane of the Milky Way.Using observations of the interstellar gas, we separate observed dust emission from the Hi-GAL survey, using the Herschel Space Observatory, into discrete line of sight components. A new dust spectral inversion technique is used where the dust emission is assumed to be a linear sum of a finite number of components, where the emission from each component follows a modified blackbody emission law. We are able to obtain the dust properties in over 60 molecular clumps in a 4 square degree zone centred on l=30o, b=0o. The dust in a few of the molecular clumps is found to be warmer than the dust associated with the atomic phase of the gas. This suggests that these clumps are not heated solely by the interstellar radiation field, but also contain an internal heating source suggesting the onset of an initial stage of star formation.
Anderson Lauren
Bernard J.-Ph.
Brunt Christopher
Marshall Douglas J.
Martin Pamela
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