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| EPoS Contribution |
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Deeply embedded populations and thermal emission from IRDCs - the
Herschel view
Hendrik Linz Max-Planck-Institut für Astronomie, Heidelberg, Germany | |
| Infrared Dark Clouds (IRDCs) have gained the attention in recent year as one of the earliest manifestations of regions capable of forming high-mass stars. Previous investigations could establish the existence of mid-infrared sources within the otherwise infrared-dark regions. But their relation with the commonly found extended (sub-)millimeter emission from these IRDCs remained ambiguous, which affects a proper modelling of these regions. Within our Herschel programme EPOS we have targetted several IRDCs. Due to the sensitivity and, in particular, their unprecedented spatial resolution in the far-infrared, the Herschel data reveal the full detail of the IRDC interior. In the talk we will show that the embedded IRDC population can be traced now over a large wavelength range. Hence, much more accurate SEDs can be constructed for these potential seeds of star formation, since identification ambiguities are finally resolved. We show examples for Herschel compact objects not visible yet at 24 micron, and for extinction silhouettes at 70 and 100 micron. Together with existing auxiliary data such as molecular line maps we assess the state of star formation in these IRDCs. | |
| Collaborators: O. Krause, MPIA, Germany Th. Henning, MPIA, Germany H. Beuther, MPIA, Germany M. Nielbock, MPIA, Germany T. Vasyunina, MPIA, Germany A. Stutz, MPIA, Germany B. Stecklum, TLS, Germany J. Steinacker, LERMA/MPIA, France/Germany |
Suggested Session:
Herschel |