Protostars and Planets VI, Heidelberg, July 15-20, 2013

Poster 1S033

B68 - The HERSCHEL view: Dust temperatures and densities

Nielbock, Markus (MPIA, Heidelberg, Germany)
Launhardt, Ralf (MPIA, Heidelberg, Germany)
Steinacker, Jürgen (IPAG, University of Grenoble, France)
Stutz, Amelia M. (MPIA, Heidelberg, Germany)
Balog, Zoltan (MPIA, Heidelberg, Germany)
Beuther, Henrik (MPIA, Heidelberg, Germany)
Bouwman, Jeroen (MPIA, Heidelberg, Germany)
Henning, Thomas (MPIA, Heidelberg, Germany)
Hily-Blant, Pierre (IPAG, University of Grenoble, France)
Kainulainen, Jouni (MPIA, Heidelberg, Germany)
Krause, Oliver (MPIA, Heidelberg, Germany)
Linz, Hendrik (MPIA, Heidelberg, Germany)
Lippok, Nils (MPIA, Heidelberg, Germany)
Ragan, Sarah (MPIA, Heidelberg, Germany)
Risacher, Christophe (MPIfR, Bonn, Germany)
Schmiedeke, Annika (University of Cologne, Germany)

We have used HERSCHEL PACS and SPIRE continuum maps to derive the distribution of dust temperatures and densities of the pre-stellar core B68. For this, we employed a ray-tracing algorithm together with an empirical function to fit the radial density distribution. We find radial dust temperature and density gradients with the dust temperature ranging from 8 K in the centre to a mean value of 17 K at the edge indicating external heating. The density peaks at 3.4 x 10^5 cm^-3 in the centre and blends in with the ambient material at 4.4 x 10^2 cm^-3. The slope of the mean radial density profile is n_H ~ r^-3.5, which is largely inconsistent with previous Bonnor-Ebert fits and steeper than predicted by the models of the inside-out collapse of pre-stellar cores, but is consistent with a relation to filamentary structures or pressure confined cores.

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