Gas and Dust in the Orion Bar

¹ Institut d’Astrophysique Spatiale, CNRS/Université Paris-Sud 11, Orsay, France
² Spitzer Science Center, California Institute of Technology, 1200 East California Bd., MC 314-6, Pasadena, CA 91125, USA

Abstract

We use the DustEM model coupled with a radiative transfer code to fit the Herschel and Spitzer emission of the Orion Bar. The thermal dust emission at the 250-μm peak position is well reproduced but we overestimate the stochastically heated grain emission. The dust model parameters are checked with the Meudon PDR code and are consistent with the spectroscopic data from the SPIRE FTS.