HERSCHEL/PACS SPECTROSCOPIC SURVEY OF PROTOSTARS IN ORION: THE ORIGIN OF FAR-INFRARED CO EMISSION

We present far-infrared (57-196 mu m) spectra of 21 protostars in the Orion molecular clouds. These were obtained with the Photo-detector Array Camera and Spectrometer (PACS) on board the Herschel Space observatory as part of the Herschel Orion Protostar Survey program. We analyzed the emission line...

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Bibliographic Details
Published in:	The Astrophysical journal Vol. 763; no. 2; pp. 1 - 26
Main Authors:	Manoj, P, Watson, D M, Neufeld, D A, Megeath, S T, Vavrek, R, Yu, Vincent, Visser, R, Bergin, E A, Fischer, W J, Tobin, J J
Format:	Journal Article
Language:	English
Published:	United States 01-02-2013
Subjects:	Arrays ASTROPHYSICS, COSMOLOGY AND ASTRONOMY BOLOMETERS CARBON MONOXIDE CLOUDS Cobalt DENSITY EMISSION Holes HYDROGEN LUMINOSITY Outflow PHOTOLYSIS PROTOSTARS QUANTUM NUMBERS Rotational SPECTRA Spectrometers STARS TEMPERATURE DISTRIBUTION TEMPERATURE RANGE 1000-4000 K
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Summary:	We present far-infrared (57-196 mu m) spectra of 21 protostars in the Orion molecular clouds. These were obtained with the Photo-detector Array Camera and Spectrometer (PACS) on board the Herschel Space observatory as part of the Herschel Orion Protostar Survey program. We analyzed the emission lines from rotational transitions of CO, involving rotational quantum numbers in the range J[subup] = 14-46, using PACS spectra extracted within a projected distance of 2000 AU centered on the protostar. Post-shock gas at the densities is more likely to be found within the outflow cavities along the molecular outflow or along the cavity walls at radii several 100-1000 AU.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0004-637X 1538-4357
DOI:	10.1088/0004-637X/763/2/83