Structure of photodissociation fronts in star-forming regions revealed by Herschel observations of high-J CO emission lines

Context. In bright photodissociation regions (PDR) associated with massive star formation, the presence of dense “clumps” that are immersed in a less dense interclump medium is often proposed to explain the difficulty of models to account for the observed gas emission in high-excitation lines. Aims....

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Veröffentlicht in:	Astronomy and astrophysics (Berlin) 2018-07, Vol.615, p.A129
Hauptverfasser:	Joblin, C., Bron, E., Pinto, C., Pilleri, P., Le Petit, F., Gerin, M., Le Bourlot, J., Fuente, A., Berne, O., Goicoechea, J. R., Habart, E., Köhler, M., Teyssier, D., Nagy, Z., Montillaud, J., Vastel, C., Cernicharo, J., Röllig, M., Ossenkopf-Okada, V., Bergin, E. A.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomical models Astrophysics Clouds Clumps Computer simulation Constraint modelling Emission analysis Gas cooling Gas pressure ISM: individual objects: NGC 7023 ISM: individual objects: Orion Bar ISM: lines and bands Ladders Molecular clouds Molecular gases molecular processes Parameters Photodissociation photon-dominated region Physics Scaling factors Star & galaxy formation Star formation submillimeter: ISM Tracers Ultraviolet radiation
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