The molecular gas behaviour in Kleinmann-Low nebula

Details The molecular gas behaviour in Kleinmann-Low nebula The molecular gas behaviour in Kleinmann-Low nebula

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.577..489c&link_type=abstract

In: Proceedings of the dusty and molecular universe: a prelude to Herschel and ALMA, 27-29 October 2004, Paris, France. Ed. by A

Computer Science

Ism: Molecules, Ism: Kinematics And Dynamics, Infrared: Ism, Ism: Jets And Outflows

Scientific paper

We detect and study the excited molecular hydrogen in the Orion's Kleinmann-Low nebula. Emission lines in the K-band are used to explore the general state of the gas. The comparison of the observed relative intensities of the lines with those calculated using models involving H2 excitation processes has been used to deduce the dominating excitation process in this region. For this purpose a general study has been performed on the H2 line formation in J- and C-type shock waves as well as in photon dominated regions (PDRs) for prominent lines detected in the 1.9-2.5 μm range. It is shown in particular that our observations may be consistent with J-type shock waves but not with C-type ones, while PDR excitation could also be invoked, in contradiction with most of the previous works. These results are explained in terms of magnetic field and general gas properties.

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