High spatial resolution observations of H_2_ vibrational fluorescence in NGC 2023

Details High spatial resolution observations of H_2_ vibrational fluorescence in NGC 2023 High spatial resolution observations of H_2_ vibrational fluorescence in NGC 2023

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...286..909f&link_type=abstract

Astronomy and Astrophysics 286, 909-914 (1994)

Astronomy and Astrophysics

Astrophysics

29

Ism: Individual Objects: Ngc 2023, Ism: Reflection Nebulae, Ism: Molecules, Molecular Processes, Infrared: Ism: Lines

Scientific paper

Using the Canada-France-Hawaii telescope, we have obtained a ~1" spatial resolution image of vibrationally excited H_2_ at 2.121μm. The image shows narrow filamentary structure with striking spatial correlations, but also anti-correlations, with the filamentary structure of extended red emission (ERE), with implications for the mechanism of ERE. Comparison is also made with earlier lower resolution observations at 2.121μm and with 3.3μm continuum emission. On the basis of the VUV excitation mechanism of H_2_ vibrational fluorescence and the filamentary nature of the H_2_ emission, it is proposed that the surface of the illuminated cloud is characterized by a series of undulations, traced by the emission.

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