SIMBAD references

1998A&A...333..280F - Astronomy and Astrophysics, volume 333, 280-286 (1998/5-1)

New observations of H2 vibrational fluorescence in NGC 2023.

FIELD D., LEMAIRE J.L., PINEAU DES FORETS G., GERIN M., LEACH S., ROSTAS F. and ROUAN D.

Abstract (from CDS):

The Canada-France-Hawaii Telescope has been used to obtain images of NGC 2023 in the 1-0 S(1) and 1-0 S(2) lines of vibrationally excited H2 at 2.121µm and 2.033µm, respectively, at a spatial resolution of 0.8". Images show the presence of widespread emission exhibiting structure on a milliparsec scale. Using the latest estimates of the VUV field of the exciting star HD 37903, steady-state photodissociation region (PDR) models are able to reproduce the brightness of the observed emission with good accuracy, showing that the number density in the emitting region is ≃105cm–3.

Abstract Copyright: ∼

Journal keyword(s): ISM: individual objects: NGC 2023 - reflection nebulae - molecules - molecular processes - infrared: ISM: lines - continuum

CDS comments: Regions in t.1 and stars C, E in fig.3 not in SIMBAD. Objects HHN = [MOW87] NGC 2023 HHN

Simbad objects: 12

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