SIMBAD references

2003A&A...412..727K - Astronomy and Astrophysics, volume 412, 727-734 (2003/12-4)

H2 excitation imaging of the Orion Molecular Cloud.

KRISTENSEN L.E., GUSTAFSSON M., FIELD D., CALLEJO G., LEMAIRE J.L., VANNIER L. and PINEAU DES FORETS G.

Abstract (from CDS):

Observations are reported of IR emission in H2, around 2µm in the K-band, obtained with the ESO 3.6m telescope using the ADONIS adaptive optics system. Data cover a region of the Orion Molecular Cloud north of the Trapezium stars and SW of the Becklin-Neugebauer object. Excellent seeing yielded diffraction limited images in the v=2-1 S(1) line at 2.247µm. Excitation temperature images were created by combining these data with similar data for H2 emission in the v=1-0 S(1) line reported earlier (Vannier et al., 2001A&A...366..651V). Shock models are used to estimate densities in emitting clumps of material. In local zones with high excitation temperatures, post-shock densities are found to be as high as several times 108/cm3, an order of magnitude denser than our previous estimates. We propose that the nature of these zones is dictated by the combined activity of shocks, which create dense structures, and the powerful radiation field of θ1C Ori which photoevaporates the boundaries of these structures.

Abstract Copyright:

Journal keyword(s): ISM: individual objects: OMC 1 - ISM: kinematics and dynamics - ISM: molecules - shock waves - ISM: lines and bands

Simbad objects: 14

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2020.08.10-02:58:02

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