2003A&A...412..727K


Query : 2003A&A...412..727K

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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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME OMC-1 MoC 05 35 14 -05 22.4           ~ 1103 2
2 V* V2254 Ori Or* 05 35 14.11296 -05 22 22.7316           B 303 2
3 [RLK73] IRc 2 IR 05 35 14.51548 -05 22 30.5943           ~ 608 1
4 V* V1330 Ori BY* 05 35 14.9155657944 -05 22 39.203240880   15.040 13.940   11.632 K4 70 0
5 NAME Orion Peak 2 PoC 05 35 15.74 -05 22 39.9           ~ 21 0
6 * tet01 Ori A Ae* 05 35 15.8254015008 -05 23 14.334699480 5.87 6.75 6.73 6.42 6.21 B0V 469 1
7 COUP 742 * 05 35 15.8374571424 -05 22 45.841540404     16.466   13.432 M3e 36 0
8 COUP 776 * 05 35 16.1905641000 -05 22 37.462107504     18.99   14.822 M3.5 28 0
9 * tet01 Ori C SB* 05 35 16.4662967280 -05 23 22.921811880 4.20 5.15 5.13 4.91 4.73 O7Vp 1342 1
10 * tet01 Ori D Y*O 05 35 17.2574479992 -05 23 16.570738104 6.08 6.79 6.70 6.40 6.20 B1.5Vp 314 0
11 M 42 HII 05 35 17.3 -05 23 28           ~ 3900 0
12 NAME Ori A MoC 05 38 -07.1           ~ 2841 0
13 NAME ORI MOL CLOUD MoC 05 56 -01.8           ~ 955 1
14 HD 71264 * 08 26 18.1522043376 -05 51 49.831718400   8.96 8.83     A0V 9 0

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2022.05.20-01:05:21

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