2000AJ....120.1954M

Query : 2000AJ....120.1954M

2000AJ....120.1954M - Astron. J., 120, 1954-1962 (2000/October-0)

Distribution of cold dust in Orion A and B.

MOOKERJEA B., GHOSH S.K., RENGARAJAN T.N., TANDON S.N. and VERMA R.P.

Abstract (from CDS):

Large-scale far-infrared (FIR) observations of the Orion complex at 205 and 138 µm are presented with the aim of studying the distribution of cold (<25 K) dust. The maps in these FIR bands extend over ∼3600 arcmin2 and cover regions around OMC-1, 2, and 3 in Orion A and NGC 2023 and NGC 2024 in Orion B. Some limited regions have also been mapped at 57 µm. A total of 15 sources in Orion A and 14 in Orion B (south) have been identified from our FIR maps. Dust temperature distribution in both Orion A and Orion B (south) have been determined reliably using the maps at 205 and 138 µm obtained from simultaneous observations using almost identical beams (1'.6 diameter). These temperatures have been used to generate the map of τ150, the optical depth at 150 µm, for the Orion B region. The coldest source detected is in OMC-3 and has temperature ∼15 K. The diffuse FIR emission in the different subregions is found to vary between 25% and 50% of the total FIR emission from that subregion.

Abstract Copyright: ∼

Journal keyword(s): Infrared Radiation - ISM: individual (OMC-1, OMC-2) - ISM: Individual: Alphanumeric: OMC-3 - ISM: Individual: NGC Number: NGC 2023 - ISM: Individual: NGC Number: NGC 2024

Nomenclature: Table 1: [MGR2000b] ANN (Nos A1-A13). Table 2: [MGR2000b] N (Nos 1-3). Table 3: [MGR2000b] BNN (Nos B1-B14).

Simbad objects: 73

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Number of rows : 73
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* EZ Ori Or* 05 34 18.5664045960 -05 04 47.807028228     12.00   10.76682 G4Ve 110 0
2 [MGR2000b] A1 FIR 05 34 19.4 -05 04 25           ~ 1 0
3 [MGR2000b] A2 FIR 05 34 30.0 -04 54 33           ~ 1 0
4 [MGR2000b] A3 FIR 05 34 32.2 -05 17 18           ~ 1 0
5 [MGR2000b] A4 FIR 05 34 39.5 -05 00 32           ~ 1 0
6 [MGR2000b] A5 FIR 05 35 00.3 -05 21 03           ~ 1 0
7 [MGR2000b] A6 FIR 05 35 11.7 -04 55 48           ~ 1 0
8 NGC 1977 OpC 05 35 12.7 -04 48 21           ~ 256 0
9 NAME OMC-1 MoC 05 35 14 -05 22.4           ~ 1249 2
10 [MGR2000a] IRAS 00494+5617 P1 HII 05 35 14.4 -04 55 45           ~ 39 0
11 [MGR2000b] 1 FIR 05 35 14.8 -05 22 34           ~ 1 0
12 [MGR2000b] A8 FIR 05 35 15.2 -05 22 58           ~ 1 0
13 [MGR2000b] A7 FIR 05 35 15.3 -04 56 40           ~ 1 0
14 2MASS J05351997-0501024 Y*O 05 35 19.97 -05 01 02.5           ~ 48 0
15 OMC 3 MoC 05 35 20.0 -05 01 00           ~ 301 1
16 V* V2364 Ori Or* 05 35 20.1517668048 -05 13 15.686399748   20.263 18.348   12.859 K5-M0e 62 0
17 HOY J053521.34-051319.5 cor 05 35 21.4 -05 13 14           ~ 31 0
18 [TSO2008] 35 Rad 05 35 21.66 -05 12 13.1           ~ 3 0
19 HOPS 88 Y*O 05 35 22.4451 -05 01 14.123           ~ 71 1
20 [MWZ90] OMC-2 FIR 6 IR 05 35 22.6 -05 12 37           ~ 25 0
21 [TSO2008] 34 IR 05 35 23.4 -05 12 36           ~ 13 0
22 ISOY J053523.33-051203.4 Y*O 05 35 23.417 -05 12 02.34           ~ 45 0
23 [MGR2000b] A9 FIR 05 35 23.5 -05 02 07           ~ 1 0
24 HOPS 87 Y*O 05 35 23.500 -05 01 29.58           ~ 123 0
25 HOPS 68 Y*O 05 35 24.2999 -05 08 30.686           ~ 67 0
26 NAME OMC-2 IRS 3 HII 05 35 26.00 -05 10 16.6           ~ 68 0
27 V* V2457 Ori Or* 05 35 26.97000 -05 09 54.4644         18.858 ~ 166 0
28 OMC 2 MoC 05 35 27 -05 10.1           ~ 475 1
29 [MGR2000b] A10 FIR 05 35 27.2 -05 12 33           ~ 1 0
30 2MASS J05352762-0509337 Y*O 05 35 27.622 -05 09 33.78           ~ 128 0
31 [MGR2000b] 2 FIR 05 35 27.8 -05 14 26           ~ 1 0
32 [MGR2000b] A11 FIR 05 35 29.1 -05 09 24           ~ 1 0
33 [MGR2000b] A12 FIR 05 35 29.3 -05 11 09           ~ 1 0
34 [MGR2000b] 3 FIR 05 35 30.8 -05 19 54           ~ 1 0
35 M 43 HII 05 35 31 -05 16.2           ~ 201 0
36 [MGR2000b] A13 FIR 05 35 35.0 -04 59 57           ~ 1 0
37 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
38 IRAS 05383-0150 MIR 05 40 49.29192 -01 49 35.9796           ~ 3 0
39 [MGR2000b] B1 FIR 05 40 53.0 -01 48 50           ~ 1 0
40 [MGR2000b] B2 FIR 05 40 53.4 -01 52 55           ~ 1 0
41 NAME Horsehead Nebula DNe 05 40 59.0 -02 27 30           ~ 555 0
42 LBS 2-40 PoC 05 41 10.1 -01 48 10           ~ 3 0
43 [LMH96] LBS 40 SM smm 05 41 12.6 -01 48 02           ~ 2 0
44 [MGR2000b] B3 FIR 05 41 14.6 -01 48 28           ~ 1 0
45 [MGR2000b] B4 FIR 05 41 15.9 -01 57 17           ~ 1 0
46 IRAS 05387-0149 IR 05 41 19.3 -01 47 33           ~ 9 0
47 IRAS 05388-0147 Cld 05 41 24.0 -01 45 51           ~ 6 1
48 [MGR2000b] B5 FIR 05 41 24.3 -01 44 43           ~ 1 0
49 LBS 2-36 PoC 05 41 26.1 -01 48 11           ~ 5 0
50 [MGR2000b] B6 FIR 05 41 28.7 -01 52 34           ~ 1 0
51 [MGR2000b] B7 FIR 05 41 31.0 -01 46 26           ~ 1 0
52 [MGR2000b] B13 FIR 05 41 33.9 -02 18 50           ~ 1 0
53 IRAS 05391-0152 HII 05 41 37 -01 50.7           ~ 20 0
54 NGC 2023 RNe 05 41 37.9 -02 15 52           ~ 657 1
55 HD 37903 Em* 05 41 38.3891026008 -02 15 32.479650720 7.32 7.94 7.83 7.64 7.52 B3IV 385 0
56 [MGR2000b] B8 FIR 05 41 40.0 -01 50 47           ~ 1 0
57 [LMH96] LBS 34 SM smm 05 41 41.0 -02 17 25           ~ 2 0
58 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1498 0
59 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1198 1
60 [LMH96] LBS 33 SM smm 05 41 44.5 -01 55 43           ~ 2 0
61 [MGR2000b] B9 FIR 05 41 45.2 -01 55 27           ~ 1 0
62 [MGR2000b] B14 FIR 05 41 45.6 -02 17 43           ~ 1 0
63 IRAS 05393-0156 HII 05 41 45.9 -01 54 32           ~ 38 0
64 IRAS 05392-0145 IR 05 41 46.9 -01 44 21           ~ 6 0
65 LBS 2-34 PoC 05 41 47.1 -02 17 17           ~ 3 0
66 IRAS 05393-0150 IR 05 41 52.45 -01 48 59.7           ~ 5 0
67 [KSP2003] J054152.70-014421.2 FIR 05 41 52.70 -01 44 21.2           ~ 2 0
68 [MGR2000b] B11 FIR 05 41 53.4 -01 47 48           ~ 1 0
69 [MGR2000b] B12 FIR 05 41 59.9 -02 00 12           ~ 1 0
70 LDN 1630 DNe 05 45.5 -00 59           ~ 392 0
71 M 78 RNe 05 46 45.8 +00 04 45   8.0       ~ 397 0
72 NGC 2071 RNe 05 47 10 +00 18.0           ~ 661 1
73 LBS 2-33 PoC ~ ~           ~ 4 0

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