2010ApJ...716..893P


Query : 2010ApJ...716..893P

2010ApJ...716..893P - Astrophys. J., 716, 893-906 (2010/June-3)

Magnetic field structures and turbulent components in the star-forming molecular clouds OMC-2 and OMC-3.

POIDEVIN F., BASTIEN P. and MATTHEWS B.C.

Abstract (from CDS):

The SCUBA polarized 850 µm thermal emission data of the OMC-2 region in Orion A are added to and homogeneously reduced with data already available in the OMC-3 region. The data set shows that OMC-2 is a region generally less polarized than OMC-3. Where coincident, most of the 850 µm polarization pattern is similar to that measured in 350 µm polarization data. Only 850 µm polarimetry data have been obtained in and around MMS7, FIR1 and FIR2, and in the region south of FIR6. A realignment of the polarization vectors with the filament can be seen near FIR1 in the region south of OMC-3. An analysis shows that the energy injected by CO outflows and H2 jets associated with OMC-2 and OMC-3 does not appear to alter the polarization patterns at a scale of the 14'' resolution beam. A second-order structure function analysis of the polarization position angles shows that OMC-2 is a more turbulent region than OMC-3. OMC-3 appears to be a clear case of a magnetically dominated region with respect to the turbulence. However, for OMC-2 it is not clear that this is the case. A more in-depth analysis of five regions displayed along OMC-2/3 indicates a decrease of the mean polarization degree and an increase of the turbulent angular dispersion from north to south. A statistical analysis suggests the presence of two depolarization regimes in our maps: one regime including the effects of the cores, the other one excluding it.

Abstract Copyright:

Journal keyword(s): ISM: individual (OMC-2, OMC-3) - ISM: jets and outflows - magnetic fields - polarization - turbulence

VizieR on-line data: <Available at CDS (J/ApJ/716/893): table2.dat table3.dat>

Nomenclature: Fig. 1, Paragr. 3.1.5: [CRW97] OMC-3 MMS NN (No. 11) added.

Simbad objects: 42

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Number of rows : 42
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 [JCC87] IRAS 4A Y*O 03 29 10.49 +31 13 30.8           ~ 680 1
2 [JCC87] IRAS 4 FIR 03 29 10.9 +31 13 26           ~ 475 0
3 [JCC87] IRAS 4B Y*O 03 29 12.058 +31 13 02.05           ~ 587 0
4 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4050 0
5 NAME f-Shaped Filament in Orion Cld 05 35.0 -05 30           ~ 100 0
6 M 42 HII 05 35 01.5 -05 26 24           ~ 3953 0
7 NAME OMC-1 MoC 05 35 14 -05 22.4           ~ 1121 2
8 [CRW97] OMC-3 MMS 1 Y*O 05 35 18.030 -05 00 17.77           ~ 21 0
9 [TUK93] 3 Y*O 05 35 18.32712 -05 00 32.9400           ~ 69 2
10 HOPS 91 Y*O 05 35 18.98 -05 00 51.6           ~ 37 0
11 OMC 3 MoC 05 35 20.0 -05 01 00           ~ 254 1
12 HOY J053521.34-051319.5 cor 05 35 21.4 -05 13 14           ~ 29 0
13 HOPS 88 Y*O 05 35 22.4451 -05 01 14.123           ~ 58 1
14 [MWZ90] OMC-2 FIR 6 IR 05 35 22.6 -05 12 37           ~ 21 0
15 [SMZ2002] Outflow 23 PoC 05 35 22.8 -05 11 50           ~ 3 0
16 [SMZ2002] Outflow 24 PoC 05 35 23.3 -05 12 03           ~ 3 0
17 2MASS J05352332-0507096 Y*O 05 35 23.326 -05 07 09.66           ~ 19 0
18 [TSO2008] 23 IR 05 35 23.4 -05 07 32           ~ 14 0
19 [SMZ2002] Outflow 4 PoC 05 35 23.4 -05 01 31           ~ 3 0
20 HOPS 87 Y*O 05 35 23.500 -05 01 29.58           ~ 88 0
21 HOPS 68 Y*O 05 35 24.2999 -05 08 30.686           ~ 58 0
22 [TSO2008] 24 Y*? 05 35 24.6 -05 07 53           ~ 25 0
23 NAME OMC-2 IRS 3 HII 05 35 26.00 -05 10 16.6           ~ 64 0
24 [TSO2008] 18 mm 05 35 26.0 -05 05 42           ~ 42 1
25 JCMTSE J053526.4-050521 cor 05 35 26.5 -05 05 17           ~ 27 1
26 [SMZ2002] Outflow 19 PoC 05 35 26.7 -05 09 24           ~ 3 0
27 IRAS 05329-0505 Y*O 05 35 26.746 -05 03 55.08           ~ 85 0
28 V* V2457 Ori Or* 05 35 26.97000 -05 09 54.4644         18.858 ~ 142 0
29 OMC 2 MoC 05 35 27 -05 10.1           ~ 433 1
30 [SMZ2002] Outflow 21 PoC 05 35 27.2 -05 11 11           ~ 3 0
31 [SMZ2002] Outflow 17 PoC 05 35 27.5 -05 09 37           ~ 3 0
32 [SMZ2002] Outflow 18 PoC 05 35 27.5 -05 09 17           ~ 3 0
33 2MASS J05352762-0509337 Y*O 05 35 27.622 -05 09 33.78           ~ 89 0
34 [SMZ2002] Outflow 14 PoC 05 35 28.1 -05 07 20           ~ 3 0
35 [CRW97] OMC-3 MMS 10 cor 05 35 31.91 -05 05 51.1           ~ 29 0
36 NAME Ori A MoC 05 38 -07.1           ~ 2881 0
37 NAME the Pipe Nebula DNe 17 30 -25.0           ~ 375 1
38 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13314 0
39 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1567 0
40 GRS G081.70 +00.50 SFR 20 39 01.6 +42 19 38           O4.5 1016 0
41 SH 2-140 OpC 22 19 07.8 +63 17 07           ~ 649 2
42 IRAS 22176+6303 Y*O 22 19 17.978 +63 18 52.92           ~ 591 0

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2022.12.01-08:53:51

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