2007AJ....133.1012V


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.19CEST14:41:27

2007AJ....133.1012V - Astron. J., 133, 1012-1026 (2007/March-0)

OMC-1: a cool arching filament in a hot gaseous cavity: geometry, kinematics, magnetic vectors, and pressure balance.

VALLEE J.P. and FIEGE J.D.

Abstract (from CDS):

We have assembled data on large (Galactic shell), middle (filament), and small (protostar) scales. OMC-1 is embedded in a hot cavity. Here we have made multiconstituent (gas/dust/field) homogeneous maps of the central part of the OMC-1 filament, covering an area of 2'x2'. We find here that the vertical filament has a turbulent pressure about equal to the magnetic pressure; its total pressure roughly equals that in the surrounding medium. The magnetic field crosses the filament with an estimated strength of 300-350 µG in the sky plane. It could be an ``externally wrapped'' U-shaped magnetic field going around the filament (due to a large shock front traveling in the cavity), or else an internally generated ``helical'' field (of unknown origin). Near the OMC-1 map center, we map the low-velocity outflow near IRc2-source I, with a pattern of blue south-southwest gas and red north-northeast gas. Our James Clerk Maxwell Telescope data yield a plane-of-sky field of 2.4-2.6 mG across the outflow; this strength nearly equals the published Zeeman line-of-sight data. Farther out, the Zeeman data show a negative magnetic field, possibly suggesting a pole-on dipolar field.

Abstract Copyright:

Journal keyword(s): ISM: Dust, Extinction - Infrared: ISM - ISM: Magnetic Fields - Polarization - Stars: Formation

Simbad objects: 19

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Number of rows : 19

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Eri Bubble HI 03 52 -02.0           ~ 93 0
2 NAME OMC-1 MoC 05 35 14 -05 22.4           ~ 1051 2
3 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2065 1
4 [RLK73] IRc 2d IR 05 35 14.45 -05 22 29.9           ~ 19 0
5 [RLK73] IRc 2b IR 05 35 14.473 -05 22 29.61           ~ 20 0
6 NAME OMC 1S PoC 05 35 14.5 -05 25 49           ~ 71 1
7 NAME OMC 1N PoC 05 35 14.5 -05 22 07           ~ 16 1
8 [RLK73] IRc 2a Y*O 05 35 14.511 -05 22 30.40           ~ 112 0
9 [RLK73] IRc 2 IR 05 35 14.51548 -05 22 30.5943           ~ 591 1
10 OMC 3 MoC 05 35 20.0 -05 01 00           ~ 234 1
11 OMC 2 MoC 05 35 27 -05 10.1           ~ 404 1
12 OMC 4 MoC 05 36 06 -05 35.7           ~ 54 0
13 NAME Gal Anticenter reg 05 46 +28.9           ~ 757 0
14 NGC 2071 RNe 05 47 10 +00 18.0           ~ 615 1
15 NAME ORI MOL CLOUD MoC 05 56 -01.8           ~ 899 1
16 NAME Vela Supershell sh 07 40 -22.           ~ 25 0
17 SH 2-106 HII 20 27 26.8 +37 22 49           ~ 415 2
18 [MBS2007c] CygX-N44 Rad 20 39 01.01 +42 22 50.2           ~ 365 0
19 NAME Orion's Veil HI ~ ~           ~ 38 0

    Equat.    Gal    SGal    Ecl

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2021.04.19-14:41:27

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