2009ApJ...698.1321A


C.D.S. - SIMBAD4 rel 1.7 - 2020.06.02CEST04:45:19

2009ApJ...698.1321A - Astrophys. J., 698, 1321-1329 (2009/June-3)

Radio continuum and methanol observations of DR21(OH).

ARAYA E.D., KURTZ S., HOFNER P. and LINZ H.

Abstract (from CDS):

We report high-sensitivity subarcsecond angular resolution observations of the massive star-forming region DR21(OH) at 3.6, 1.3, and 0.7 cm obtained with the Very Large Array. In addition, we conducted observations of CH3OH 44 GHz masers. We detected more than 30 new maser components in the DR21(OH) region. Most of the masers appear to trace a sequence of bow shocks in a bipolar outflow. The centimeter continuum observations reveal a cluster of radio sources; the strongest emission is found toward the molecular core MM1. The radio sources in MM1 are located about 5'' north of the symmetry center of the CH3 OH outflow, and therefore they are unlikely to be associated with the outflow. Instead, the driving source of the outflow is likely located in the MM2 core. Although based on circumstantial evidence, the radio continuum from MM1 appears to trace free-free emission from shock-ionized gas in a jet. The orientation of the putative jet in MM1 is approximately parallel to the CH3 OH outflow and almost perpendicular to the large-scale molecular filament that connects DR21 and DR21(OH). This suggests that the (accretion) disks associated with the outflows/jets in the DR21-DR21(OH) region have symmetry axes mostly perpendicular to the filament.

Abstract Copyright:

Journal keyword(s): H II regions - ISM: individual: DR21(OH) - ISM: molecules - masers - stars: formation

Nomenclature: Table 3: [AKH2009] DR 21(OH) MM1-WW (Nos NW, SE), [AKH2009] DR 21(OH)-RN (Nos R1-R6).

Simbad objects: 33

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Number of rows : 33

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2483 2
2 * tet01 Ori A Ae* 05 35 15.8252169327 -05 23 14.332546552 5.87 6.75 6.73 6.42 6.21 B0V 457 1
3 NAME SH 2-233 IR Cl* 05 39 10.4 +35 45 19           ~ 93 0
4 IRAS 05358+3543 mul 05 39 10.4 +35 45 19           ~ 134 1
5 GAL 192.16-03.82 HII 05 58 13.4 +16 32 00           ~ 134 1
6 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5303 1
7 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3699 1
8 2MASS J18191220-2047297 Y*O 18 19 12.21 -20 47 29.7           B1 123 0
9 IRAS 18449-0115 cor 18 47 34.4947 -01 12 40.269           ~ 307 0
10 QSO B2005+40 QSO 20 07 44.9443187008 +40 29 48.601470737   18.5 19 20.3   ~ 266 1
11 IRAS 20126+4104 Y*O 20 14 25.8816186803 +41 13 36.869078243           B2.5-B0.5 394 0
12 NAME Cyg X Cld 20 28 41 +41 10.2           ~ 613 1
13 [DKS2007] B 7-1 IR 20 38 58.0 +42 22 51           ~ 2 0
14 NAME DR 21(OH) W PoC 20 38 58.8 +42 22 20           ~ 14 0
15 NAME DR 21(OH) N PoC 20 38 59.9 +42 23 33           ~ 18 0
16 NAME DR 21(OH) MM 2 Mas 20 39 00.4 +42 22 44           ~ 39 0
17 2MASS J20390047+4224369 ERO 20 39 00.48 +42 24 37.0           ~ 9 0
18 [AKH2009] DR 21(OH)-R1 Rad 20 39 00.606 +42 22 43.45           ~ 1 0
19 [AKH2009] DR 21(OH) MM1-NW Rad 20 39 00.9765 +42 22 48.981           ~ 1 0
20 NAME DR 21(OH) M Rad 20 39 01 +42 29.8           ~ 84 0
21 [AKH2009] DR 21(OH) MM1-SE Rad 20 39 01.0079 +42 22 48.695           ~ 1 0
22 [MBS2007c] CygX-N44 Rad 20 39 01.01 +42 22 50.2           ~ 362 0
23 [AKH2009] DR 21(OH)-R2 Rad 20 39 01.045 +42 22 48.91           ~ 1 0
24 [AKH2009] DR 21(OH)-R3 Rad 20 39 01.054 +42 22 48.43           ~ 1 0
25 [AKH2009] DR 21(OH)-R4 Rad 20 39 01.077 +42 22 48.32           ~ 1 0
26 NAME DR 21(OH) S PoC 20 39 01.1 +42 22 12           ~ 19 0
27 NAME DR 21(OH) MM 1 Mas 20 39 01.1 +42 22 49           ~ 41 0
28 [AKH2009] DR 21(OH)-R5 Rad 20 39 01.308 +42 22 49.05           ~ 1 0
29 [AKH2009] DR 21(OH)-R6 Rad 20 39 01.343 +42 22 51.98           ~ 1 0
30 GRS G081.70 +00.50 SFR 20 39 01.6 +42 19 38           O4.5 941 0
31 NAME Cyg X FIR 36 Rad 20 39 01.6 +42 22 47           ~ 107 1
32 [DKS2007] B 5-1 IR 20 39 04.5 +42 22 44           ~ 2 0
33 NAME Cepheus A SFR 22 56 17.9 +62 01 49           ~ 695 2

    Equat.    Gal    SGal    Ecl

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2020.06.02-04:45:19

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