2019AJ....157...20O


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.19CEST14:44:55

2019AJ....157...20O - Astron. J., 157, 20-20 (2019/January-0)

SMA line observations of the CH3OH-maser outflow in DR21(OH).

OROZCO-AGUILERA M.T., HERNANDEZ-GOMEZ A. and ZAPATA L.A.

Abstract (from CDS):

We present a (sub)millimeter line survey of the methanol maser outflow located in the massive star-forming region DR21(OH) carried out with the Submillimeter Array (SMA) at 217/227 GHz and 337/347 GHz. We find transitions from several molecules toward the maser outflow such as CH3OH, H2CS, C17O, H13CO+, and C34S. However, with the present observations, we cannot discard the possibility that some of the observed species such as C17O, C34S, and H2CS, might be instead associated with the compact and dusty continuum sources located in the MM2 region. Given that most of transitions correspond to methanol lines, we have computed a rotational diagram with CASSIS and an LTE synthetic spectra with XCLASS for the detected methanol lines in order to estimate the rotational temperature and column density in the small solid angle of the outflow where enough lines are present. We obtain a rotational temperature of 28 ± 2.5 K and a column density of 6.0 ± 0.9 x 1015 cm–2. These values are comparable to those column densities/rotational temperatures reported in outflows emanating from low-mass stars. Extreme and moderate physical conditions to excite the maser and thermal emission coexist within the CH3OH flow. Finally, we do not detect any complex molecules associated with the flow, e.g., CH3OCHO, (CH3)2CO, and CH3CH2CN.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): circumstellar matter - ISM: jets and outflows - ISM: individual objects: DR21(OH - ISM: molecules

CDS comments: Figure 1: source IRS1 not identified (not enough information).

Simbad objects: 22

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Number of rows : 22

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 [HKM99] B1-b cor 03 33 20.32 +31 07 21.5           ~ 172 0
2 NAME HH 114 MMS smm 05 18 15.24 +07 12 02.7           ~ 11 0
3 * zet Ori ** 05 40 45.52666 -01 56 33.2649 0.50 1.56 1.77 1.85 2.05 O9.7Ib+B0III 334 0
4 BHR 71 MoC 12 01 36.810 -65 08 49.22           ~ 121 0
5 [KVV2010] SMM4-W out 18 29 11.60 +01 13 18.1           ~ 8 0
6 IRAS 20126+4104 Y*O 20 14 25.8816186803 +41 13 36.869078243           B2.5-B0.5 403 0
7 NAME Cyg X Cld 20 28 41 +41 10.2           ~ 648 1
8 NAME DR 21(OH) MM 2 Mas 20 39 00.4 +42 22 44           ~ 39 0
9 [ZLS2012] SMA1 mm 20 39 00.400 +42 22 46.60           ~ 4 0
10 [ZLS2012] SMA2 mm 20 39 00.406 +42 22 46.78           ~ 3 0
11 [ZLS2012] SMA3 mm 20 39 00.453 +42 22 44.86           ~ 3 0
12 [ZLS2012] SMA4 mm 20 39 00.598 +42 22 44.94           ~ 3 0
13 [ZLS2012] SMA6 mm 20 39 01.002 +42 22 48.93           ~ 5 0
14 [ZLS2012] SMA5 mm 20 39 01.010 +42 22 48.72           ~ 4 0
15 [MBS2007c] CygX-N44 Rad 20 39 01.01 +42 22 50.2           ~ 365 0
16 [ZLS2012] SMA7 mm 20 39 01.079 +42 22 49.06           ~ 6 0
17 NAME DR 21(OH) MM 1 Mas 20 39 01.1 +42 22 49           ~ 41 0
18 [ZLS2012] SMA8 mm 20 39 01.192 +42 22 51.26           ~ 3 0
19 [ZLS2012] SMA9 mm 20 39 01.231 +42 22 51.43           ~ 3 0
20 LDN 1157 DNe 20 39 06.4 +68 02 13           ~ 505 0
21 NAME BL Lac BLL 22 02 43.2913773726 +42 16 39.978417860   15.66 14.72     ~ 2040 1
22 3C 454.3 Bla 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2566 2

    Equat.    Gal    SGal    Ecl

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2021.04.19-14:44:55

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