2019A&A...626A.132M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST03:58:58

2019A&A...626A.132M - Astronomy and Astrophysics, volume 626A, 132-132 (2019/6-1)

Molecular analysis of a high-mass prestellar core candidate in W43-MM1.

MOLET J., BROUILLET N., NONY T., GUSDORF A., MOTTE F., DESPOIS D., LOUVET F., BONTEMPS S. and HERPIN F.

Abstract (from CDS):


Context. High-mass analogues of low-mass prestellar cores are searched for to constrain the models of high-mass star formation. Several high-mass cores, at various evolutionary stages, have been recently identified towards the massive star-forming region W43-MM1 and amongst them a high-mass prestellar core candidate.
Aims. We aim to characterise the chemistry in this high-mass prestellar core candidate, referred to as W43-MM1 core #6, and its environment.
Methods. Using ALMA high-spatial resolution data of W43-MM1, we have studied the molecular content of core #6 and a neighbouring high-mass protostellar core, referred to as #3, which is similar in size and mass to core #6. We first subtracted the continuum emission using a method based on the density distribution of the intensities on each pixel. Then, from the distribution of detected molecules, we identified the molecules centred on the prestellar core candidate (core #6) and those associated to shocks related to outflows and filament formation. Then we constrained the column densities and temperatures of the molecules detected towards the two cores.
Results. While core #3 appears to contain a hot core with a temperature of about 190K, core #6 seems to have a lower temperature in the range from 20 to 90K from a rotational diagram analysis. We have considered different source sizes for core #6 and the comparison of the abundances of the detected molecules towards the core with various interstellar sources shows that it is compatible with a core of size 1000 au with T=20-90K or a core of size 500 au with T∼80K.
Conclusions. Core #6 of W43-MM1 remains one of the best high-mass prestellar core candidates even if we cannot exclude that it is at the very beginning of the protostellar phase of high-mass star formation.

Abstract Copyright: © J. Molet et al. 2019

Journal keyword(s): stars: formation - stars: massive - ISM: abundances - ISM: molecules - radio lines: ISM

Simbad objects: 37

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Number of rows : 37

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 [JCC87] IRAS 4A2 Y*O 03 29 10.413 +31 13 32.20           ~ 81 1
2 NGC 1333 OpC 03 29 11 +31 18.6           ~ 1219 1
3 [HRF2005] 3 PoC 03 33 21.3 +31 07 27           ~ 60 0
4 [KJD2006] SMM J033335+31075 PoC 03 33 21.3 +31 07 28           ~ 73 0
5 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 680 0
6 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2001 1
7 NGC 2264 OpC 06 40 58 +09 53.7     3.9     ~ 1587 1
8 [WSL2017] CMM3A Y*O 06 41 12.250 +09 29 11.85           ~ 2 0
9 LDN 183 MoC 15 54 12.2 -02 49 42           ~ 682 1
10 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1035 1
11 LDN 1689B DNe 16 34 42.1 -24 36 11           ~ 138 0
12 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11535 0
13 [QSR2011] Sgr B2(N)-SMA2 cor 17 47 19.885 -28 22 13.29           ~ 37 0
14 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 1909 1
15 [WZT2014] P6-SMA 1 smm 18 10 07.80 -19 29 01.2           ~ 6 0
16 [CBH2011b] G11.92-0.61 MM2 mm 18 13 57.860 -18 54 14.04           ~ 10 0
17 [KTC2017] C9A cor 18 42 52.02 -03 59 46.8           ~ 4 0
18 [MNL2018] 6 cor 18 47 46.160 -01 54 33.30           ~ 3 0
19 [MNL2018] 18 cor 18 47 46.250 -01 54 33.41           ~ 1 0
20 [MNL2018] 3 cor 18 47 46.370 -01 54 33.41           ~ 2 0
21 [MNL2018] 9 cor 18 47 46.480 -01 54 32.54           ~ 1 0
22 [MNL2018] 4 cor 18 47 46.980 -01 54 26.42           ~ 1 0
23 [MSL2003] W43-MM1 cor 18 47 47.0 -01 54 28           ~ 95 0
24 [MNL2018] 1 cor 18 47 47.020 -01 54 26.86           ~ 1 0
25 OH 34.26 +0.15 SFR 18 53 18.54 +01 14 57.9           ~ 460 0
26 [BSC2014] A cor 18 54 00.645 +02 01 19.23           ~ 4 0
27 [AVS2017] G35.20A cor 18 58 12.9480 +01 40 37.419           ~ 3 0
28 [BMC2010] CygX-N53 MM2 mm 20 39 03.22 +42 25 51.2           ~ 11 0
29 [MBS2007c] CygX-N63 mm 20 40 05.2 +41 32 13           ~ 14 0
30 NGC 7129 OpC 21 42 56 +66 06.2     11.5     ~ 233 0
31 NAME NGC 7129 FIR 2 IR 21 44 01.5 +66 03 40           ~ 84 0
32 NAME Cep E HII 23 03 12.779 +61 42 25.75           ~ 153 0
33 [WZS2012] NGC 7538 SC mm 23 13 44.510 +61 26 47.80           ~ 4 0
34 [WZS2012] NGC 7538 SB mm 23 13 44.750 +61 26 48.80           ~ 4 0
35 NGC 7538S Y*O 23 13 44.8 +61 26 51           ~ 73 1
36 [WZS2012] NGC 7538 SA1 mm 23 13 44.986 +61 26 49.80           ~ 4 0
37 NAME Galactic Bar reg ~ ~           ~ 893 0

    Equat.    Gal    SGal    Ecl

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2020.07.08-03:58:58

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