2014A&A...570A..65G


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST15:10:28

2014A&A...570A..65G - Astronomy and Astrophysics, volume 570A, 65-65 (2014/10-1)

ATLASGAL-selected massive clumps in the inner Galaxy. I. CO depletion and isotopic ratios.

GIANNETTI A., WYROWSKI F., BRAND J., CSENGERI T., FONTANI F., WALMSLEY C.M., NGUYEN LUONG Q., BEUTHER H., SCHULLER F., GUESTEN R. and MENTEN K.M.

Abstract (from CDS):

In the low-mass regime, molecular cores have spatially resolved temperature and density profiles allowing a detailed study of their chemical properties. It is found that the gas-phase abundances of C-bearing molecules in cold starless cores rapidly decrease with increasing density. Here the molecules tend to stick to the grains, forming ice mantles. We study CO depletion in a large sample of massive clumps, and investigate its correlation with evolutionary stage and with the physical parameters of the sources. Moreover, we study the gradients in [12C]/[13C] and [18O]/[17O] isotopic ratios across the inner Galaxy, and the virial stability of the clumps. From the ATLASGAL 870µm survey we selected 102 clumps, which have masses in the range ∼102-3x104M, sampling different evolutionary stages. We use low-J emission lines of CO isotopologues and the dust continuum emission to infer the depletion factor fD. RATRAN one-dimensional models were also used to determine fD and to investigate the presence of depletion above a density threshold. The isotopic ratios and optical depth were derived with a Bayesian approach. We find a significant number of clumps with a high degree of CO depletion, up to ∼20. Larger values are found for colder clumps, thus for earlier evolutionary phases. For massive clumps in the earliest stages of evolution we estimate the radius of the region where CO depletion is important to be a few tenths of a pc. The value of the [12C]/[13C] ratio is found to increase with distance from the Galactic centre, with a value of ∼66±12 for the solar neighbourhood. The [18O]/[17O] ratio is approximately constant (∼4) across the inner Galaxy between 2kpc and 8kpc, albeit with a large range (∼2-6). Clumps are found with total masses derived from dust continuum emission up to ∼20 times higher than Mvir, especially among the less evolved sources. These large values may in part be explained by the presence of depletion: if the CO emission comes mainly from the low-density outer layers, the molecules may be subthermally excited, leading to an overestimate of the dust masses. CO depletion in high-mass clumps seems to behave as in the low-mass regime, with less evolved clumps showing larger values for the depletion than their more evolved counterparts, and increasing for denser sources. The ratios [12C]/[13C] and [18O]/[17O] are consistent with previous determinations, and show a large intrinsic scatter.

Abstract Copyright:

Journal keyword(s): ISM: abundances - ISM: clouds - ISM: molecules

VizieR on-line data: <Available at CDS (J/A+A/570/A65): tablea1.dat-tablea18.dat >

Simbad objects: 104

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Number of rows : 104

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 OH 301.14 -0.23 cor 12 35 35.14 -63 02 32.6           ~ 32 0
2 [HBM2005] G305.192-0.006 cor 13 11 13.6 -62 47 29           ~ 15 0
3 [HBM2005] G305.21+0.21 cor 13 11 14 -62 34.7           ~ 20 0
4 MMB G305.563+00.013 cor 13 14 26.90 -62 44 29.4           ~ 15 0
5 AGAL G305.794-00.096 Y*O 13 16 32.84 -62 49 41.3           ~ 11 0
6 MMB G309.384-00.135 cor 13 47 23.98 -62 18 12.0           ~ 23 0
7 AGAL G310.014+00.387 cor 13 51 40 -61 39.4           ~ 17 0
8 MMB G313.577+00.325 cor 14 20 08.58 -60 42 00.8           ~ 20 0
9 MMB G316.640-00.087 cor 14 44 18.45 -59 55 11.5           ~ 22 0
10 AGAL G317.867-00.151 Y*O 14 53 16 -59 26.5           ~ 16 0
11 AGAL G318.779-00.137 Y*O 14 59 33.06 -59 00 33.5           ~ 13 0
12 AGAL G320.881-00.397 Y*O 15 14 33.18 -58 11 28.5           ~ 12 0
13 MMB G326.662+00.520 cor 15 45 02.95 -54 09 03.1           ~ 16 0
14 IRAS 15437-5343 Y*O 15 47 32.73 -53 52 38.4           ~ 45 0
15 MMB G326.986-00.031 Y*O 15 49 07.67 -54 23 04.5           ~ 14 0
16 AGAL G327.393+00.199 cor 15 50 19 -53 57.1           ~ 16 0
17 OH 327.29 -0.58 cor 15 53 07.65 -54 37 06.1           ~ 41 0
18 AGAL G328.809+00.632 cor 15 55 49 -52 43.1           ~ 18 0
19 AGAL G329.029-00.206 cor 16 00 32 -53 12.9           ~ 15 0
20 IRAS 15573-5307 cor 16 01 09.999 -53 16 02.94           ~ 37 1
21 MMB G330.953-00.182 cor 16 09 52.37 -51 54 57.6           ~ 25 0
22 AGAL G331.709+00.582 Y*O 16 10 06.61 -50 50 29.0           ~ 21 0
23 MMB G330.878-00.367 cor 16 10 19.80 -52 06 07.9           ~ 23 0
24 MMB G332.094-00.421 cor 16 16 16.45 -51 18 25.7           ~ 23 0
25 IRAS 16157-4957 cor 16 19 29.01 -50 04 41.3           ~ 30 0
26 MMB G332.826-00.549 cor 16 20 10.85 -50 53 14.2           ~ 26 0
27 MMB G333.135-00.431 cor 16 21 02.82 -50 35 12.0           ~ 21 0
28 AGAL G333.656+00.059 Y*O 16 21 11.61 -49 52 16.3           ~ 14 0
29 [LCU2014] G333.286-00.387 cor 16 21 30.3 -50 26 48           ~ 20 0
30 AGAL G333.604-00.212 cor 16 22 09.35 -50 05 58.8           ~ 20 0
31 OH 335.79 +0.17 cor 16 29 47.3094168743 -48 15 52.204707131           ~ 53 0
32 MMB G336.957-00.225 cor 16 36 16.9344603433 -47 40 48.047756433           ~ 18 0
33 MMB G337.176-00.032 cor 16 36 18.82 -47 23 19.9           ~ 20 0
34 AGAL G337.286+00.007 cor 16 36 35 -47 17.0           ~ 14 0
35 MMB G337.258-00.101 cor 16 36 56.32 -47 22 26.4           ~ 22 0
36 AGAL G337.704-00.054 cor 16 38 30 -47 00.7           ~ 19 0
37 [BE83] Maser 337.40-00.40 cor 16 38 50.52 -47 28 00.2           ~ 57 0
38 AGAL G338.066+00.044 Y*O 16 39 28.60 -46 40 34.6           ~ 12 0
39 AGAL G338.786+00.476 Y*O 16 40 22.55 -45 51 04.1           ~ 14 0
40 AGAL G338.926+00.554 cor 16 40 34 -45 41.7           ~ 17 0
41 AGAL G337.916-00.477 cor 16 41 10.6 -47 08 03           ~ 26 0
42 MMB G339.622-00.121 cor 16 46 05.99 -45 36 43.3           ~ 31 0
43 AGAL G340.374-00.391 Y*O 16 50 02.47 -45 12 43.0           ~ 15 0
44 MMB G340.785-00.096 cor 16 50 14.84 -44 42 26.3           ~ 43 0
45 OH 341.22 -0.21 cor 16 52 17.86 -44 26 52.3           ~ 48 0
46 AGAL G340.746-01.001 cor 16 54 03.66 -45 18 45.1           ~ 14 0
47 MMB G342.484+00.183 cor 16 55 02.30 -43 12 59.8           ~ 19 0
48 [PLW2012] G343.124-00.064-030.4 cor 16 58 17 -42 52.3           ~ 20 0
49 MMB G343.756-00.163 cor 17 00 49.89 -42 26 08.2           ~ 19 0
50 AGAL G345.718+00.817 cor 17 03.1 -40 17           ~ 18 0
51 Caswell CH3OH 344.23-00.57 cor 17 04 07.78 -42 18 39.5           ~ 29 0
52 OH 345.50 +0.35 cor 17 04 22.91 -40 44 21.7           ~ 61 0
53 MMB G345.487+00.314 cor 17 04 28.24 -40 46 28.7           ~ 27 0
54 IRAS 17016-4124 SFR 17 05 11.160 -41 29 06.00           ~ 52 0
55 AGAL G351.131+00.771 Y*O 17 19 34.42 -35 56 46.8           ~ 12 0
56 Caswell CH3OH 351.16+00.70 cor 17 19 57.50 -35 57 52.8           ~ 27 0
57 [BE83] Maser 351.24+00.67 cor 17 20 17.84 -35 54 46.0           ~ 27 0
58 AGAL G351.571+00.762 Y*O 17 20 51.00 -35 35 25.8           ~ 16 0
59 AGAL G351.416+00.646 cor 17 20 53 -35 47.0           ~ 20 0
60 MMB G351.445+00.660 cor 17 20 54.61 -35 45 08.6           ~ 32 0
61 MMB G351.581-00.353 cor 17 25 24.9262 -36 12 42.383           ~ 30 0
62 AGAL G353.066+00.452 Y*O 17 26 14.2073 -34 31 41.429           ~ 16 0
63 OH 351.77 -0.54 cor 17 26 42.57 -36 09 17.6           ~ 83 0
64 AGAL G353.417-00.079 Y*O 17 29 18.94 -34 32 05.9           ~ 13 0
65 MMB G353.410-00.360 cor 17 30 26.18 -34 41 45.6           ~ 75 1
66 AGAL G354.944-00.537 Y*O 17 35 12.7753 -33 30 22.961           ~ 17 0
67 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11533 0
68 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 1909 1
69 MMB G008.683-00.368 cor 18 06 23.49 -21 37 10.2           ~ 24 0
70 AGAL G008.706-00.414 Y*O 18 06 37.2081 -21 37 06.564           ~ 26 0
71 MMB G010.472+00.027 cor 18 08 38.20 -19 51 50.1           ~ 39 0
72 MMB G010.444-00.018 cor 18 08 45.1076 -19 54 33.194           ~ 33 0
73 MMB G010.627-00.384 cor 18 10 29.0046 -19 55 43.983           ~ 36 1
74 MMB G013.179+00.061 cor 18 14 00.96 -17 28 32.5           ~ 18 0
75 AGAL G012.804-00.199 cor 18 14 13.34 -17 55 45.3           ~ 20 0
76 AGAL G014.194-00.194 Y*O 18 16 58.5794 -16 42 14.134           ~ 26 0
77 AGAL G014.492-00.139 Y*O 18 17 22.0275 -16 24 57.391           ~ 26 0
78 MMB G013.657-00.599 cor 18 17 24.26 -17 22 12.5           ~ 18 0
79 AGAL G014.114-00.574 Y*O 18 18 13.2635 -16 57 11.844           ~ 18 0
80 MMB G014.631-00.577 cor 18 19 15.21 -16 30 04.5           ~ 15 0
81 MMB G015.034-00.677 cor 18 20 24.78 -16 11 34.6           ~ 17 0
82 NAME IRDC 18223-3 Y*O 18 25 08.4002 -12 45 15.466           ~ 62 0
83 [CUS2014] G018.7344-0.2261 cor 18 25 56.4024 -12 42 36.876           ~ 25 0
84 MMB G018.888-00.475 cor 18 27 07.85 -12 41 35.9           ~ 16 0
85 MMB G019.884-00.534 cor 18 29 14.37 -11 50 23.0           ~ 14 0
86 AGAL G022.376+00.447 Y*O 18 30 24.5677 -09 10 25.029           ~ 37 0
87 AGAL G023.206-00.377 cor 18 34 55.4414 -08 49 11.648           ~ 24 0
88 AGAL G024.629+00.172 Y*O 18 35 35.9973 -07 18 02.858           ~ 27 0
89 AGAL G028.861+00.066 cor 18 43 46.3857 -03 35 26.817           ~ 23 0
90 AGAL G028.564-00.236 cor 18 44 17.69 -03 59 26.5           ~ 34 0
91 [HBM2005] G30.894+0.140 cor 18 47 13.6371 -01 44 55.554           ~ 20 0
92 IRAS 18449-0115 cor 18 47 34.4947 -01 12 40.269           ~ 312 0
93 [MSL2003] W43-MM1 cor 18 47 47.0 -01 54 28           ~ 95 0
94 AGAL G030.848-00.081 Y*O 18 47 55.6052 -01 53 24.265           ~ 26 0
95 AGAL G034.411+00.234 Y*O 18 53 18.0 +01 25 24           ~ 48 0
96 [ZYL2017] G34-2 cor 18 53 18.6 +01 24 40           ~ 36 0
97 [CUS2014] G034.2572+0.1535 cor 18 53 18.6449 +01 15 01.574           ~ 30 0
98 [VTW2007] IRAS 18511 A cor 18 53 37.85 +01 50 30.5           ~ 10 0
99 AGAL G035.197-00.742 cor 18 58 12.79 +01 40 37.6           ~ 13 0
100 IRAS 18566+0408 cor 18 59 10.3479 +04 12 18.220           ~ 119 1
101 BGPS G043.169+00.009 cor 19 10 14.2145 +09 06 17.697           ~ 24 0
102 AGAL G049.489-00.389 cor 19 23 44.15 +14 30 29.5           ~ 13 0
103 AGAL G053.141+00.069 cor 19 29 18.2185 +17 56 18.996           ~ 22 1
104 AGAL G059.782+00.066 cor 19 43 10.83 +23 44 03.3           ~ 9 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-15:10:28

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