2020MNRAS.496.1990R

Query : 2020MNRAS.496.1990R

2020MNRAS.496.1990R - Mon. Not. R. Astron. Soc., 496, 1990-1999 (2020/August-1)

DC3N observations towards high-mass star-forming regions.

RIVILLA V.M., COLZI L., FONTANI F., MELOSSO M., CASELLI P., BIZZOCCHI L., TAMASSIA F. and DORE L.

Abstract (from CDS):

We present the study of deuteration of cyanoacetylene (HC3N) towards a sample of 28 high-mass star-forming cores divided into different evolutionary stages, from starless to evolved protostellar cores. We report for the first time the detection of DC3N towards 15 high-mass cores. The abundance ratios of DC3N with respect HC3N range in the interval 0.003-0.022, lower than those found in low-mas protostars and dark clouds. No significant trend with the evolutionary stage, or with the kinetic temperature of the region, has been found. We compare the level of deuteration of HC3N with those of other molecules towards the same sample, finding weak correlation with species formed only or predominantly in gas phase (N2H+ and HNC, respectively), and no correlation with species formed only or predominantly on dust grains (CH3OH and NH3, respectively). We also present a single-dish map of DC3N towards the protocluster IRAS 05358+3543, which shows that DC3N traces an extended envelope (∼0.37 pc) and peaks towards two cold condensations separated from the positions of the protostars and the dust continuum. The observations presented in this work suggest that deuteration of HC3N is produced in the gas of the cold outer parts of massive star-forming clumps, giving us an estimate of the deuteration factor prior to the formation of denser gas.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

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

Nomenclature: Fig. 4, Tables 1-2: [RCF2020] 05358-DN (Nos D1-D2).

Simbad objects: 38

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Number of rows : 38
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [PSB2010] MM1 cor 00 14 26.10 +64 28 44.0           ~ 17 1
2 [PSB2010] MM2 mm 00 14 26.3 +64 28 27           ~ 19 0
3 [HSW2018] NGC 1333-17 smm 03 29 03.73 +31 16 03.8           ~ 131 0
4 LDN 1527 DNe 04 39 53 +25 45.0           ~ 689 0
5 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1872 0
6 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 965 0
7 [PFG2013] A5142-MM1 mm 05 30 48.031 +33 47 54.64           ~ 19 0
8 [BEZ2011] EC cor 05 30 48.7 +33 47 53           ~ 18 0
9 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2421 1
10 IRAS 05358+3543 Y*O 05 39 09.92 +35 45 17.2           ~ 171 0
11 [RCF2020] 05358-D2 cor 05 39 11.50 +35 45 23.9           ~ 1 0
12 [RCF2020] 05358-D1 cor 05 39 11.50 +35 45 46.2           ~ 1 0
13 [BSG2002] mm3 mm 05 39 12.49 +35 45 55.2           ~ 21 0
14 [BSG2002] mm1 mm 05 39 13.08 +35 45 50.5           ~ 15 0
15 [WZM2000] MMS 3 mm 06 41 12.3 +09 29 12           ~ 32 0
16 [PCW91] Ced 110 IRS 10 Y*O 11 06 33.38 -77 23 34.6           ~ 79 1
17 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1357 1
18 [DMN2000] Sgr B2 N2 PoC 17 47 19.90 -28 23 17.3           ~ 14 0
19 RAFGL 2046 HII 18 00 32.1 -24 04 03           ~ 380 0
20 GAL 012.89+00.49 HII 18 11 51.3 -17 31 29           ~ 217 0
21 AGAL G028.324+00.067 Y*O 18 42 46.7 -04 04 08           ~ 59 0
22 [KTC2017] F1 cor 18 53 16.54 +01 26 09.0           ~ 3 0
23 [KTC2017] F2 cor 18 53 19.25 +01 26 52.8           ~ 3 0
24 IRAS 18517+0437 SFR 18 54 13.8 +04 41 32           ~ 89 0
25 [BT2009] G2 mm 18 56 50.3 +01 23 16           ~ 33 0
26 NAME I19035-VLA1 HII 19 06 01.5 +06 46 35           ~ 17 1
27 IRAS 19410+2336 SFR 19 43 11.5 +23 44 06           ~ 160 0
28 Onsala 1 cor 20 10 09.2036 +31 31 36.090           ~ 194 0
29 GRS G075.78 +00.34 HII 20 21 43.6 +37 26 36           ~ 19 0
30 [PEG2007] WCloud Cld 20 31 10.71 +40 03 30.3           ~ 17 0
31 [BSG2004] IRAS 20293+3952 mm 1 mm 20 31 12.88 +40 03 22.8           ~ 15 0
32 IRAS 21307+5049 Y*O 21 32 30.59280 +51 02 16.0368           ~ 49 0
33 [FPC2011] I22134-B cor 22 15 05.8 +58 48 59           ~ 14 0
34 [FPC2011] I22134-VLA1 cor 22 15 09.2 +58 49 08           ~ 13 0
35 [FPC2011] I22134-G cor 22 15 10.5 +58 48 59           ~ 13 0
36 IRAS 23033+5951 Y*O 23 05 25.1762883456 +60 08 15.374293800           ~ 97 0
37 IRAS 23118+6110 Y*O 23 14 02.09473 +61 27 18.8460           ~ 385 0
38 Mol 160 Rad 23 40 54.5 +61 10 28           ~ 121 0

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