2017A&A...606A.102F


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.21CET20:44:37

2017A&A...606A.102F - Astronomy and Astrophysics, volume 606A, 102-102 (2017/10-1)

A CO survey on a sample of Herschel cold clumps.

FEHER O., JUVELA M., LUNTTILA T., MONTILLAUD J., RISTORCELLI I., ZAHORECZ S. and TOTH L.V.

Abstract (from CDS):

Context. The physical state of cold cloud clumps has a great impact on the process and efficiency of star formation and the masses of the forming stars inside these objects. The sub-millimetre survey of the Planck space observatory and the far-infrared follow-up mapping of the Herschel space telescope provide an unbiased, large sample of these cold objects.
Aims. We have observed 12CO(1-0) and 13CO(1-0) emission in 35 high-density clumps in 26 Herschel fields sampling different environments in the Galaxy. Here, we aim to derive the physical properties of the objects and estimate their gravitational stability.
Methods. The densities and temperatures of the clumps were calculated from both the dust continuum and the molecular line data. Kinematic distances were derived using 13CO(1-0) line velocities to verify previous distance estimates and the sizes and masses of the objects were calculated by fitting 2D Gaussian functions to their optical depth distribution maps on 250µm. The masses and virial masses were estimated assuming an upper and lower limit on the kinetic temperatures and considering uncertainties due to distance limitations.
Results. The derived excitation temperatures are between 8.5-19.5K, and for most clumps between 10-15K, while the Herschel-derived dust colour temperatures are more uniform, between 12-16K. The sizes (0.1-3pc), 13CO column densities (0.5-44x1015cm–2) and masses (from less than 0.1M to more than 1500M) of the objects all span broad ranges. We provide new kinematic distance estimates, identify gravitationally bound or unbound structures and discuss their nature.
Conclusions. The sample contains objects on a wide scale of temperatures, densities and sizes. Eleven gravitationally unbound clumps were found, many of them smaller than 0.3pc, but large, parsec-scale clouds with a few hundred solar masses appear as well. Colder clumps have generally high column densities but warmer objects appear at both low and higher column densities. The clump column densities derived from the line and dust observations correlate well, but are heavily affected by uncertainties of the dust properties, varying molecular abundances and optical depth effects.

Abstract Copyright: © ESO, 2017

Journal keyword(s): molecular data - ISM: clouds - dust, extinction - ISM: molecules - ISM: molecules

VizieR on-line data: <Available at CDS (J/A+A/606/A102): table1.dat sp/*>

Nomenclature: Tables 1-2: [FJL2017] GLLL.ll+BB.bb A, [FJL2017] GLLL.ll+BB.bb-1A> N=35.

Simbad objects: 48

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Number of rows : 48

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 [FJL2017] G109.18-37.59A MoC 00 03 48.90 +23 58 47.0           ~ 1 0
2 [FJL2017] G126.24-05.52A MoC 01 15 46.80 +57 12 45.3           ~ 1 0
3 [MJR2015] 495 Y*? 02 50 20.46480 +55 51 09.3240           ~ 2 0
4 [MJR2015] 871 FIR 02 56 00.13680 +19 26 15.7560           ~ 2 0
5 [MJR2015] 892 FIR 02 57 49.19520 +19 23 28.8240           ~ 2 0
6 [MJR2015] 1239 FIR 03 18 14.03760 +10 18 11.7000           ~ 2 0
7 [FJL2017] G159.12-14.30A MoC 03 50 31.90 +35 40 50.9           ~ 1 0
8 NAME Tau-Aur Region SFR 04 30 +25.0           ~ 1188 1
9 NAME Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3357 0
10 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1333 0
11 V* TX Cam Mi* 05 00 51.1569959503 +56 10 54.093107078       14.02   M9-9.5 326 0
12 [MJR2015] 1291 FIR 05 16 27.95040 +15 09 02.3400           ~ 2 0
13 [MJR2015] 1326 FIR 05 29 07.34640 +15 30 55.5480           ~ 2 0
14 [FJL2017] G174.22+02.58B MoC 05 40 28.00 +35 04 56.4           ~ 1 0
15 [FJL2017] G174.22+02.58A MoC 05 41 34.50 +35 10 25.6           ~ 1 0
16 [MJR2015] 1562 FIR 06 04 18.78240 +04 11 45.6720           ~ 2 0
17 [MJR2015] 1376 Y*O 06 10 57.89040 +14 09 26.5680           ~ 2 0
18 [FJL2017] G205.06-06.04-1A MoC 06 16 04.30 +04 00 47.3           ~ 1 0
19 [MJR2015] 532 FIR 08 48 35.85120 +72 43 21.3960           ~ 2 0
20 [DB2002b] G142.27+36.17 MoC 09 06.1 +71 16           ~ 24 0
21 NAME UMa Region reg 11 00 +50.0           ~ 316 0
22 V* S UMi Mi* 15 29 34.5775148185 +78 38 00.274235079   10.32       M6.5-7.5e 123 0
23 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 2959 0
24 [MJR2015] 2270 FIR 18 08 35.68080 -01 49 53.7240           ~ 2 0
25 LDN 466 DNe 18 19 41.9 -06 04 40           ~ 19 0
26 [FJL2017] G037.49+03.03A MoC 18 48 55.80 +05 27 01.8           ~ 1 0
27 [MJR2015] 2925 FIR 18 49 09.27360 +05 37 36.1920           ~ 2 0
28 [MJR2015] 2928 Y*O 18 52 53.28480 +05 25 10.1280           ~ 2 0
29 [MJR2015] 2929 Y*O 18 53 30.96480 +05 25 30.9360           ~ 2 0
30 [FJL2017] G039.65+01.75-1A MoC 18 57 02.50 +06 58 22.4           ~ 1 0
31 [MJR2015] 2958 Y*? 18 57 30.61920 +06 48 30.9240           ~ 2 0
32 LDN 531 DNe 19 06 10.0 -06 53 45           ~ 65 0
33 LDN 663 DNe 19 36 55 +07 34.4           ~ 544 0
34 [MJR2015] 3102 FIR 19 59 49.40400 +24 13 52.7160           ~ 2 0
35 [FJL2017] G069.57-01.74-1B MoC 20 13 05.80 +31 18 23.4           ~ 1 0
36 [FJL2017] G069.57-01.74-1A MoC 20 13 32.60 +31 21 52.4           ~ 1 0
37 [FJL2017] G070.10-01.69-1B MoC 20 14 07.70 +31 38 29.2           ~ 1 0
38 [FJL2017] G070.10-01.69-1A MoC 20 14 35.40 +31 57 26.6           ~ 1 0
39 [FJL2017] G071.27-11.32A MoC 20 53 20.60 +26 52 00.9           ~ 1 0
40 [FJL2017] G095.76+08.17-1A MoC 20 56 49.90 +58 01 35.1           ~ 1 0
41 [MJR2015] 3700 FIR 20 57 52.37280 +58 07 08.8320           ~ 2 0
42 IC 5146 SFR 21 53 24 +47 16.0   7.82 7.2     ~ 377 2
43 [FJL2017] G091.09-39.46A MoC 23 10 30.30 +17 05 32.4           ~ 1 0
44 [FJL2017] G115.93+09.47A MoC 23 23 52.60 +71 08 45.5           ~ 1 0
45 [FJL2017] G115.93+09.47B MoC 23 24 25.20 +71 11 03.8           ~ 1 0
46 [MJR2015] 147 FIR 23 38 02.07360 +48 35 17.9880           ~ 2 0
47 [MJR2015] 293 FIR 23 56 45.93360 +59 42 32.1840           ~ 2 0
48 V* R Cas Mi* 23 58 24.8700291935 +51 23 19.691977266 6.71 6.63 4.80     M6.5-9e 674 0

    Equat.    Gal    SGal    Ecl

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2020.01.21-20:44:37

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