2005ApJ...634L..57S

Query : 2005ApJ...634L..57S

2005ApJ...634L..57S - Astrophys. J., 634, L57-L60 (2005/November-3)

High-mass starless cores.

SRIDHARAN T.K., BEUTHER H., SAITO M., WYROWSKI F. and SCHILKE P.

Abstract (from CDS):

We report the identification of a sample of potential high-mass starless cores (HMSCs). The cores were discovered by comparing images of fields containing candidate high-mass protostellar objects (HMPOs) at 1.2 mm and mid-infrared (MIR; 8.3 µm) wavelengths. While the HMPOs are detected at both wavelengths, several cores emitting at 1.2 mm in the same fields show absorption or no emission at the MIR wavelength. We argue that the absorption is caused by cold dust. The estimated masses of a few times 102-103 M☉ and the lack of IR emission suggest that they may be massive cold cores in a prestellar phase, which could form massive stars. Ammonia observations indicate smaller velocity dispersions and lower rotation temperatures compared with HMPOs and ultracompact H II regions, suggesting a quiescent prestellar stage. We propose that these newly discovered cores are good candidates for the HMSC stage in high-mass star formation. This sample of cores will allow us to study the high-mass star and cluster formation processes at the earliest evolutionary stages.

Abstract Copyright: ∼

Journal keyword(s): ISM: Dust, Extinction - Infrared: ISM - ISM: Clouds - ISM: Molecules - ISM: Structure - Stars: Formation

Nomenclature: Table 1: [BSM2002] HHMMm+DDMM NN N=27 added.

Simbad objects: 84

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Number of rows : 84
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 AGAL G012.889+00.516 Y*O 18 11 45.41 -17 30 39.7           ~ 12 0
2 GAL 012.89+00.49 HII 18 11 51.3 -17 31 29           ~ 217 0
3 OH 012.03-00.04 Y*O 18 12 01.8400 -18 31 55.800           ~ 91 0
4 [BSM2002] 18090-1832 2 cor 18 12 02.0 -18 31 27           ~ 3 0
5 [BSM2002] 18102-1800 1 cor 18 13 11.0 -18 00 23           ~ 7 0
6 IRAS 18102-1800 HII 18 13 12.2 -17 59 35           ~ 24 0
7 [BSM2002] 18151-1208 2 cor 18 17 50.36 -12 07 54.8           ~ 18 0
8 IRAS 18151-1208 Y*O 18 17 58.1254 -12 07 24.893           ~ 114 0
9 EGO G016.59-0.05 HII 18 21 07.9 -14 31 53           ~ 129 0
10 OH 016.59-00.05 Mas 18 21 09.0840 -14 31 48.556           ~ 85 0
11 [BSM2002] 18182-1433 4 cor 18 21 14.0 -14 34 20           ~ 2 0
12 SSTGLMC G016.5783-00.0814 Y*O 18 21 15.046 -14 33 02.41           ~ 33 0
13 [BSM2002] 18182-1433 3 cor 18 21 17.5 -14 29 43           ~ 2 0
14 [BSM2002] 18223-1243 4 cor 18 25 07.23 -12 47 54.2           ~ 8 0
15 NAME IRDC 18223-3 Y*O 18 25 08 -12 45.5           ~ 80 0
16 SSTGLMC G018.6274-00.0705 Y*O 18 25 10.0397930400 -12 44 08.557501272           ~ 30 0
17 IRAS 18223-1243 Y*O 18 25 10.9307288448 -12 42 15.754722912           ~ 67 1
18 [BSM2002] 18223-1243 5 cor 18 25 12.0 -12 53 23           ~ 2 0
19 [BSM2002] 18223-1243 6 cor 18 25 16.2 -12 55 33           ~ 2 0
20 [BSM2002] 18247-1147 3 cor 18 27 31.0 -11 44 46           ~ 3 0
21 MMB G019.755-00.128 Y*O 18 27 31.602 -11 45 55.17           ~ 54 0
22 MMB G019.884-00.534 cor 18 29 14.37 -11 50 23.0           ~ 119 1
23 [BSM2002] 18264-1152 2 cor 18 29 21.0 -11 51 55           ~ 1 0
24 [BSM2002] 18264-1152 3 cor 18 29 27.0 -11 50 58           ~ 1 0
25 AGAL G023.264+00.077 cor 18 33 24.00 -08 33 31.0           ~ 43 0
26 [BSM2002] 18308-0841 3 cor 18 33 29.3 -08 38 17           ~ 2 0
27 [BSM2002] 18306-0835 3 cor 18 33 32.12 -08 32 28.5           ~ 5 0
28 IRAS 18308-0841 HII 18 33 32.89 -08 39 18.5           ~ 38 0
29 [BSM2002] 18308-0841 2 cor 18 33 34.3 -08 38 42           ~ 2 0
30 [BSM2002] 18308-0841 5 cor 18 33 34.71 -08 37 32.7           ~ 2 0
31 [BSM2002] 18306-0835 4 cor 18 33 34.8 -08 31 20           ~ 2 0
32 [BSM2002] 18308-0841 6 cor 18 33 34.9 -08 36 04           ~ 1 0
33 NAME IRDC 18310-4 cor 18 33 39.42 -08 21 10.4           ~ 20 0
34 IRAS 18310-0825 HII 18 33 47.9 -08 23 52           ~ 33 0
35 AGAL G024.373-00.159 Y*O 18 36 18.23 -07 41 01.1           ~ 14 0
36 [BSM2002] 18337-0743 7 cor 18 36 19.0 -07 41 48           ~ 7 0
37 RAFGL 5515 HII 18 36 29.0 -07 40 33           ~ 35 0
38 AGAL G024.378-00.209 cor 18 36 29.9 -07 42 05           ~ 14 0
39 [BSM2002] 18337-0743 6 cor 18 36 36.0 -07 42 17           ~ 2 0
40 [BSM2002] 18337-0743 5 cor 18 36 41.0 -07 39 56           ~ 3 0
41 [BSM2002] 18348-0616 8 cor 18 37 14.7 -06 17 25           ~ 2 0
42 JCMTSF J183727.6-061408 cor 18 37 27.6 -06 14 08           ~ 4 0
43 IRAS 18348-0616 Y*O 18 37 30.420 -06 14 14.49   17.34 16.14 14.80   ~ 41 0
44 AGAL G027.184-00.081 cor 18 41 13.26 -05 08 57.9           ~ 60 0
45 AGAL G027.179-00.104 cor 18 41 17.320 -05 09 56.83           ~ 22 0
46 [BSM2002] 18431-0312 3 cor 18 45 45.0 -03 08 56           ~ 2 0
47 IRAS 18431-0312 HII 18 45 45.5 -03 09 21           ~ 21 0
48 [BSM2002] 18431-0312 4 cor 18 45 53.0 -03 09 01           ~ 3 0
49 AGAL G030.389+00.124 cor 18 46 21.90 -02 12 23.7           ~ 23 0
50 AGAL G030.363+00.107 cor 18 46 22.34 -02 14 11.8           ~ 20 0
51 IRAS 18437-0216 HII 18 46 22.7 -02 13 24           ~ 20 0
52 [BSM2002] 18440-0148 2 cor 18 46 31.0 -01 47 08           ~ 2 0
53 IRAS 18440-0148 cor 18 46 36.56 -01 45 21.2           ~ 65 0
54 IRAS 18445-0222 HII 18 47 10.6 -02 19 08           ~ 31 0
55 [BSM2002] 18445-0222 4 cor 18 47 14.6 -02 15 44           ~ 4 0
56 IRAS 18447-0229 HII 18 47 23.7 -02 25 55           ~ 23 0
57 [BSM2002] 18447-0229 5 cor 18 47 31.4 -02 26 46           ~ 4 0
58 [BSM2002] 18447-0229 4 cor 18 47 38.9 -02 28 00           ~ 5 0
59 [BSM2002] 18447-0229 3 cor 18 47 42.0 -02 25 12           ~ 4 0
60 [BSM2002] 18454-0158 9 cor 18 47 50.0 -01 53 46           ~ 3 0
61 JCMTLSP J184749.7-015729 cor 18 47 50.5 -01 57 28           ~ 7 0
62 AGAL G030.848-00.081 Y*O 18 47 56 -01 53.5           ~ 36 0
63 [BSM2002] 18454-0158 5 cor 18 47 58.08 -01 56 10.4           ~ 6 0
64 IRAS 18454-0158 HII 18 48 01.3 -01 54 49           ~ 16 0
65 SDC G30.854-0.109 cor 18 48 02.17 -01 53 56.5           ~ 11 0
66 [BSM2002] 18454-0158 12 cor 18 48 05.7 -01 53 28           ~ 2 0
67 [BSM2002] 18454-0158 11 cor 18 48 07.0 -01 53 25           ~ 1 0
68 [BSM2002] 18454-0158 10 cor 18 48 10.0 -01 53 29           ~ 4 0
69 [BSM2002] 18460-0307 3 cor 18 48 36.24 -03 03 46.0           ~ 3 0
70 AGAL G029.886-00.781 Y*O 18 48 40 -03 03.9           ~ 33 0
71 [BSM2002] 18460-0307 4 cor 18 48 46.0 -03 04 05           ~ 3 0
72 [BSM2002] 18460-0307 5 cor 18 48 47.0 -03 01 29           ~ 3 0
73 [BSM2002] 18530+0215 2 cor 18 55 29.0 +02 17 43           ~ 3 0
74 IRAS 18530+0215 cor 18 55 33.7 +02 19 09           ~ 43 0
75 IRAS 19175+1357 cor 19 19 49.22 +14 02 46.8           ~ 30 0
76 [BSM2002] 19175+1357 4 cor 19 19 50.58 +14 01 22.4           ~ 8 0
77 [BSM2002] 19175+1357 3 cor 19 19 52.04 +14 01 51.0           ~ 6 0
78 [BSM2002] 19410+2336 2 cor 19 43 10.20 +23 45 03.0           ~ 6 0
79 MSX6C G059.7831+00.0648 Y*O 19 43 11.2464 +23 44 03.270           ~ 159 0
80 IRAS 19410+2336 SFR 19 43 11.5 +23 44 06           ~ 160 0
81 IRAS 20081+2720 HII 20 10 11.5 +27 29 06           ~ 43 1
82 JCMTSF J201013.0+272814 cor 20 10 13.12 +27 28 17.0           ~ 8 0
83 JCMTSE J225855.3+592838 cor 22 58 55.15 +59 28 32.6           ~ 8 0
84 [BNM96] 109.098-0.346 HII 22 59 05.5344256224 +59 28 23.280817692           ~ 45 0

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