2009ApJ...703.1444R


Query : 2009ApJ...703.1444R

2009ApJ...703.1444R - Astrophys. J., 703, 1444-1463 (2009/October-1)

A two micron all sky survey analysis of the stability of southern Bok globules.

RACCA G.A., VILAS-BOAS J.W.S. and DE LA REZA R.

Abstract (from CDS):

We used near-infrared Two Micron All Sky Survey data to construct visual extinction maps of a sample of Southern Bok globules utilizing the NICE method. We derived radial extinction profiles of dense cores identified in the globules and analyzed their stability against gravitational collapse with isothermal Bonnor-Ebert spheres. The frequency distribution of the stability parameter (ξmax) of these cores shows that a large number of them are located in stable states, followed by an abrupt decrease of cores in unstable states. This decrease is steeper for globules with associated IRAS point sources than for starless globules. Moreover, globules in stable states have a Bonnor-Ebert temperature of T = 15±6 K, while the group of critical plus unstable globules has a different temperature of T = 10±3 K. Distances were estimated to all the globules studied in this work and the spectral class of the IRAS sources was calculated. No variations were found in the stability parameters of the cores and the spectral class of their associated IRAS sources. On the basis of 13CO J = 1 - 0 molecular line observations, we identified and modeled a blue-asymmetric line profile toward a globule of the sample, obtaining an upper limit infall speed of 0.25 km/s.

Abstract Copyright:

Journal keyword(s): dust, extinction - infrared: ISM - ISM: globules - stars: formation

Nomenclature: Tables 4-6: [RVD2009] NNNA N=28.

Simbad objects: 72

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Number of rows : 72
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1269 0
2 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 786 1
3 [RVD2009] 16A cor 08 05 18.8 -39 08 53           ~ 1 0
4 TGU H1654 MoC 08 05 26 -39 08.9           ~ 15 0
5 [RVD2009] 16B cor 08 05 27.2 -39 08 20           ~ 1 0
6 [RVD2009] 34 cor 08 26 27.7 -50 39 30           ~ 1 0
7 IRAS 08250-5030 FIR 08 26 31.7 -50 40 30           ~ 10 0
8 BHR 34 MoC 08 26 34 -50 39.9           ~ 18 0
9 [RVD2009] 44A cor 09 26 09.3 -45 11 10           ~ 1 0
10 TGU H1712 P5 MoC 09 26 19 -45 11.0           ~ 11 0
11 [RVD2009] 44B cor 09 26 20.4 -45 10 56           ~ 1 0
12 [RVD2009] 53 cor 09 28 46.5 -51 36 20           ~ 1 0
13 BHR 53 MoC 09 28 47 -51 36.7           ~ 15 0
14 BHR 58 MoC 10 49 00 -62 23.1           ~ 8 0
15 IRAS 10471-6206 IR 10 49 01.6 -62 22 16           ~ 6 0
16 [RVD2009] 58 cor 10 49 02.4 -62 22 18           ~ 1 0
17 [DB2002b] G291.05-1.65 MoC 11 07 07 -62 05.8           ~ 16 0
18 [RVD2009] 59 cor 11 07 10.1 -62 05 36           ~ 1 0
19 BHR 74 MoC 12 22 09 -66 27.1           ~ 7 0
20 [RVD2009] 74 cor 12 22 10.2 -66 27 39           ~ 1 0
21 TGU H1861 MoC 12 24 13 -66 10.7           ~ 11 0
22 [RVD2009] 75 cor 12 24 14.2 -66 10 58           ~ 1 0
23 NAME Coalsack G2 MoC 12 31 29 -63 44.8           ~ 39 0
24 NAME Thumbprint Nebula DNe 12 44 55.6 -78 48 16           ~ 22 0
25 Sandqvist 160 DNe 13 06.9 -77 01           ~ 41 0
26 [RVD2009] 111 cor 15 42 19.8 -52 48 26           ~ 1 0
27 BHR 111 MoC 15 42 20 -52 49.1           ~ 15 0
28 IRAS 16009-3927 * 16 04 17.1122528774 -39 36 07.537384517           ~ 3 0
29 BHR 126 MoC 16 04 29 -39 37.8           ~ 8 0
30 [RVD2009] 126 cor 16 04 29.2 -39 37 47           ~ 1 0
31 [RVD2009] 117B cor 16 06 11.8 -45 56 29           ~ 1 0
32 BHR 117 MoC 16 06 18 -45 55.3           ~ 7 0
33 [RVD2009] 117A cor 16 06 25.2 -45 54 17           ~ 1 0
34 [SYS98] 160257.9-454808 Y*O 16 06 31.7 -45 56 11           ~ 4 0
35 [DB2002b] G331.03-0.73 MoC 16 12 43 -52 15.6           ~ 6 0
36 [RVD2009] 113 cor 16 12 51.6 -52 16 23           ~ 1 0
37 BHR 144 MoC 16 37 28 -35 13.9           ~ 9 0
38 [RVD2009] 144A cor 16 37 29.3 -35 13 43           ~ 1 0
39 [RVD2009] 144B cor 16 37 35.5 -35 14 43           ~ 1 0
40 [RVD2009] 133 cor 16 46 42.6 -44 31 10           ~ 1 0
41 [DB2002b] G340.53+0.50 MoC 16 46 45 -44 30.8           ~ 12 0
42 [DB2002b] G337.09-4.90 MoC 16 58 42 -50 35.8           ~ 10 0
43 [RVD2009] 121 cor 16 58 47.0 -50 36 34           ~ 1 0
44 IRAS 16549-5030 IR 16 58 51.5 -50 35 30           ~ 4 0
45 IRAS 16554-5031 * 16 59 20.5756381513 -50 35 32.790806835           ~ 4 0
46 [DB2002b] G349.03+3.02 MoC 17 04 26 -36 18.8           ~ 7 0
47 [RVD2009] 148 cor 17 04 26.4 -36 18 34           ~ 1 0
48 BHR 149 MoC 17 04 27 -36 08.4           ~ 5 0
49 IRAS 17011-3613 IR 17 04 31.1 -36 18 21           ~ 6 0
50 [RVD2009] 149A cor 17 04 31.2 -36 07 52           ~ 1 0
51 IRAS 17012-3603 MIR 17 04 34.68048 -36 07 20.3736           ~ 5 0
52 [RVD2009] 149B cor 17 04 53.1 -36 03 15           ~ 1 0
53 IRAS 17159-4324 FIR 17 19 30.0103563590 -43 27 06.756385344           ~ 3 0
54 [RVD2009] 138 cor 17 19 32.9 -43 26 55           ~ 1 0
55 BHR 138 MoC 17 19 36 -43 27.1           ~ 6 0
56 IRAS 17169-4314 FIR 17 20 32.0 -43 17 39           ~ 2 0
57 BHR 139 MoC 17 20 45 -43 20.5           ~ 6 0
58 [SYS98] 171716.1-431655 Y*O 17 20 51.7 -43 19 52           ~ 7 0
59 [RVD2009] 139 cor 17 20 51.7 -43 19 44           ~ 1 0
60 LDN 57 DNe 17 22 38.2 -23 49 34           ~ 290 1
61 [RVD2009] 140B cor 17 22 52.9 -43 21 40           ~ 1 0
62 IRAS 17193-4319 IR 17 22 54.8 -43 22 13           ~ 7 0
63 [DB2002b] G345.38-3.98 MoC 17 22 55 -43 22.6           ~ 11 0
64 [RVD2009] 140A cor 17 22 56.2 -43 22 26           ~ 1 0
65 2MASS J17230610-4322546 * 17 23 06.1007037953 -43 22 54.742710296           ~ 2 0
66 [RVD2009] 140C cor 17 23 29.6 -43 25 10           ~ 1 0
67 [RVD2009] 145 cor 17 47 51.9 -43 42 15           ~ 1 0
68 TGU H2132 P1 MoC 17 48 01 -43 43.2           ~ 12 0
69 LDN 663 DNe 19 36 55 +07 34.4           ~ 587 0
70 [LM99] L694-2 cor 19 41 04.6 +10 57 02           ~ 65 0
71 LDN 1014 cor 21 24 05.9 +49 59 07           ~ 92 0
72 LDN 1251B DNe 22 38 46.79 +75 11 32.6           ~ 50 1

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2021.11.30-18:55:19

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