1999A&AS..134..241P


C.D.S. - SIMBAD4 rel 1.7 - 2019.09.15CEST10:25:32

1999A&AS..134..241P - Astron. Astrophys., Suppl. Ser., 134, 241-254 (1999/January-2)

Rotation in molecular clouds.

PHILLIPS J.P.

Abstract (from CDS):

We have investigated a broad range of evidence concerning rotation in molecular clouds. As a consequence, we show that trends in specific angular momentum J/M and angular velocity Ω are inconsistent with certain models of isothermal, non-magnetic cloud rotation. Similarly, models of rotation which invoke turbulent vorticity may have only limited applicability to clumps and condensations. There is evidence to favour an important role for rotation in maintaining the stability of disks, larger cloud structures, and perhaps a large fraction of intermediate sized clouds, whilst rotation may also be implicated in maintaining observed departures from cloud sphericity. Although it is conceivable that magnetic braking is responsible for the radial decrement in specific angular momentum, it appears that observed gradients dln(J/M)/dln(R) are significantly shallower than is normally anticipated through this mechanism. The variation of angular momentum with cloud mass M (viz. J∝M1.7) appears to be highly correlated, and is consistent with models of clump merging in isothermal rotating clouds. Similarly, the orientations of the angular velocity vectors for clumps and condensations appear broadly random, suggesting a turbulent origin for observed components of Ω or, alternatively, a process of randomisation through magnetic and/or dynamic clump interactions. By contrast, isolated clouds (and perhaps also disks) are shown to have angular velocity vectors oriented predominantly towards the north and south galactic poles; a distribution which would be anticipated were components of J to arise from galactic shear. We show, finally, that most of the cloud subgroups appear to follow similar functional trends in J, J/M, and Ω. Disks and rings, on the other hand, appear to depart from these variations to a significant degree; a difference which presumably derives from their distinct spatio-kinematic structures.

Abstract Copyright:

Journal keyword(s): ISM: clouds - ISM: kinematics and dynamics - ISM: molecules - ISM: structure

VizieR on-line data: <Available at CDS (J/A+AS/134/241): refs.dat table1.dat>

Simbad objects: 124

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Number of rows : 124

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 [KSP2003] J022531.18+620624.5 HII 02 25 31.18 +62 06 24.5           O8V-B0.5V 93 1
2 NAME W3 IRS 5 Y*O 02 25 40.54 +62 05 51.4           B1 321 0
3 NAME W 3 OH HII 02 27 04.1 +61 52 22           ~ 925 2
4 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 942 3
5 RAFGL 490 Y*O 03 27 38.7928323987 +58 47 00.017662871           ~ 334 0
6 LDN 1455 DNe 03 28 00.6480 +30 07 58.800           ~ 167 1
7 NGC 1333 SFR 03 28 55 +31 22.2   10.9       ~ 1177 1
8 NAME [BM89] B5 DNe 03 47 38.3 +32 52 43           ~ 220 0
9 LDN 1471 DNe 03 48.0 +32 54           ~ 273 0
10 NAME [BM89] L1495 PoC 04 14 08.2 +28 09 31           ~ 170 0
11 LDN 1495 DNe 04 18.1 +27 37           ~ 271 1
12 Barnard 213 DNe 04 20 51 +27 16.3           ~ 139 0
13 Barnard 216 DNe 04 24.0 +26 37           ~ 41 0
14 Barnard 217C DNe 04 25 20 +26 29.2           ~ 3 0
15 Barnard 217F DNe 04 26 04 +26 22.7           ~ 3 0
16 Barnard 18A DNe 04 26 37 +24 36.9           ~ 4 0
17 Barnard 217 DNe 04 27 46.5 +26 17 52           ~ 84 0
18 Barnard 18D DNe 04 28 02 +24 42.3           ~ 4 0
19 Barnard 217G DNe 04 29 22 +26 14.5           ~ 3 0
20 Barnard 18G DNe 04 30 53 +24 11.5           ~ 4 0
21 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 758 1
22 NAME Kutner's Cloud MoC 04 32 44.6 +24 23 13           ~ 208 0
23 NAME [BM89] TMC-2 PoC 04 32 44.7 +24 25 13           ~ 186 0
24 Barnard 18H DNe 04 33 58 +24 09.9           ~ 4 0
25 IRAS 04325+2402 Y*O 04 35 35.392 +24 08 19.42           ~ 147 1
26 NAME B18-I DNe 04 35 39 +24 09.1           ~ 8 0
27 HCL 2D PoC 04 39 57 +25 40.0           ~ 4 0
28 HCL 2A PoC 04 39 58 +26 01.4           ~ 15 0
29 HCL 2E PoC 04 40 41.1 +25 28 35           ~ 9 0
30 NAME Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3281 0
31 HCL 2C PoC 04 41 08 +25 49.2           ~ 6 0
32 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1314 0
33 HCL 2G2 PoC 04 42 06 +25 27.4           ~ 2 0
34 LDN 1544B PoC 04 52 51 +25 45.9           ~ 3 0
35 LDN 1517C PoC 04 54 47.4 +30 34 48           ~ 20 0
36 LDN 1517A PoC 04 55 06.3 +30 33 40           ~ 25 0
37 NAME [BM89] L1517B cor 04 55 18.8 +30 38 04           ~ 126 0
38 LDN 1517 DNe 04 55 45 +30 33.0           ~ 92 0
39 V* AB Aur Ae* 04 55 45.8459978418 +30 33 04.293281305 7.20 7.16 7.05 6.96 6.70 A0Ve 895 2
40 LDN 1544C PoC 05 04 07 +25 15.3           ~ 3 0
41 LDN 1544A PoC 05 04 15.2 +25 11 48           ~ 3 0
42 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 642 0
43 NAME [BM89] L1544 cor 05 04 22.5 +25 11 36           ~ 434 1
44 HH 83 HH 05 33 32.52 -06 29 46.9           ~ 63 0
45 [HTM83] Cloudet B Cld 05 34 15.5 -05 19 17           ~ 2 0
46 NAME OMC1 Ridge reg 05 35 13.4 -05 23 07           ~ 120 0
47 [HTM83] Cloudet A Cld 05 35 13.5 -05 18 37           ~ 2 0
48 NAME OMC-1 MoC 05 35 14 -05 22.4           ~ 987 2
49 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 1924 1
50 M 42 HII 05 35 17.3 -05 23 28           ~ 3647 0
51 OMC 2 MoC 05 35 27 -05 10.1           ~ 373 1
52 NAME HH 1-2 HH 05 36 22.8 -06 46 03           ~ 199 1
53 NAME Ori A MoC 05 38 -07.1           ~ 2600 0
54 LDN 1641 MoC 05 39.0 -07 00           ~ 416 0
55 NAME Horsehead Nebula DNe 05 40 59.0 -02 27 30           ~ 427 0
56 LDN 1630 DNe 05 45.5 -00 59           ~ 344 0
57 2MASS J05460363-0014493 Y*O 05 46 03.63 -00 14 49.3           ~ 46 0
58 M 78 RNe 05 46 45.8 +00 04 45   8.0       ~ 332 0
59 NGC 2071 RNe 05 47 10 +00 18.0           ~ 600 1
60 NAME ORI MOL CLOUD MoC 05 56 -01.8           ~ 805 1
61 NAME Mon R2 HII 06 07 46.6 -06 22 59           ~ 631 2
62 GGD 12 HH 06 10 50.6 -06 11 50           ~ 59 1
63 NAME GGD 12-15 Cl* 06 10 51.0 -06 11 54           ~ 76 1
64 LDN 1605 DNe 06 32.8 +10 38           ~ 14 0
65 NAME ROSETTE MOL CLOUD MoC 06 34.7 +04 02           ~ 220 0
66 NGC 2264 OpC 06 40 58 +09 53.7     3.9     ~ 1539 1
67 NAME CMa R1 As* 07 08 21.3 -11 04 50           ~ 72 1
68 NAME Coalsack G2 MoC 12 31 29 -63 44.8           ~ 38 0
69 NAME Thumbprint Nebula DNe 12 44 55.6 -78 48 16           ~ 22 0
70 LDN 1778 DNe 15 39.9 -07 10           ~ 17 0
71 LBN 004.19+36.70 HII 15 50 49 -04 06.2           ~ 4 0
72 [CJ81] Feature 2 Cld 15 51 46.5 -03 32 21           ~ 2 0
73 LDN 134 MoC 15 53 36.3 -04 35 26           ~ 193 0
74 LDN 183 MoC 15 54 12.2 -02 49 42           ~ 672 1
75 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 2913 0
76 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 988 1
77 LDN 43 DNe 16 34 29.3 -15 47 11           ~ 132 1
78 Barnard 58 Cld 17 11 22.6 -40 35 04           ~ 7 0
79 SH 2-10 HII 17 19.0 -34 05           ~ 7 0
80 NGC 6334 HII 17 20 51 -36 06.9           ~ 556 0
81 NAME NGC 6334-I Cl* 17 20 53.35 -35 47 01.5           ~ 251 0
82 NAME Sgr B2 (North) Rad 17 47 20.2 -28 22 21           ~ 484 1
83 M 8 HII 18 03 37 -24 23.2           ~ 545 1
84 W 31c HII 18 10 29.1 -19 56 05           ~ 296 0
85 RAFGL 2136 SFR 18 22 26.8740 -13 30 17.177           ~ 232 0
86 SH 2-68 PN 18 24 58.4294144035 +00 51 36.016896875   16.0 16.5     DAOZ.6 118 1
87 OH 34.26 +0.15 SFR 18 53 18.54 +01 14 57.9           ~ 446 0
88 GAL 035.2-00.74 MoC 18 58 13 +01 40.6           ~ 151 0
89 IRAS 18556+0136 mul 18 58 13.1 +01 40 35           ~ 132 0
90 NAME CrA Complex reg 19 15 00.0 -37 30 00           ~ 100 1
91 LDN 663 DNe 19 36 55 +07 34.4           ~ 532 0
92 HBC 688 Em* 19 42 54.990 +23 24 14.89     15     ~ 40 1
93 LBN 061.50+00.29 HII 19 46 45.7 +25 12 56           ~ 62 0
94 SH 2-88 B HII 19 46 47.329 +25 12 45.62           ~ 150 2
95 CTB 82 Mas 20 01.7 +33 33           ~ 36 0
96 [KCW94] 069.540-00.975 HII 20 10 09.0 +31 31 35           ~ 166 1
97 IRAS 20081+3122 Y*O 20 10 09.036 +31 31 34.14           ~ 169 0
98 Onsala 1 Mas 20 10 09.2036 +31 31 36.090           ~ 177 0
99 SH 2-106 HII 20 27 26.8 +37 22 49           ~ 404 2
100 RAFGL 2591 Y*O 20 29 25.2650 +40 11 26.532   18       ~ 560 5
101 LDN 1155 DNe 20 43.5 +67 41           ~ 24 0
102 LDN 970 DNe 21 12 13.1 +47 23 23           ~ 65 0
103 LDN 1106 DNe 21 42 15.4 +56 43 44           ~ 21 0
104 NGC 7129 OpC 21 42 56 +66 06.2     11.5     ~ 230 0
105 IC 5146 SFR 21 53 24 +47 16.0   7.82 7.2     ~ 371 2
106 LDN 1235 DNe 22 14 55 +73 25.0           ~ 25 0
107 LDN 1188 DNe 22 16.7 +61 45           ~ 17 0
108 SH 2-140 OpC 22 19 07.8 +63 17 07           ~ 627 2
109 IRAS 22176+6303 SFR 22 19 17.978 +63 18 52.92           ~ 587 0
110 LDN 1204F cor 22 19 19.1 +63 18 51           ~ 5 0
111 LDN 1204E PoC 22 19 19.1 +63 18 51           ~ 4 0
112 LDN 1204G cor 22 19 19.1 +63 18 51           ~ 10 0
113 LDN 1204 DNe 22 26.7 +63 15           ~ 83 1
114 GAL 120.1+03.0 MoC 22 52 +55.0           ~ 3 0
115 NAME Cep F Cld 22 54 25.4 +62 09 42           ~ 24 0
116 NAME Cepheus A SFR 22 56 17.9 +62 01 49           ~ 689 2
117 NAME Cep A HW 2 Y*O 22 56 17.9 +62 01 49           B0.5 188 0
118 [THR85] Cep A-3 PoC 22 56 18.3 +62 02 26           ~ 8 0
119 NAME Cep C SFR 23 05 50.0 +62 30 01           ~ 29 0
120 [DB2002b] G89.19-40.94 MoC 23 08 24 +15 05.3           ~ 77 0
121 NGC 7538 OpC 23 13 37 +61 30.0           ~ 814 0
122 LDN 1253 DNe 23 56 32 +58 31.7           ~ 52 0
123 LDN 1257 DNe 23 57 32 +59 39.7           ~ 21 0
124 NAME LDN 1204/SH 2-140 Complex ~ ~ ~           ~ 4 0

    Equat.    Gal    SGal    Ecl

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2019.09.15-10:25:32

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