2001A&A...372L..41M

Query : 2001A&A...372L..41M

2001A&A...372L..41M - Astronomy and Astrophysics, volume 372, L41-44 (2001/6-4)

A SCUBA survey of the NGC 2068/2071 protoclusters.

MOTTE F., ANDRE P., WARD-THOMPSON D. and BONTEMPS S.

Abstract (from CDS):

We report the results of a submillimeter dust continuum survey of the protoclusters NGC 2068 and NGC 2071 in Orion B carried out at 850µm and 450µm with SCUBA on JCMT. The mapped region is ∼32'x18' in size (∼4pcx2pc) and consists of filamentary dense cores which break up into small-scale (∼5000AU) fragments, including 70 starless condensations and 5 circumstellar envelopes/disks. The starless condensations, seen on the same spatial scales as protostellar envelopes, are likely to be gravitationally bound and pre-stellar in nature. Their mass spectrum, ranging from ∼0.3M☉ to ∼5M☉, is reminiscent of the stellar initial mass function (IMF). Their mass-size relation suggests that they originate from gravitationally-driven fragmentation. We thus argue that pre-collapse cloud fragmentation plays a major role in shaping the IMF.

Abstract Copyright: ∼

Journal keyword(s): ISM: clouds - ISM: structure - dust - stars: formation - stars: initial mass function - submillimeter

VizieR on-line data: <Available at CDS (J/A+A/372/L41): table1.dat>

Nomenclature: Table 1: [MAW2001] LBSNN-MMNN, [MAW2001] LBS10S-MM1, N=82.

Simbad objects: 97

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Number of rows : 97
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 LBS 2-17 PoC 05 46 24.0 +00 00 05           ~ 15 0
2 HGBS J054624.2-000000 Y*? 05 46 24.3 -00 00 01           ~ 9 0
3 [MAW2001] LBS17-MM2 smm 05 46 24.5 -00 00 22           ~ 1 0
4 [MAW2001] LBS17-MM3 smm 05 46 24.6 +00 00 13           ~ 1 0
5 HGBS J054626.7+000107 Y*? 05 46 26.8 +00 01 11           ~ 9 0
6 [MAW2001] LBS17-MM5 Y*? 05 46 27.6 +00 01 31           ~ 3 0
7 HGBS J054627.8-000053 Y*O 05 46 27.9 -00 00 52           ~ 26 0
8 HGBS J054627.9-000141 Y*? 05 46 28.1 -00 01 40           ~ 12 0
9 HGBS J054628.2+001927 Y*O 05 46 28.40 +00 19 27.1           ~ 21 1
10 [MAW2001] LBS18-MM2 smm 05 46 28.5 +00 21 41           ~ 2 0
11 [MAW2001] LBS18-MM3 smm 05 46 29.5 +00 20 16           ~ 1 0
12 [MAW2001] LBS18-MM4 smm 05 46 30.0 +00 19 52           ~ 1 0
13 [MAW2001] LBS17-MM8 smm 05 46 30.1 -00 01 07           ~ 1 0
14 LBS 2-15 PoC 05 46 30.3 +00 28 23           ~ 3 0
15 2MASS J05463064-0002349 Y*O 05 46 30.645 -00 02 34.97           ~ 33 0
16 [MAW2001] LBS17-MM10 Y*? 05 46 32.3 -00 00 40           ~ 8 0
17 [MAW2001] LBS17-MM11 smm 05 46 32.9 -00 00 23           ~ 1 0
18 [MAW2001] LBS17-MM12 smm 05 46 33.4 -00 00 12           ~ 1 0
19 [MAW2001] LBS17-MM13 smm 05 46 33.5 -00 00 02           ~ 1 0
20 [MAW2001] LBS10-MM1 smm 05 46 34.9 +00 00 32           ~ 1 0
21 HGBS J054635.1+000032 Y*? 05 46 35.5 +00 00 34           ~ 9 0
22 HGBS J054636.1+000547 Y*? 05 46 36.3 +00 05 49           ~ 8 0
23 2MASS J05463755+0000338 Y*O 05 46 37.551 +00 00 33.80           ~ 20 0
24 HGBS J054637.8+002704 cor 05 46 37.6 +00 26 58           ~ 6 0
25 [MAW2001] LBS10-MM4 smm 05 46 39.1 +00 00 33           ~ 1 0
26 HGBS J054640.3+000031 Y*? 05 46 39.1 +00 00 34           ~ 10 0
27 HGBS J054639.3+000110 Y*O 05 46 39.4 +00 01 11           ~ 11 0
28 HGBS J054643.0+000047 Y*O 05 46 43.0 +00 00 47           ~ 11 0
29 [MAW2001] LBS10S-MM1 smm 05 46 43.1 -00 01 42           ~ 1 0
30 [MAW2001] LBS10-MM8 smm 05 46 45.1 +00 00 18           ~ 1 0
31 LBS 2-10 PoC 05 46 45.1 +00 00 24           ~ 11 0
32 [MAW2001] LBS11-MM1 smm 05 46 45.3 +00 07 31           ~ 1 0
33 LBS 2-16 PoC 05 46 45.33 +00 02 40.0           ~ 6 0
34 LBS 2-11 PoC 05 46 45.6 +00 07 19           ~ 4 0
35 M 78 RNe 05 46 45.8 +00 04 45   8.0       ~ 375 0
36 [MAW2001] LBS11-MM2 smm 05 46 46.1 +00 07 09           ~ 1 0
37 [MAW2001] LBS11-MM3 smm 05 46 47.3 +00 07 27           ~ 2 0
38 HGBS J054647.3+000026 Y*O 05 46 47.69 +00 00 25.3           ~ 15 0
39 HGBS J054648.6+000121 Y*O 05 46 48.21 +00 01 33.2           ~ 11 0
40 [MAW2001] LBS10-MM11 smm 05 46 48.9 +00 01 22           ~ 1 0
41 [MAW2001] LBS10-MM12 smm 05 46 49.7 +00 00 20           ~ 1 0
42 HGBS J054650.0+000203 Y*? 05 46 50.0 +00 02 06           ~ 12 0
43 [MAW2001] LBS10-MM14 smm 05 46 50.7 +00 02 07           ~ 1 0
44 [MAW2001] LBS10-MM15 smm 05 46 51.4 +00 00 00           ~ 1 0
45 [MAW2001] LBS10-MM16 smm 05 46 52.8 +00 01 48           ~ 1 0
46 [MAW2001] LBS10-MM17 smm 05 46 54.2 -00 00 24           ~ 1 0
47 JCMTSF J054655.0+002326 Y*? 05 46 55.0 +00 23 25           ~ 5 0
48 [MAW2001] LBS8-MM2 smm 05 46 57.1 +00 20 10           ~ 1 0
49 HGBS J054657.2+002356 Y*O 05 46 57.2 +00 23 57           ~ 9 0
50 HGBS J054658.1+002429 Y*? 05 46 57.8 +00 24 30           ~ 7 0
51 [MAW2001] LBS8-MM4 smm 05 46 58.2 +00 20 12           ~ 1 0
52 [MAW2001] LBS8-MM6 smm 05 46 59.8 +00 20 26           ~ 1 0
53 [MAW2001] LBS8-MM7 G? 05 47 00.260 +00 20 37.41           ~ 5 0
54 JCMTSF J054701.0+002620 Y*? 05 47 01.0 +00 26 19           ~ 8 0
55 [MAW2001] LBS8-MM9 smm 05 47 01.1 +00 20 37           ~ 1 0
56 2MASS J05470160+0017594 Y*O 05 47 01.605 +00 17 59.43           ~ 18 0
57 [MAW2001] LBS8-MM11 smm 05 47 02.0 +00 20 45           ~ 1 0
58 [MAW2001] LBS8-MM12 smm 05 47 02.7 +00 22 55           ~ 1 0
59 [MAW2001] LBS8-MM13 smm 05 47 03.2 +00 19 40           ~ 1 0
60 [MAW2001] LBS8-MM14 smm 05 47 03.3 +00 22 35           ~ 1 0
61 [MAW2001] LBS8-MM15 smm 05 47 03.6 +00 19 54           ~ 1 0
62 JCMTSF J054703.8+002008 smm 05 47 03.6 +00 20 08           ~ 3 0
63 LBS 2-8 PoC 05 47 04.1 +00 21 42           ~ 5 0
64 [MAW2001] LBS8-MM17 smm 05 47 04.2 +00 20 23           ~ 1 0
65 HGBS J054704.6+001459 cor 05 47 04.6 +00 14 59           ~ 7 0
66 [PGS81] IRS 1 Y*O 05 47 04.78 +00 21 42.8           ~ 82 0
67 HGBS J054704.8+002145 Y*O 05 47 05.00 +00 21 45.1           ~ 9 0
68 HGBS J054705.2+001324 Y*? 05 47 05.2 +00 13 21           ~ 9 0
69 [MAW2001] LBS8-MM19 smm 05 47 06.4 +00 22 36           ~ 2 0
70 HGBS J054706.5+001232 Y*? 05 47 06.6 +00 12 32           ~ 9 0
71 [MAW2001] LBS8-MM20 smm 05 47 07.5 +00 22 46           ~ 1 0
72 HGBS J054707.9+002508 Y*? 05 47 07.9 +00 25 07           ~ 5 0
73 [MAW2001] LBS8-MM22 smm 05 47 08.221 +00 22 50.58           ~ 1 0
74 NGC 2071 RNe 05 47 10 +00 18.0           ~ 645 1
75 2MASS J05471062+0021149 Y*O 05 47 10.62744 +00 21 14.9616           ~ 23 0
76 [MAW2001] LBS8-MM24 smm 05 47 10.7 +00 22 29           ~ 1 0
77 SSV LDN 1630 37 IR 05 47 11.0 +00 21 19           ~ 2 0
78 [MAW2001] LBS8-MM25 smm 05 47 11.9 +00 22 45           ~ 1 0
79 [MAW2001] LBS8-MM26 smm 05 47 12.4 +00 23 27           ~ 1 0
80 HGBS J054712.7+002223 cor 05 47 12.6 +00 22 23           ~ 8 0
81 [MAW2001] LBS6-MM1 smm 05 47 14.3 +00 21 30           ~ 1 0
82 HGBS J054715.3+001839 Y*O 05 47 15.3 +00 18 34           ~ 7 0
83 HGBS J054716.0+002123 Y*O 05 47 16.0 +00 21 24           ~ 14 0
84 [MAW2001] LBS6-MM3 smm 05 47 17.2 +00 21 27           ~ 1 0
85 HGBS J054724.9+002058 Y*O 05 47 24.81 +00 20 59.9           ~ 17 0
86 HGBS J054725.1+001847 Y*? 05 47 25.1 +00 18 49           ~ 7 0
87 LBS 2-6 PoC 05 47 25.4 -00 18 17           ~ 3 0
88 HGBS J054726.1+001956 Y*? 05 47 26.2 +00 19 56           ~ 7 0
89 [MAW2001] LBS6-MM7 smm 05 47 26.5 +00 20 45           ~ 1 0
90 [MAW2001] LBS6-MM8 smm 05 47 29.8 +00 20 39           ~ 1 0
91 2MASS J05473239+0020217 Y*O 05 47 32.395 +00 20 21.77           ~ 13 0
92 HGBS J054735.0+002022 Y*? 05 47 35.1 +00 20 21           ~ 6 0
93 IRAS 05450+0019 Or* 05 47 36.67056 +00 20 06.0360           ~ 32 0
94 HGBS J054736.9+002005 Y*O 05 47 36.9 +00 20 07           ~ 9 0
95 LBS 2-5 PoC 05 47 37.1 +00 19 30           ~ 3 0
96 LBS 2-7 PoC ~ ~           ~ 4 0
97 LBS 2-18 PoC ~ ~           ~ 6 0

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