2005A&A...443..851S

Query : 2005A&A...443..851S

2005A&A...443..851S - Astronomy and Astrophysics, volume 443851-861 (2005/12-1)

The IMF of the field population of 30 Doradus.

SELMAN F.J. and MELNICK J.

Abstract (from CDS):

The star-formation history and IMF of the field population of the 30 Doradus super-association is determined using Wide Field Imager photometry. The cluster NGC 2070 and the OB association LH104 are also studied and used for comparison. The star-formation history of the 30 Doradus super-association appears to be characterized by a large increase in star-formation activity 10Myr to 20Myr ago. This seems to be the case across the whole eastern half of the LMC as demonstrated by the ages of stellar populations as far away as 30 Doradus and Shapley's Constellation III. Star-formation appears to be occurring at a constant rate in the field and in loose associations, and in bursts in the clusters. The field IMF is found to have almost the exact Salpeter slope in the range 7M☉≤M≤40M☉, at odds with previous claims. We find that, for objects with more complex star-formation histories, Be stars and selective incompleteness strongly affect the determination of the IMF for M>40M☉, naturally explaining the observed deviation of the high mass IMF slope from the Salpeter value. The present work supports the idea of a universal IMF.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - galaxies: stellar content - galaxies: Magellanic Clouds - galaxies: star clusters - techniques: photometric - methods: statistical

VizieR on-line data: <Available at CDS (J/A+A/443/851): table2.dat table3.dat>

Nomenclature: Table 2: [SM2005] NNNNNNNN N=12993 among (Nos 11000001-18001448).

Simbad objects: 110

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Number of rows : 110
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 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
3 NGC 2044 As* 05 36 11 -69 11.8   10.69 10.59     ~ 89 0
4 LH 96 As* 05 37 15 -69 29.2           ~ 24 0
5 CPD-69 448 * 05 38 15.368 -69 04 03.51   13.06 12.84     B3Ib 10 0
6 H88 301 Cl* 05 38 16 -69 04.0   11.18 10.89     ~ 80 0
7 VFTS 283 Be* 05 38 16.9995 -69 03 49.010   15.3 15.31     B1.5V-III(n)e 14 0
8 2MASS J05381763-6904119 * 05 38 17.639 -69 04 11.92   15.72 13.96     ~ 19 0
9 [HBC93] 275 SB* 05 38 17.7214649592 -69 03 38.550007728   14.97 14.85     B5II-Ib 23 0
10 [HBC93] 250 Be* 05 38 17.9907375098 -69 04 09.662066378   14.91 14.731   14.488 B2III-II(n)e 15 0
11 CPD-69 449 * 05 38 18.3077404056 -69 04 02.246083932   13.32 13.19     A0Ib 8 0
12 Cl* NGC 2070 MEL B3 * 05 38 20.9205414240 -69 03 50.017511412   14.32 13.84     A5Ib 9 0
13 Cl* NGC 2070 SMB 107 * 05 38 29.4292054848 -69 05 21.207909696   14.99 14.80     O9.7 12 0
14 Cl* NGC 2070 MEL 54 s*b 05 38 35.9491 -69 06 09.195   13.27 13.02   12.60 B0.5IaNwk 16 0
15 NAME 30 Dor Nebula SFR 05 38 36.0 -69 05 11           ~ 1276 2
16 Cl* NGC 2070 MEL 52 * 05 38 36.0550753608 -69 06 46.549165104   13.94 13.51   12.95 B1Ia:Nwk 15 0
17 RMC 138 sg* 05 38 36.1321603320 -69 05 57.971373360   12.07 11.74   11.45 A0Ia 34 0
18 [P93] 538 s*b 05 38 36.8574625728 -69 06 46.152663408   15.75 15.11   14.19 B0.5Ia+((n))Nwk 15 0
19 RMC 137 s*b 05 38 36.9624548664 -69 05 07.874900232   12.12 12.02   12.05 B1Ia 33 0
20 Cl* NGC 2070 SMB 208 SB* 05 38 37.9834 -69 06 15.183   15.89 15.71   15.17 O7:V(n):+O7:V(n): 8 0
21 Cl* NGC 2070 MEL 50 SB* 05 38 38.4788632824 -69 06 22.016378160   13.80 13.655   13.314 O9.7III:+O7:: 28 0
22 OGLE LMC175.3 24041 SB* 05 38 38.75 -69 06 13.1   14.99 14.84   14.549 O5:V:n 17 0
23 BAT99 97 WR* 05 38 38.8401788208 -69 06 49.549699584   14.23 13.74   13.20 O3.5If*/WN7 33 0
24 Cl* NGC 2070 SMB 365 * 05 38 39.2702170272 -69 06 39.020203332   16.92 16.38   15.36 O5:Vn 16 0
25 Cl* NGC 2070 SMB 72 * 05 38 39.4792951992 -69 05 10.410902700   14.64 14.78   14.87 O5V 10 0
26 [P93] 724 * 05 38 39.6926027424 -69 06 24.060286944   14.51 14.19 15.01 13.97 O6:V: 9 0
27 Cl* NGC 2070 MH 53 * 05 38 40.1514 -69 05 51.233   15.14 15.00   14.67 O3/6V 8 0
28 Cl* NGC 2070 SMB 80 * 05 38 40.7995410744 -69 05 25.157960520   14.596 14.65   14.47 O5.5V 9 0
29 Cl* NGC 2070 MEL 25 SB* 05 38 41.5495267078 -69 05 19.506347564   13.33 13.31   13.36 ON2V((n))((f*)) 31 0
30 NGC 2070 Cl* 05 38 42 -69 06.0     7.25     ~ 406 1
31 [P93] 930 s*b 05 38 42.2168 -69 06 25.538   13.92 13.76   13.62 B0Ia 19 0
32 OGLE LMC-ECL-21440 SB* 05 38 42.66 -69 06 35.8   14.96 14.76   14.447 O3V(n)((f*))z+OB 19 0
33 [P93] 977 * 05 38 42.7 -69 05 38     15.2     O6:V 3 0
34 RMC 142 s*b 05 38 42.7360833048 -69 05 42.617961852   12.11 11.82   11.59 B0Ia 39 0
35 BAT99 113 WR* 05 38 43.0917715292 -69 05 46.903118899   13.56 13.47   13.44 O2If*/WN5 53 0
36 Cl* NGC 2070 MEL 26 * 05 38 44.4177 -69 05 36.154   13.75 13.66   13.59 O4III(f) 17 0
37 MH 31 * 05 38 44.5650276384 -69 04 51.259890828   14.11 14.05     O3III(f*) 24 0
38 [P93] 1209 * 05 38 45.1 -69 04 46   15.95 15.649     O9.5V: 2 0
39 RMC 141 s*b 05 38 45.5859 -69 05 47.772   12.71 12.49   12.36 BN0.5Ia 32 0
40 CPD-69 457 s*b 05 38 45.706536 -69 06 22.48020 11.233 12.094 11.996 12.419 10.066 B0.5Ia 24 0
41 W61 7-7 SB* 05 38 46.1994 -69 06 16.007   13.88 13.80   13.73 O3III(f*) 23 0
42 Cl* NGC 2070 MH 986 * 05 38 46.2817811664 -69 05 59.409391128   14.78 14.69   14.62 O5-6V((n))z 25 0
43 Cl* NGC 2070 MH 999 SB* 05 38 46.7865227544 -69 06 03.188070828   14.38 14.22   14.03 O4III(f) 27 0
44 W61 7-10 s*b 05 38 49.7234755368 -69 06 43.060485816 12.05 13.25 13.09   12.97 B0I 21 0
45 W61 7-12 SB* 05 38 50.4026954184 -69 05 38.266265256   14.24 14.16   14.17 O5.5IV(f) 21 0
46 W61 7-16 * 05 38 51.2007715584 -69 05 59.386365744   14.3 14.24   14.30 O7.5III(n)((f))p 19 0
47 W61 7-19 * 05 38 52.7246801448 -69 06 43.267945464 13.481 14.132 13.937   13.702 O7II(f) 26 0
48 Cl* NGC 2070 SMB 118 * 05 38 52.8331888920 -69 06 12.120967908   15.1 15.03   15.09 O6V((f)) 14 0
49 NGC 2074 As* 05 39 03 -69 29.9           ~ 66 0
50 [SL63] 639 As* 05 39 39 -69 12.1   12.13 11.53     ~ 31 0
51 UCAC2 1803593 * 05 39 41.7909494520 -69 24 30.310699932   15.49 15.6     B2III 5 0
52 OGLE LMC-ECL-21821 EB* 05 39 42.4235773104 -69 23 00.870326556   15.97 16.1   16.103 B1V 8 0
53 UCAC2 1803596 * 05 39 42.657 -69 23 47.85   14.78 14.8     B1V 4 0
54 [ST92] 4-3 * 05 39 42.7698 -69 23 52.013   16.03 16.2     B2V 4 0
55 2MASS J05394395-6923553 * 05 39 43.9577917800 -69 23 55.337129124   16.32 16.4     B2V 5 0
56 [M2002] LMC 173832 * 05 39 44.9912460024 -69 24 50.824325592   16.70 16.7     B2V 5 0
57 [M2002] LMC 173842 * 05 39 45.4395 -69 23 21.004   17.34 17.4     B1: 4 0
58 2MASS J05394718-6924105 * 05 39 47.19 -69 24 10.5   16.16 16.3     B1V 4 0
59 [ST92] 4-10 * 05 39 47.5195 -69 23 16.994   16.75 16.7     B2: 4 0
60 2MASS J05394820-6924165 * 05 39 48.21 -69 24 16.6 14.875 15.556 15.652   15.636 B1III 4 0
61 W61 4-1 LP* 05 39 48.4980131904 -69 23 15.726423768   14.82 14.480 14.31 14.060 B1I 12 0
62 2MASS J05394914-6923585 * 05 39 49.15 -69 23 58.5   16.19 16.2     B2V 4 0
63 2MASS J05394920-6924528 * 05 39 49.21 -69 24 52.8   16.05 16.1     B2V 4 0
64 W61 4-3 * 05 39 50.103 -69 23 14.28   13.97 14.0     B1I 6 0
65 W61 4-4 s*b 05 39 50.6881270464 -69 24 27.480143052 12.694 13.614 13.639   13.651 O5If 13 0
66 2MASS J05395140-6924136 * 05 39 51.40 -69 24 13.7   15.93 16.0     B1V 4 0
67 [M2002] LMC 173990 * 05 39 52.0039993776 -69 23 14.433514044   14.99 15.1     B1III 5 0
68 [ST92] 4-21 * 05 39 52.7893 -69 25 04.001   15.68 15.8     B1V 4 0
69 [M2002] LMC 174036 * 05 39 53.9174359368 -69 23 26.828711520   15.73 15.8     B1V 5 0
70 2MASS J05395430-6924350 * 05 39 54.31 -69 24 35.1   15.52 15.7     B2III 4 0
71 W61 4-6 EB* 05 39 54.8552859312 -69 24 10.242420444 13.070 13.943 14.150   14.290 O6.5III 9 0
72 [ST92] 4-27 * 05 39 55.1964855336 -69 24 39.801762504   15.22 15.4     B2III 5 0
73 [ST92] 4-28 * 05 39 55.5288811848 -69 24 29.949166620   15.59 15.8     B0.5V 5 0
74 UCAC2 1803624 * 05 39 56.032 -69 24 03.88   15.58 15.8     B1V 4 0
75 OGLE LMC-ECL-21928 EB* 05 39 56.9949226104 -69 25 01.403954652   15.19 15.4   15.424 B1III 8 0
76 [ST92] 4-31 * 05 39 57.5501 -69 23 35.012   17.29 17.3     B2V 4 0
77 W61 4-5 * 05 39 58.116 -69 24 14.64 13.511 14.334 14.414   14.426 O7V 6 0
78 [ST92] 4-34 * 05 39 58.4894 -69 24 17.007   16.52 16.5     B0.5V 4 0
79 LH 104 As* 05 39 59 -69 24.1   10.13 9.94     ~ 43 0
80 W61 4-9 * 05 39 59.4880744080 -69 24 40.412591208 13.762 14.643 14.754   14.840 O8V 7 0
81 [M2002] LMC 174165 * 05 39 59.6301 -69 23 54.979   16.87 17.0     B2V 4 0
82 [M2002] LMC 174166 * 05 39 59.6439603672 -69 23 34.167900660   16.44 16.6     B2III 4 0
83 [ST92] 4-38 * 05 40 00.5694 -69 24 47.988   16.61 16.7     B1V 4 0
84 [M2002] LMC 174216 * 05 40 02.3930223168 -69 23 38.550783264 14.522 15.215 15.426   15.580 B0V 5 0
85 W61 4-12 * 05 40 02.8962750408 -69 24 11.738137968 13.027 13.907 13.975   14.080 B0V 8 0
86 [ST92] 4-40 * 05 40 02.8980857496 -69 23 53.215959480 14.189 15.053 15.191   15.228 O8V 5 0
87 [M2002] LMC 174243 * 05 40 03.9509917128 -69 23 38.245279020 14.906 15.558 15.723   15.778 B2V 5 0
88 2MASS J05400430-6924153 * 05 40 04.30 -69 24 15.4   15.58 15.7     B2V 4 0
89 [M2002] LMC 174268 * 05 40 04.9402 -69 24 00.994   14.82 14.7     B0.5V 4 0
90 W61 4-14 * 05 40 05.8491092328 -69 23 45.211754364   14.97 14.9     A3V 5 0
91 W61 4-15 * 05 40 06.2652075840 -69 23 34.452929868 12.443 13.414 13.486   13.397 B1I 8 0
92 W61 4-17 * 05 40 07.4489734872 -69 24 21.836005704   14.11 15.6     G8III 4 0
93 [ST92] 4-49 * 05 40 07.9706 -69 23 38.005 17.024 17.651 17.443   17.782 B2V 4 0
94 UCAC2 1803659 * 05 40 08.0637180528 -69 24 13.009774716   15.34 15.5     B0.5V 5 0
95 [ST92] 4-51 * 05 40 08.6428018512 -69 24 31.007556864   16.04 16.2     B2III 5 0
96 W61 4-19 * 05 40 09.4014393384 -69 24 24.695056512   12.94 13.1     O8III(f) 6 0
97 [ST92] 4-53 * 05 40 09.4904 -69 23 45.009   17.64 17.7     B2: 4 0
98 W61 4-21 * 05 40 10.8140395988 -69 23 12.880345574     14.119 14.258 14.059 B0V 8 0
99 W61 4-20 * 05 40 11.2505648760 -69 23 58.973168976   14.26 13.5     G3V 5 0
100 2MASS J05401160-6924412 * 05 40 11.60 -69 24 41.2   17.83 16.9     K0/K1 3 0
101 [ST92] 4-59 * 05 40 12.3303 -69 23 58.001   16.11 16.1     B2V 4 0
102 [M2002] LMC 174433 * 05 40 12.8194911456 -69 24 18.034104492   17.06 16.5     F8V 3 0
103 W61 4-25 * 05 40 13.4589278376 -69 23 20.877642060 12.363 13.334 13.386   13.336 B1I 7 0
104 UCAC2 1803674 * 05 40 13.6428480744 -69 24 25.206752808   15.27 15.4     B0.5V 5 0
105 2MASS J05401546-6923445 * 05 40 15.47 -69 23 44.6   16.06 16.2     B2III 4 0
106 2MASS J05401556-6924095 * 05 40 15.570 -69 24 09.59   18.955 17.675   16.408 B2I 4 0
107 [M2002] LMC 174545 * 05 40 17.02 -69 24 35.8   17.22 16.0     G5V 3 0
108 LH 106 As* 05 40 29 -69 37.4           ~ 17 0
109 LH 111 As* 05 42 09 -69 12.6           ~ 28 0
110 KMHK 1274 As* 05 42 42 -69 03.7     11.05     ~ 28 0

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