2007ApJ...659.1198E

Query : 2007ApJ...659.1198E

2007ApJ...659.1198E - Astrophys. J., 659, 1198-1211 (2007/April-3)

The ARAUCARIA project: VLT-FORS spectroscopy of blue supergiants in NGC 3109. Classifications, first abundances, and kinematics.

EVANS C.J., BRESOLIN F., URBANEJA M.A., PIETRZYNSKI G., GIEREN W. and KUDRITZKI R.-P.

Abstract (from CDS):

We have obtained multiobject spectroscopy of luminous blue supergiants in NGC 3109, a galaxy at the periphery of the Local Group at ∼1.3 Mpc. We present a detailed catalog including finding charts, V and I magnitudes, spectral classifications, and stellar radial velocities. The radial velocities are seen to trace the rotation curves obtained from studies of the H I gas. From quantitative analysis of eight B-type supergiants we find a mean oxygen abundance of 12+log(O/H)=7.76±0.07 (1 σ systematic uncertainty), with a median result of 7.8. Given its distance, we highlight NGC 3109 as the ideal example of a low-metallicity, dark-matter-dominated dwarf galaxy for observations with the next generation of ground-based extremely large telescopes.

Abstract Copyright: ∼

Journal keyword(s): galaxies: individual (DDO 236) - Galaxies: Individual: NGC Number: NGC 3109 - Galaxies: Stellar Content - Stars: Early-Type - Stars: Fundamental Parameters

VizieR on-line data: <Available at CDS (J/ApJ/659/1198): table2.dat>

Nomenclature: Table 2: [EBU2007] NN (Nos 1-91).

Simbad objects: 94

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Number of rows : 94
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 SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 [EBU2007] 56 * 10 02 46.1554023024 -26 09 55.549771272     20.14   20.31 B 1 0
3 [EBU2007] 26 * 10 02 46.3103918424 -26 09 47.077766820     19.48   19.67 B3Ib 1 0
4 [EBU2007] 54 * 10 02 46.5970948752 -26 09 12.631150836     20.10   20.28 B1-3II-Ib 1 0
5 [EBU2007] 86 * 10 02 46.720 -26 09 47.27     21.15   21.13 BII 1 0
6 [EBU2007] 39 * 10 02 46.970 -26 10 14.34     19.79   19.96 O9.5II: 1 0
7 [EBU2007] 81 * 10 02 46.9978938000 -26 09 45.377103168     20.75   20.91 B1:Ib 1 0
8 [EBU2007] 57 * 10 02 47.120 -26 10 14.27     20.15   20.48 B 1 0
9 [EBU2007] 37 s*b 10 02 47.3191004568 -26 09 45.170189820     19.73   19.84 B2Iab 2 0
10 [EBU2007] 78 * 10 02 49.470 -26 08 45.18     20.54   20.78 O9.5III 1 0
11 [EBU2007] 19 s*b 10 02 49.6731038208 -26 09 22.069298088     19.32   19.47 B1Ia 1 0
12 [EBU2007] 72 * 10 02 49.7377818264 -26 09 43.059541392     20.40   20.37 A0Ib: 1 0
13 [EBU2007] 9 s*b 10 02 49.770 -26 08 45.04     18.78   18.98 B0.5Ia 3 0
14 [EBU2007] 53 * 10 02 51.400 -26 09 35.02     20.07   20.23 B0:Ib 1 0
15 [EBU2007] 64 * 10 02 51.4341037728 -26 08 47.171688252     20.25   20.28 B0-2 1 0
16 [EBU2007] 52 * 10 02 51.7969563024 -26 09 42.190508988     20.07   20.04 A0Ib 1 0
17 [EBU2007] 6 s*b 10 02 53.0107188120 -26 09 51.691650516     18.62   18.57 B8Ia 2 0
18 [EBU2007] 8 * 10 02 53.1774489864 -26 09 37.069922484     18.76   18.46 A7II 1 0
19 [EBU2007] 58 s*b 10 02 53.2947993888 -26 09 49.015317240     20.17   20.30 B9:Iab 1 0
20 [EBU2007] 51 * 10 02 54.4784204376 -26 09 03.673189008     20.05   20.31 B 1 0
21 [EBU2007] 7 s*b 10 02 54.7210416000 -26 08 59.662367808     18.69   18.95 B0-1Ia 6 0
22 [EBU2007] 47 * 10 02 55.1301578448 -26 10 07.232083968     19.99   20.11 B2.5Ib 1 0
23 [EBU2007] 30 sg* 10 02 55.5701013768 -26 09 54.824128416     19.54   19.55 A0Iab 2 0
24 [EBU2007] 31 * 10 02 55.5873219888 -26 10 03.613594260     19.54   19.70 B1-2Ib 1 0
25 [EBU2007] 46 * 10 02 55.6378815528 -26 08 58.325348796     19.98   20.29 B 1 0
26 [EBU2007] 48 * 10 02 56.2346939808 -26 08 58.244588124     19.99   20.18 OIf 2 0
27 [EBU2007] 38 * 10 02 56.570 -26 09 55.58     19.77   19.61 B1-3III 1 0
28 [EBU2007] 73 sg* 10 02 57.3456191400 -26 09 50.143410360     20.43   20.40 A0:Iab 1 0
29 [EBU2007] 18 * 10 02 57.8023079880 -26 08 33.211774068     19.21   19.02 B1I 1 0
30 [EBU2007] 44 * 10 02 58.6426163664 -26 09 57.990831876     19.95   20.03 BIb 2 0
31 [EBU2007] 11 s*b 10 02 58.6582988424 -26 09 50.917884480     18.91   18.99 B0I 3 0
32 [EBU2007] 70 s*b 10 02 59.0093443008 -26 08 11.516386416     20.36   20.66 B5Ia 1 0
33 [EBU2007] 90 * 10 02 59.310 -26 09 12.72     21.73   21.42 A7II: 1 0
34 [EBU2007] 14 * 10 02 59.5907322264 -26 09 12.406711536     19.03   17.32 G2I 1 0
35 [EBU2007] 49 * 10 02 59.7425946480 -26 09 24.336878508     20.00   20.22 O9II 2 0
36 [EBU2007] 22 s*b 10 02 59.880 -26 09 12.60     19.36   19.57 B1Ia 3 0
37 [EBU2007] 63 * 10 03 00.100 -26 09 28.72     20.25   20.67 O 1 0
38 [EBU2007] 89 * 10 03 00.810 -26 09 28.20     21.68   21.16 A5:II 1 0
39 [EBU2007] 42 * 10 03 01.4091492528 -26 08 26.613985920     19.86   20.10 B0-2 2 0
40 [EBU2007] 66 * 10 03 01.4436863112 -26 08 01.420615536     20.29   20.23 O 1 0
41 [EBU2007] 27 s*b 10 03 01.850 -26 09 08.91     19.49   19.49 B2.5Ia 1 0
42 [EBU2007] 24 s*b 10 03 01.9558967712 -26 09 00.959204556     19.46   19.47 B2-3Iab 1 0
43 [EBU2007] 84 * 10 03 02.430 -26 09 21.49     20.95   20.59 A5II 1 0
44 [EBU2007] 33 * 10 03 02.5166903760 -26 09 36.007740000     19.57   19.75 O9If 5 0
45 [EBU2007] 68 sg? 10 03 02.6357423712 -26 09 30.545193096     20.33   20.33 A0Iab: 1 0
46 [EBU2007] 20 * 10 03 03.220 -26 09 21.41     19.33   19.47 O8I 8 0
47 [EBU2007] 32 * 10 03 03.4727635584 -26 08 45.974837184     19.57   19.32 A3II 2 0
48 [EBU2007] 55 * 10 03 04.040 -26 09 10.30     20.12   20.47 B0-2 1 0
49 [EBU2007] 77 * 10 03 05.030 -26 09 23.78     20.52   20.52 O 1 0
50 [EBU2007] 83 * 10 03 05.0714382072 -26 08 56.000063652     20.85   20.53 A3II 1 0
51 [EBU2007] 5 s*b 10 03 05.4429999000 -26 08 56.451823764     18.54   18.49 B8Ia 3 0
52 [EBU2007] 88 * 10 03 05.600 -26 09 17.03     21.41   21.41 B 1 0
53 [EBU2007] 85 * 10 03 05.670 -26 09 21.20     20.98   20.52 B 1 0
54 [EBU2007] 74 * 10 03 05.770 -26 09 11.36     20.44   20.44 B0-2II: 1 0
55 [EBU2007] 79 * 10 03 05.830 -26 09 06.92     20.55   20.55 B9Ib 1 0
56 NGC 3109 AG? 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 825 2
57 [EBU2007] 12 s*b 10 03 07.090 -26 09 41.26     18.92   18.81 B8Ia 1 0
58 [EBU2007] 69 * 10 03 07.760 -26 09 17.48     20.36   20.49 B 1 0
59 [EBU2007] 87 * 10 03 07.810 -26 10 17.77     21.32   21.21 B 1 0
60 [EBU2007] 60 * 10 03 08.170 -26 10 18.11     20.22   20.39 B0-0.5 2 0
61 [EBU2007] 13 sg* 10 03 08.510 -26 09 57.31     19.02   18.86 A0Iab 2 0
62 [EBU2007] 28 s*b 10 03 08.5197305472 -26 09 22.565545848     19.51   19.46 B2.5Iab 1 0
63 [EBU2007] 76 * 10 03 09.4255362576 -26 09 50.397263640     20.51   20.12 B9-A0Ib 1 0
64 [EBU2007] 21 sg* 10 03 09.960 -26 08 27.11     19.33   19.18 A0Iab 2 0
65 [EBU2007] 16 * 10 03 10.060 -26 09 48.53     19.05   18.70 A7II 1 0
66 [EBU2007] 50 * 10 03 10.6454871480 -26 09 23.474160576     20.05   20.07 B8:Ib 1 0
67 [EBU2007] 82 * 10 03 10.900 -26 10 08.34     20.81   20.23 F2:I 1 0
68 [EBU2007] 43 * 10 03 11.730 -26 10 18.00     19.94   20.13 O9.5I 2 0
69 [EBU2007] 41 sg* 10 03 11.850 -26 10 08.64     19.81   19.76 A0Iab 1 0
70 [EBU2007] 1 sg* 10 03 11.930 -26 09 29.01     17.81   17.53 A2Ia 2 0
71 [EBU2007] 80 * 10 03 12.060 -26 10 14.97     20.70   20.81 B1-2 1 0
72 [EBU2007] 29 s*b 10 03 12.500 -26 10 14.81     19.54   19.52 B8Ia 2 0
73 [EBU2007] 15 s*b 10 03 13.100 -26 09 35.61     19.04   19.05 B5Ia 1 0
74 [EBU2007] 65 * 10 03 13.390 -26 08 03.31     20.26   20.45 B 1 0
75 [EBU2007] 35 * 10 03 13.650 -26 09 55.76     19.70   19.85 O8-9.5I(f) 2 0
76 [EBU2007] 71 * 10 03 14.150 -26 10 06.71     20.37   20.20 B9-A0Ib: 1 0
77 [EBU2007] 34 * 10 03 14.240 -26 09 16.96     19.61   19.86 O8I(f) 6 0
78 [EBU2007] 75 * 10 03 14.340 -26 09 57.82     20.49   19.80 F2I 1 0
79 [EBU2007] 62 * 10 03 14.600 -26 10 06.00     20.24   20.06 A5II 1 0
80 [EBU2007] 40 * 10 03 14.720 -26 09 57.40     19.81   19.86 B8Ib 2 0
81 [EBU2007] 59 * 10 03 15.310 -26 09 24.64     20.21   20.40 B0-3 1 0
82 [EBU2007] 61 * 10 03 16.540 -26 10 20.96     20.23   20.34 B? 2 0
83 [EBU2007] 45 * 10 03 16.550 -26 09 38.46     19.97   19.87 B8-A0I 1 0
84 [EBU2007] 4 s*b 10 03 16.740 -26 09 22.90     18.36   18.22 B9Ia 2 0
85 [EBU2007] 3 s*b 10 03 17.7677565312 -26 10 01.522608276     18.07   18.13 B1Ia 2 0
86 [EBU2007] 23 * 10 03 19.950 -26 09 55.01     19.44   19.30 A1Iab 2 0
87 [EBU2007] 17 * 10 03 20.210 -26 06 44.62     19.17   18.91 A3II 2 0
88 [EBU2007] 25 * 10 03 22.950 -26 10 30.91     19.47   19.36 A0Iab 2 0
89 [EBU2007] 67 * 10 03 24.640 -26 09 35.03     20.31   19.97 A5II 1 0
90 [EBU2007] 10 * 10 03 26.630 -26 08 54.24     18.80   18.72 B:e 1 0
91 [EBU2007] 91 * 10 03 27.180 -26 10 06.11     22.22   21.01 B1-2e 1 0
92 [EBU2007] 2 * 10 03 27.470 -26 10 06.41     18.05   17.88 Be 1 0
93 [EBU2007] 36 * 10 03 29.560 -26 08 39.96     19.71   19.52 B 1 0
94 NAME Local Group GrG ~ ~           ~ 9325 0

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