1998AJ....116..119B

Query : 1998AJ....116..119B

1998AJ....116..119B - Astron. J., 116, 119-130 (1998/July-0)

A Hubble Space Telescope study of extragalactic OB Associations.

BRESOLIN F., KENNICUTT R.C.Jr, FERRARESE L., GIBSON B.K., GRAHAM J.A., MACRI L.M., PHELPS R.L., RAWSON D.M., SAKAI S., SILBERMANN N.A., STETSON P.B. and TURNER A.M.

Abstract (from CDS):

We present a study of OB associations, identified by objective means, in seven spiral galaxies observed with the Hubble Space Telescope as part of the Key Project on the distance scale. The properties of the associations, including their size distribution and average diameter, and the luminosity function of their brightest stars, do not vary significantly among galaxies, even for changes in Hubble type. These findings support previous suggestions about the existence of similarly sized elementary cells of star formation in galaxies, and the conclusion, obtained by others with more extensive data, that the upper stellar mass function does not vary significantly. The data suggest that the average number of stars in associations changes with morphological type, confirming previous studies of the integrated magnitudes of OB associations in H II regions.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Stellar Content

Nomenclature: Table 3: [BKF98] NGC 3621 NN (Nos 1-21), [BKF98] NGC 925 NN (Nos 1-17), [BKF98] NGC 2541 N (Nos 1-6), [BKF98] NGC 3351 N (Nos 1-9).

Simbad objects: 66

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Number of rows : 66
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
3 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
4 [BKF98] NGC 925 5 Cl* 02 27 04.6 +33 35 16     24.17     ~ 1 0
5 [BKF98] NGC 925 16 Cl* 02 27 05.1 +33 33 59     21.73     ~ 1 0
6 [BKF98] NGC 925 15 Cl* 02 27 05.2 +33 34 03     22.04     ~ 1 0
7 [BKF98] NGC 925 2 Cl* 02 27 05.6 +33 35 13     22.83     ~ 1 0
8 [BKF98] NGC 925 4 Cl* 02 27 05.8 +33 35 13     23.80     ~ 1 0
9 [BKF98] NGC 925 17 Cl* 02 27 06.2 -33 34 57     23.52     ~ 1 0
10 [BKF98] NGC 925 1 Cl* 02 27 06.3 +33 35 11     24.10     ~ 1 0
11 [BKF98] NGC 925 3 Cl* 02 27 06.8 +33 35 10     22.93     ~ 1 0
12 [BKF98] NGC 925 11 Cl* 02 27 06.9 +33 35 05     19.99     ~ 1 0
13 [BKF98] NGC 925 8 Cl* 02 27 08.4 +33 36 11     22.10     ~ 1 0
14 [BKF98] NGC 925 7 Cl* 02 27 08.4 +33 36 12     21.74     ~ 1 0
15 [BKF98] NGC 925 6 Cl* 02 27 08.5 +33 36 18     23.77     ~ 1 0
16 [BKF98] NGC 925 12 Cl* 02 27 08.8 +33 34 59     20.89     ~ 1 0
17 [BKF98] NGC 925 10 Cl* 02 27 09.8 +33 34 56     21.83     ~ 1 0
18 [BKF98] NGC 925 14 Cl* 02 27 10.1 +33 34 56     20.90     ~ 1 0
19 [BKF98] NGC 925 9 Cl* 02 27 10.6 +33 34 54     22.17     ~ 1 0
20 [BKF98] NGC 925 13 Cl* 02 27 11.1 +33 34 53     21.62     ~ 1 0
21 NGC 925 H2G 02 27 16.913 +33 34 43.97   10.69 10.12 9.55   ~ 818 1
22 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
23 NGC 2090 GiG 05 47 01.8557074752 -34 15 01.679264784 12.17 11.70 11.20 10.43 11.0 ~ 206 1
24 NGC 2541 GiG 08 14 40.1160678912 +49 03 42.021679932 12.03 12.26 11.80     ~ 333 1
25 [BKF98] NGC 2541 1 Cl* 08 14 40.8 +49 02 04     22.49     ~ 1 0
26 [BKF98] NGC 2541 3 Cl* 08 14 43.2 +49 01 56     21.76     ~ 1 0
27 [BKF98] NGC 2541 2 Cl* 08 14 43.7 +49 02 03     23.26     ~ 1 0
28 [BKF98] NGC 2541 6 Cl* 08 14 44.1 +49 01 40     23.15     ~ 1 0
29 [BKF98] NGC 2541 4 Cl* 08 14 45.7 +49 02 39     23.05     ~ 1 0
30 [BKF98] NGC 2541 5 Cl* 08 14 46.0 +49 02 45     22.75     ~ 1 0
31 [BKF98] NGC 3351 8 Cl* 10 43 49.1 +11 41 06     23.13     ~ 1 0
32 [BKF98] NGC 3351 9 Cl* 10 43 50.1 +11 41 12     23.26     ~ 1 0
33 [BKF98] NGC 3351 2 Cl* 10 43 52.8 +11 41 42     23.18     ~ 1 0
34 [BKF98] NGC 3351 1 Cl* 10 43 53.0 +11 41 38     22.82     ~ 1 0
35 [BKF98] NGC 3351 3 Cl* 10 43 53.2 +11 41 27     23.66     ~ 1 0
36 [BKF98] NGC 3351 7 Cl* 10 43 53.4 +11 41 09     22.64     ~ 1 0
37 [BKF98] NGC 3351 4 Cl* 10 43 54.5 +11 41 29     22.11     ~ 1 0
38 [BKF98] NGC 3351 6 Cl* 10 43 55.0 +11 40 17     21.96     ~ 1 0
39 [BKF98] NGC 3351 5 Cl* 10 43 57.4 +11 41 48     22.30     ~ 1 0
40 M 95 GiP 10 43 57.7313485800 +11 42 13.301191332 10.71 10.51 9.73 9.48   ~ 1238 2
41 [BKF98] NGC 3621 20 Cl* 11 18 14.2 -32 50 34     22.21     ~ 1 0
42 NGC 3621 Sy2 11 18 16.300 -32 48 45.36 10.10 9.44 9.56 8.07 10.1 ~ 661 3
43 [BKF98] NGC 3621 10 Cl* 11 18 18.0 -32 51 47     21.86     ~ 1 0
44 [BKF98] NGC 3621 11 Cl* 11 18 18.1 -32 51 39     21.90     ~ 1 0
45 [BKF98] NGC 3621 13 Cl* 11 18 18.1 -32 51 31     19.79     ~ 1 0
46 [BKF98] NGC 3621 17 Cl* 11 18 18.3 -32 51 21     23.10     ~ 1 0
47 [BKF98] NGC 3621 16 Cl* 11 18 18.4 -32 51 06     23.06     ~ 1 0
48 [BKF98] NGC 3621 12 Cl* 11 18 18.4 -32 50 57     20.89     ~ 1 0
49 [BKF98] NGC 3621 19 Cl* 11 18 18.5 -32 50 57     23.83     ~ 1 0
50 [BKF98] NGC 3621 18 Cl* 11 18 18.5 -32 50 49     21.78     ~ 1 0
51 [BKF98] NGC 3621 9 Cl* 11 18 18.5 -32 50 47     22.56     ~ 1 0
52 [BKF98] NGC 3621 14 Cl* 11 18 18.5 -32 50 47     23.45     ~ 1 0
53 [BKF98] NGC 3621 15 Cl* 11 18 18.5 -32 50 47     22.95     ~ 1 0
54 [BKF98] NGC 3621 21 Cl* 11 18 18.5 -32 50 39     22.04     ~ 1 0
55 [BKF98] NGC 3621 2 Cl* 11 18 18.9 -32 50 43     22.33     ~ 1 0
56 [BKF98] NGC 3621 1 Cl* 11 18 18.9 -32 50 33     22.69     ~ 1 0
57 [BKF98] NGC 3621 5 Cl* 11 18 19.0 -32 50 25     23.38     ~ 1 0
58 [BKF98] NGC 3621 3 Cl* 11 18 19.1 -32 50 14     20.87     ~ 1 0
59 [BKF98] NGC 3621 4 Cl* 11 18 19.1 -32 50 13     21.04     ~ 1 0
60 [BKF98] NGC 3621 7 Cl* 11 18 23.1 -32 50 54     19.36     ~ 1 0
61 [BKF98] NGC 3621 6 Cl* 11 18 23.5 -32 50 54     21.34     ~ 1 0
62 [BKF98] NGC 3621 8 Cl* 11 18 24.2 -32 50 55     20.97     ~ 1 0
63 M 91 LIN 12 35 26.4446761320 +14 29 46.760333748   14.63 13.57     ~ 639 0
64 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2
65 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
66 NAME Local Group GrG ~ ~           ~ 9325 0

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