2002A&A...391..857H

Query : 2002A&A...391..857H

2002A&A...391..857H - Astronomy and Astrophysics, volume 391857-873 (2002/9-1)

The star cluster system of the NGC 7673 starburst.

HOMEIER N., GALLAGHER III J.S. and PASQUALI A.

Abstract (from CDS):

We investigate the star cluster system in the starburst galaxy NGC 7673 using archival Hubble Space Telescope WFPC2 broad-band images. For the first time we are able to examine the internal structures of the prominent optical clumps in this galaxy. The clumps are composed of young stars, 16-33% of which are in bright star clusters. We identify 268 star cluster candidates in both the F555W and F814W images, and 50 clusters with the F255W filter. These data allow us to estimate ages and masses using color-magnitude and two-color diagrams for our sample. We find a population of young, <6Myr clusters located throughout the galaxy with concentrations in the clumps. Star cluster mass estimates are 5-50x104M☉ for the brightest objects. The starburst remains active in physically well-separated regions, indicating a widespread starburst trigger. We discuss clump lifetimes, their implications for the future evolution of NGC 7673, and possible relationships to high redshift starbursts.

Abstract Copyright: ∼

Journal keyword(s): galaxies: evolution - galaxies: starburst - galaxies: individual: NGC 7673 - galaxies: interactions - galaxies: star clusters

VizieR on-line data: <Available at CDS (J/A+A/391/857): table2.dat>

Nomenclature: Fig.9, Table 2: [HGP2002] ANN (Nos A1-A12, B1-B8, C1-C12), [HGP2002] aNN (Nos f1-f18).

Simbad objects: 64

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Number of rows : 64
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 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
2 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
3 NGC 3310 AGN 10 38 45.85707 +53 30 11.8940   12.45 12.15     ~ 809 1
4 NGC 4038 EmG 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1364 1
5 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1749 0
6 NGC 4039 GiP 12 01 53.51 -18 53 10.3   11.08   9.77   ~ 1173 1
7 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2
8 [HGP2002] f15 Cl* 23 27 40.66 +23 35 23.7           ~ 2 0
9 [HGP2002] f8 Cl* 23 27 40.69 +23 35 19.5           ~ 2 0
10 [HGP2002] f17 Cl* 23 27 40.71 +23 35 25.6           ~ 2 0
11 [DA82] Clump F PoG 23 27 40.76 +23 35 25.4           ~ 5 0
12 [HGP2002] f7 Cl* 23 27 40.84 +23 35 20.1           ~ 2 0
13 [HGP2002] f14 Cl* 23 27 40.85 +23 35 24.4           ~ 2 0
14 [HGP2002] A12 Cl* 23 27 40.94 +23 35 21.1           ~ 2 0
15 [HGP2002] f6 Cl* 23 27 40.95 +23 35 18.3           ~ 2 0
16 [HGP2002] f12 Cl* 23 27 40.96 +23 35 23.7           ~ 2 0
17 [HGP2002] A8 Cl* 23 27 41.00 +23 35 20.2           ~ 2 0
18 [HGP2002] f13 Cl* 23 27 41.00 +23 35 24.6           ~ 2 0
19 [HGP2002] A10 Cl* 23 27 41.03 +23 35 20.6           ~ 2 0
20 [HGP2002] f5 Cl* 23 27 41.04 +23 35 18.0           ~ 2 0
21 [HGP2002] A11 Cl* 23 27 41.04 +23 35 20.9           ~ 2 0
22 NGC 7673 EmG 23 27 41.060 +23 35 20.18 12.84 13.17 12.76     ~ 282 2
23 [HGP2002] A9 Cl* 23 27 41.07 +23 35 20.6           ~ 2 0
24 [HGP2002] A7 Cl* 23 27 41.08 +23 35 20.2           ~ 2 0
25 [HGP2002] f18 Cl* 23 27 41.09 +23 35 29.1           ~ 2 0
26 [HGP2002] A6 Cl* 23 27 41.10 +23 35 20.1           ~ 2 0
27 [HGP2002] A5 Cl* 23 27 41.14 +23 35 19.4           ~ 2 0
28 [HGP2002] A4 Cl* 23 27 41.16 +23 35 19.5           ~ 2 0
29 [HGP2002] A1 Cl* 23 27 41.19 +23 35 18.9           ~ 2 0
30 [HGP2002] A3 Cl* 23 27 41.19 +23 35 19.5           ~ 2 0
31 [HGP2002] A2 Cl* 23 27 41.23 +23 35 19.7           ~ 2 0
32 [HGP2002] f9 Cl* 23 27 41.25 +23 35 23.0           ~ 2 0
33 [HGP2002] f4 Cl* 23 27 41.27 +23 35 16.0           ~ 2 0
34 [HGP2002] C11 Cl* 23 27 41.27 +23 35 27.1           ~ 2 0
35 [HGP2002] C7 Cl* 23 27 41.28 +23 35 25.9           ~ 2 0
36 [HGP2002] f3 Cl* 23 27 41.29 +23 35 16.0           ~ 2 0
37 [HGP2002] f11 Cl* 23 27 41.29 +23 35 23.9           ~ 2 0
38 [HGP2002] C6 Cl* 23 27 41.29 +23 35 25.6           ~ 2 0
39 [HGP2002] C2 Cl* 23 27 41.33 +23 35 25.1           ~ 2 0
40 [HGP2002] C4 Cl* 23 27 41.33 +23 35 25.6           ~ 2 0
41 [HGP2002] C8 Cl* 23 27 41.34 +23 35 26.4           ~ 2 0
42 [HGP2002] C10 Cl* 23 27 41.34 +23 35 27.1           ~ 2 0
43 [HGP2002] C5 Cl* 23 27 41.36 +23 35 26.0           ~ 2 0
44 [HGP2002] C12 Cl* 23 27 41.36 +23 35 27.8           ~ 2 0
45 [HGP2002] C3 Cl* 23 27 41.37 +23 35 25.7           ~ 2 0
46 [HGP2002] C9 Cl* 23 27 41.37 +23 35 27.3           ~ 2 0
47 [HGP2002] C1 Cl* 23 27 41.41 +23 35 25.2           ~ 2 0
48 [HGP2002] f10 Cl* 23 27 41.43 +23 35 24.1           ~ 2 0
49 [HGP2002] B7 Cl* 23 27 41.62 +23 35 30.7           ~ 2 0
50 [HGP2002] B3 Cl* 23 27 41.63 +23 35 29.9           ~ 2 0
51 [HGP2002] B8 Cl* 23 27 41.63 +23 35 31.2           ~ 2 0
52 [HGP2002] B2 Cl* 23 27 41.65 +23 35 29.6           ~ 2 0
53 [HGP2002] B5 Cl* 23 27 41.66 +23 35 30.4           ~ 2 0
54 [HGP2002] B1 Cl* 23 27 41.70 +23 35 29.9           ~ 2 0
55 [HGP2002] B4 Cl* 23 27 41.70 +23 35 30.5           ~ 2 0
56 [HGP2002] B6 Cl* 23 27 41.72 +23 35 30.8           ~ 2 0
57 [HGP2002] f1 Cl* 23 27 42.00 +23 35 16.9           ~ 2 0
58 [HGP2002] f2 Cl* 23 27 42.01 +23 35 17.2           ~ 2 0
59 NGC 7677 GiP 23 28 06.240 +23 31 53.19 13.93 13.93 13.19     ~ 130 1
60 [DA82] Clump A PoG ~ ~           ~ 6 0
61 [DA82] Clump B PoG ~ ~           ~ 6 0
62 [DA82] Clump E PoG ~ ~           ~ 3 0
63 [DA82] Clump D PoG ~ ~           ~ 5 0
64 [DA82] Clump C PoG ~ ~           ~ 6 0

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