2001A&A...379..781R

Query : 2001A&A...379..781R

2001A&A...379..781R - Astronomy and Astrophysics, volume 379781-797 (2001/12-1)

Stellar populations in NGC 5128 with the VLT: Evidence for recent star formation.

REJKUBA M., MINNITI D., SILVA D.R. and BEDDING T.R.

Abstract (from CDS):

We resolve stars of the nearest giant elliptical galaxy NGC 5128 using VLT with FORS1 and ISAAC. We construct deep U, V and Ks color-magnitude and color-color diagrams in two different halo fields (in the halo and in the north-eastern diffuse shell). In the outer, shell field, at ∼14kpc from the center of the galaxy, there is a significant recent star formation with stars as young as 10Myr, approximately aligned with the prominent radio and X-ray jet from the nucleus of the host AGN. Ionized gas filaments are evident in ultraviolet images near the area where neutral Hi and CO molecular gas was previously observed. The underlying stellar population of the halo of the giant elliptical is predominantly old with a very broad metallicity distribution. The presence of an extended giant branch reaching Mbol=-5mag suggests the existence of a significant intermediate-age AGB population in the halo of this galaxy.

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Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: stellar content - stars: fundamental parameters - galaxies: individual: NGC 5128

Simbad objects: 37

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Number of rows : 37
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 MCG-03-01-015 G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 782 2
2 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
4 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
5 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
6 [FG2000b] 39 * 13 26 01.1 -42 09 52   22.57 22.69     ~ 3 0
7 [FG2000b] 46 * 13 26 06.5 -42 50 38   23.20 22.89     ~ 2 0
8 [FG2000b] 42 * 13 26 07.7 -42 40 04   22.82 22.82     ~ 2 0
9 [FG2000b] 18 * 13 26 17.4 -42 48 42   22.31 22.01     ~ 2 0
10 [FG2000b] 33 * 13 26 19.7 -42 51 37   22.61 22.54     ~ 2 0
11 [FG2000b] 4 GlC 13 26 19.88 -42 49 11.5   21.19 21.07     ~ 5 0
12 [FG2000b] 30 * 13 26 20.3 -42 50 23   22.51 22.71     ~ 2 0
13 [FG2000b] 47 * 13 26 20.8 -42 50 21   22.85 22.90     ~ 2 0
14 [FG2000b] 13 * 13 26 21.0 -42 49 51   21.86 21.75     ~ 2 0
15 [FG2000b] 10 * 13 26 21.1 -42 49 45   21.71 21.65     ~ 3 0
16 [FG2000b] 35 * 13 26 21.2 -42 51 10   22.66 22.55     ~ 2 0
17 [FG2000b] 36 * 13 26 21.2 -42 49 42   22.50 22.58     ~ 2 0
18 [FG2000b] 1 * 13 26 21.3 -42 48 53   20.17 19.94     ~ 3 0
19 [FG2000b] 17 * 13 26 21.4 -42 49 10   22.29 21.95     ~ 2 0
20 [FG2000b] 26 * 13 26 21.4 -42 49 01   22.33 22.25     ~ 3 0
21 [FG2000b] 12 * 13 26 21.4 -42 50 22   21.93 21.72     ~ 3 0
22 [FG2000b] 50 * 13 26 21.4 -42 49 00   22.95 22.99     ~ 2 0
23 [FG2000b] 37 * 13 26 21.6 -42 49 09   22.60 22.58     ~ 2 0
24 [FG2000b] 27 * 13 26 21.6 -42 49 00   22.32 22.25     ~ 3 0
25 [FG2000b] 28 * 13 26 22.2 -42 49 31   22.35 22.40     ~ 3 0
26 [FG2000b] 48 * 13 26 22.8 -42 50 44   23.04 22.96     ~ 2 0
27 [FG2000b] 15 * 13 26 23.1 -42 50 47   21.95 21.86     ~ 2 0
28 [FG2000b] 32 * 13 26 23.5 -42 48 43   22.66 22.53     ~ 2 0
29 [FG2000b] 20 * 13 26 26.0 -42 50 32   22.17 22.10     ~ 2 0
30 [FG2000b] 16 * 13 26 27.3 -42 50 15   20.89 21.94     ~ 3 0
31 [FG2000b] 21 * 13 26 28.0 -42 50 12   22.04 22.12     ~ 2 0
32 [FG2000b] 7 * 13 26 28.1 -42 50 05   21.44 21.51     ~ 3 0
33 [FG2000b] 5 GlC 13 26 28.27 -42 50 03.9   21.23 21.19     ~ 3 0
34 NGC 6528 GlC 18 04 49.61 -30 03 20.8   12.12 10.65     ~ 561 0
35 NGC 6553 GlC 18 09 15.68 -25 54 27.9   9.08       ~ 644 0
36 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0
37 NAME Local Group GrG ~ ~           ~ 9325 0

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