2002A&A...391..441K


Query : 2002A&A...391..441K

2002A&A...391..441K - Astronomy and Astrophysics, volume 391, 441-452 (2002/8-4)

Extragalactic globular clusters in the near infrared. I. A comparison between M87 and NGC 4478.

KISSLER-PATIG M., BRODIE J.P. and MINNITI D.

Abstract (from CDS):

We compare optical and near infrared colours of globular clusters in M87, the central giant elliptical in Virgo, and NGC 4478, an intermediate luminosity galaxy in Virgo, close in projection to M87. Combining V and I photometry obtained with the WFPC2 on HST and Ks photometry obtained with the NIRC on Keck 1, we find the broad range in colour and previously detected bi-modality in M87. We confirm that NGC 4478 only hosts a blue sub-population of globular clusters and now show that these clusters' V-I and V-K colours are very similar to those of the halo globular clusters in Milky Way and M31. Most likely, a metal-rich sub-population never formed around this galaxy (rather than having formed and been destroyed later), probably because its metal-rich gas was stripped during its passage through the centre of the Virgo cluster. The V-I, V-K colours are close to the predicted colours from SSP models for old populations. However, M87 hosts a few red clusters that are best explained by intermediate ages (a few Gyr). Generally, there is evidence that the red, metal-rich sub-population has a complex colour structure and is itself composed of clusters spanning a large metallicity and, potentially, age range. This contrasts with the blue, metal-poor population which appears very homogeneous in all galaxies observed so far.

Abstract Copyright:

Journal keyword(s): galaxies clusters: general - galaxies: star clusters - galaxies: individual: M87, NGC 4478

Nomenclature: Table 2: KPBM redNN (Nos red1 to red10).

Simbad objects: 25

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Number of rows : 25
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11447 1
2 NGC 1316 GiP 03 22 41.789 -37 12 29.52 9.81 9.15 8.53 7.66   ~ 1244 1
3 FS 110 * 03 41 02.4 +06 56 13   13.90 13.20     G5 13 0
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15540 1
5 GSPC P545-C * 08 29 25.1181719843 +05 56 08.410122023           ~ 11 0
6 GSPC P550-C * 10 33 51.9 +04 49 05           ~ 10 0
7 FS 132 * 12 21 39.2798102356 -00 07 12.150160494   13.88 13.33     G1 18 0
8 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 1994 2
9 NGC 4478 GiP 12 30 17.439 +12 19 42.88 12.82 12.36 11.45   10.17 ~ 477 1
10 KPBM red5 GlC 12 30 47.18 +12 23 16.6           ~ 1 0
11 KPBM red6 GlC 12 30 47.46 +12 22 55.3           ~ 1 0
12 [JPB2009] 187.6983828+12.3833857 GlC 12 30 47.6119 +12 23 00.189           ~ 2 0
13 KPBM red10 GlC 12 30 47.82 +12 22 38.4           ~ 1 0
14 KPBM red8 GlC 12 30 48.14 +12 23 12.9           ~ 1 0
15 KPBM red9 GlC 12 30 48.52 +12 23 11.9           ~ 1 0
16 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6477 3
17 KPBM red4 GlC 12 30 50.01 +12 22 55.7           ~ 1 0
18 [JPB2009] 187.7090353+12.3813291 GlC 12 30 50.1685 +12 22 52.785           ~ 2 0
19 KPBM red1 GlC 12 30 50.57 +12 23 08.7           ~ 1 0
20 KPBM red2 GlC 12 30 51.16 +12 22 59.7           ~ 1 0
21 NGC 4874 LIN 12 59 35.709 +27 57 33.80 13.01 13.7 11.40 12.122 11.386 ~ 740 3
22 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4389 2
23 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 4123 3
24 GSC 04985-00648 * 14 40 57.9502317983 -00 27 46.145836662   14.04 13.32 13.29   F8 16 0
25 NGC 7252 IG 22 20 44.7751096408 -24 40 41.905677809 12.26 12.46 12.06 11.57   ~ 674 1

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2021.09.27-18:32:19

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