2005A&A...433..447C


Query : 2005A&A...433..447C

2005A&A...433..447C - Astronomy and Astrophysics, volume 433, 447-454 (2005/4-2)

The star cluster population of NGC 5253.

CRESCI G., VANZI L. and SAUVAGE M.

Abstract (from CDS):

We present a detailed analysis of the star cluster population in the starburst galaxy NGC 5253. Our work is based on HST optical and VLT Ks images. We detect more than 300 clusters, and for all of them we derive the photometry in the V, I and Ks bands and built a color-color V-I/V-Ks diagram. After correction for star contamination, we matched 115 sources in all the three bands V, I and Ks. Comparison of the data points with models shows that most of the sources are affected by a red excess. The ages of the younger clusters are obtained from an HST Hα image which makes it possible to partially remove the degeneracy between age and extinction and to calculate the screen optical depth toward the clusters. The V and Ks luminosity functions show a marked turnover at MV=-7.3 and MK=-10.2, with a shape roughly similar to the Gaussian distribution of old globular clusters. We convert the luminosity function into a mass function, and find that the clusters younger than 10Myr show a power law distribution with slope -1.6, while the distribution of the older clusters has a maximum at about 4x104M.

Abstract Copyright:

Journal keyword(s): galaxies: individual: NGC 5253 - galaxies: star clusters - galaxies: starburst

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5876 6
2 NGC 4038 EmG 12 01 53.002 -18 52 03.32   10.91   9.74 11.0 ~ 1335 1
3 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1695 0
4 NGC 4039 GiP 12 01 53.51 -18 53 10.3   11.08   9.77   ~ 1162 1
5 ACO 3526 ClG 12 48 51.8 -41 18 21           ~ 1072 2
6 NGC 5253 AGN 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1367 4
7 NAME NGC 5353 Radio Supernebula Cl* 13 39 56.007 -31 38 25.00           ~ 49 0

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