2011MNRAS.414.1793A


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.23CET22:12:59

2011MNRAS.414.1793A - Mon. Not. R. Astron. Soc., 414, 1793-1812 (2011/July-1)

The massive star clusters in the dwarf merger ESO 185-IG13: is the red excess ubiquitous in starbursts?

ADAMO A., OSTLIN G., ZACKRISSON E. and HAYES M.

Abstract (from CDS):

We have investigated the starburst properties of the luminous blue compact galaxy ESO 185-IG13. The galaxy has been imaged with the high-resolution cameras onboard the Hubble Space Telescope. From the ultraviolet (UV) to the infrared (IR), the data reveal a system shaped by hundreds of young star clusters, and fine structures, like a tidal stream and a shell. The presence of numerous clusters and the perturbed morphology indicate that the galaxy has been involved in a recent merger event. Using previous simulations of shell formation in galaxy mergers we constrain potential progenitors of ESO 185-IG13. The analysis of the star cluster population is used to investigate the properties of the present starburst and to date the final merger event, which has produced hundreds of clusters younger than 100 Myr. We have found a peak of cluster formation only 3.5 Myr old. A large fraction of these clusters will not survive after 10–20 Myr due to the `infant mortality' caused by gas expulsion. However, this sample of clusters represents a unique chance to investigate the youngest phases of cluster evolution. As already observed in the analogue blue compact galaxy Haro 11, a fraction of young clusters are affected by a flux excess at wavelengths longer than 8000 Å. Ages, masses and extinctions of clusters with this near-IR (NIR) excess are estimated from UV and optical data. We discuss similarities and differences of the observed NIR excess in ESO 185-IG13 clusters with other cases in the literature. The cluster ages and masses are used to distinguish among the potential causes of the excess. We observe, as in Haro 11, that the use of the IR and the (commonly used) I band data results in overestimates of age and mass in clusters affected by the NIR excess. This has important implications for a number of related studies of star clusters.

Based on observations made with the NASA/ESA HST, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-26555.


Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): galaxies: irregular - galaxies: starburst - galaxies: star clusters: individual: ESO 185-IG13

Nomenclature: Table 2: [AOZ2011] NNN N=14 among (Nos 56-344).

Simbad objects: 23

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Number of rows : 23

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ESO 350-38 AGN 00 36 52.489 -33 33 17.23   14.31 14.41 13.49   ~ 286 0
2 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 2888 2
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9230 1
4 NGC 346 Cl* 00 59 05.090 -72 10 33.24           ~ 443 0
5 SNR B0057-72.2 SNR 00 59 27.40 -72 10 10.7   12.37 12.57     ~ 216 0
6 NGC 602 Cl* 01 29 32.133 -73 33 38.13     13.018     ~ 77 1
7 6dFGS gJ014131.0-653656 G 01 41 30.9771174241 -65 36 56.079376445   14.76       ~ 17 0
8 SBSG 0335-052B G 03 37 44.04 -05 02 40.2   16.77 16.65   16.79 ~ 143 1
9 SBSG 0335-052 bCG 03 37 44.04 -05 02 38.5     16.65     ~ 426 1
10 NGC 1569 IG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1143 3
11 NGC 1709 GiG 04 58 44.002 -00 28 41.90   15.6       ~ 21 0
12 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14544 1
13 ESO 495-21 bCG 08 36 15.190 -26 24 33.66 12.04 11.93 11.45 11.09 12.3 ~ 491 3
14 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1543 0
15 NGC 4194 AGN 12 14 09.615 +54 31 35.93   13.79 13.30     ~ 406 2
16 NGC 4449 EmG 12 28 11.118 +44 05 36.81 10.11 9.98 9.64 9.45   ~ 1005 1
17 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 3937 3
18 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 3723 4
19 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2187 2
20 NGC 5253 AGN 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33   ~ 1254 4
21 ESO 338-4 IG 19 27 58.338 -41 34 30.81   13.55 13.21 13.14 13.43 ~ 206 1
22 ESO 185-13 AGN 19 45 00.549 -54 15 02.91 14.77 14.94 14.68 14.49 14.19 ~ 45 0
23 Mrk 930 AGN 23 31 58.630 +28 56 50.51 14.27 15.04 14.63 14.56 14.46 ~ 120 0

    Equat.    Gal    SGal    Ecl

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2020.02.23-22:12:59

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