2009A&A...508L...5P


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.22CEST20:16:55

2009A&A...508L...5P - Astronomy and Astrophysics, volume 508, L5-8 (2009/12-2)

How universal are the two young cluster sequences?. The cases of the LMC, SMC, M 83, and the Antennae.

PFALZNER S. and ECKART A.

Abstract (from CDS):

Recently a new analysis of cluster observations in the Milky Way found evidence that clustered star formation may work under tight constraints with respect to cluster size and density, implying that only two sequences exist. Our aim is to investigate whether similar sequences can be found in other nearby galaxies. This is done using data of cluster properties from the literature. For the extragalactic young stellar clusters we detect an overall trend in the cluster-density scaling that is comparable to the relation obtained for Galactic clusters, although differences may exist. For the LMC and SMC clusters, the densities are below the Galactic data points and/or the core radii are smaller than those of data points with comparable density. For M 83 and the Antenna clusters, the core radii are possibly comparable to the Galactic clusters but it is unclear whether they have similar expansion speeds. These findings should serve as an incentive to performing more systematic observations and analysis to answer the question of why there may be a similarity between young Galactic and extragalactic star cluster sequences.

Abstract Copyright:

Journal keyword(s): Local Group - open clusters and associations: general - Magellanic Clouds - Galaxy: structure

Simbad objects: 46

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Number of rows : 46

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 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9765 1
2 NGC 330 Cl* 00 56 20.59 -72 27 12.5 9.37 9.76 9.55   8.89 ~ 372 0
3 NGC 869 OpC 02 19 00 +57 07.7           ~ 437 0
4 NGC 884 OpC 02 22 23 +57 07.5           ~ 453 0
5 IC 1805 OpC 02 32 42 +61 27.0   7.03 6.5     ~ 484 2
6 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5907 1
7 HD 268850 AB* 05 02 21.463 -66 06 38.32   11.83 11.55 12.43   ~ 88 0
8 NGC 1805 GlC 05 02 21.690 -66 06 39.43           ~ 105 0
9 NGC 1818 GlC 05 04 13.300 -66 26 05.47   9.7       ~ 239 0
10 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15303 1
11 NGC 1984 Cl* 05 27 40 -69 08.1   10.00 9.99     ~ 76 0
12 NGC 2004 Cl* 05 30 41.340 -67 17 21.83   9.6       ~ 266 0
13 NGC 2011 Cl* 05 32 19 -67 31.3   10.62 10.58     ~ 70 0
14 Ass Ori OB 1b As* 05 34.0 -01 30           ~ 241 0
15 Ass Ori OB 1c As* 05 35 21 -05 20.5           ~ 129 1
16 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1785 1
17 NGC 2100 Cl* 05 42 07.200 -69 12 26.99   9.6       ~ 183 0
18 NGC 2244 OpC 06 31 55 +04 56.5           ~ 573 1
19 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49   11.59 10.5     ~ 295 0
20 NGC 3603 OpC 11 15 18.6 -61 15 26           ~ 975 1
21 NGC 3606 GiG 11 16 15.645 -33 49 38.67   13.42   11.72   ~ 59 0
22 [BTK2009] T343 Cl* 12 01 50.537 -18 52 06.60           ~ 2 0
23 [BTK2009] T324 Cl* 12 01 52.085 -18 52 31.90           ~ 2 0
24 [BTK2009] T54 Cl* 12 01 52.119 -18 52 07.30           ~ 3 0
25 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1581 0
26 [BTK2009] T270 Cl* 12 01 53.345 -18 53 07.60           ~ 3 0
27 [BTK2009] T367 Cl* 12 01 54.749 -18 52 12.90           ~ 2 0
28 [BTK2009] T365 Cl* 12 01 54.928 -18 52 15.40           ~ 2 0
29 NGC 4228 SBG 12 15 39.174 +36 19 36.80 10.63 10.30 9.93 9.74   ~ 881 1
30 NAME Lower Centaurus Crux As* 12 19 -57.1           ~ 378 1
31 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2298 2
32 [L2004] n5236-805 Cl* 13 37 01.8403502593 -29 52 13.381157236   16.37 16.14     ~ 20 0
33 [L99] n5236-502 Cl* 13 37 06.12 -29 53 18.4     17.51     ~ 12 0
34 NAME Upper Centaurus Lupus As* 15 24 -41.9           ~ 381 1
35 NAME Upper Sco Association As* 16 12 -23.4           ~ 1095 1
36 Cl Westerlund 1 OpC 16 47 04.00 -45 51 04.9           ~ 486 0
37 NAME Arches Cluster Cl* 17 45 50.5 -28 49 28           ~ 649 0
38 NAME Quintuplet Cluster OpC 17 46 13.9 -28 49 48           ~ 463 0
39 M 16 OpC 18 18 48 -13 48.4   6.58 6.0     ~ 959 2
40 RSGC 1 OpC 18 37 58 -06 53.0           ~ 92 0
41 Cl Stephenson 2 OpC 18 39 20 -06 01.7           ~ 88 0
42 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 823 0
43 NAME I Lac As* 22 41 +38.5           ~ 145 0
44 NGC 7380 OpC 22 47 21 +58 07.9   7.62 7.2     ~ 174 0
45 Ass Ori OB 1a As* ~ ~           ~ 204 0
46 NAME Local Group GrG ~ ~           ~ 7238 0

    Equat.    Gal    SGal    Ecl

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2021.04.22-20:16:55

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