2009A&A...498L..37P

Query : 2009A&A...498L..37P

2009A&A...498L..37P - Astronomy and Astrophysics, volume 498, L37-40 (2009/5-1)

Universality of young cluster sequences.

PFALZNER S.

Abstract (from CDS):

Most stars do not form in isolation but as part of a cluster comprising anywhere between a few dozen to several million stars with stellar densities ranging from 0.01 to several 105M☉/pc3. The majority of these clusters dissolve within 20Myr. The general assumption is that clusters are born more or less over this entire density range. A new analysis of cluster observations is presented. It demonstrates that, in fact, clustered star formation works under surprisingly tight constraints with respect to cluster size and density. The observed multitude of cluster densities simply results from snapshots of two sequences evolving in time along pre-defined tracks in the density-radius plane. This implies that the cluster size can actually be used to determine its age.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: open clusters and associations: general

CDS comments: Fig.1 Cl 1806-20 is NAME 1806-20 STAR CLUSTER in Simbad. DBS2003 is here [DBS2003] 179 in Simbad.

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 - 2024 		#notes
1 NGC 869 OpC 02 18 57.8 +57 08 02           ~ 476 0
2 NGC 884 OpC 02 22 20.2 +57 08 56           ~ 486 0
3 NAME IRAS 02232+6138 Cluster OpC 02 27 09 +61 52.5           ~ 11 0
4 IC 1805 OpC 02 32 50.4 +61 28 16           ~ 519 1
5 NAME W 5 East MoC 03 01 32 +60 29.2           ~ 128 2
6 IC 348 OpC 03 44 31.7 +32 09 32           ~ 1392 1
7 Ass Ori OB 1b As* 05 34.0 -01 30           ~ 266 0
8 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2331 0
9 Ass Ori OB 1c As* 05 35 21 -05 20.5           ~ 137 1
10 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1154 1
11 Ass Mon R 2 As* 06 07 47.8 -06 22 55           ~ 47 1
12 NGC 2244 OpC 06 32 10.8 +04 54 50           ~ 634 1
13 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49           ~ 356 0
14 Cl Trumpler 14 OpC 10 43 56.6 -59 33 11   5.70 5.5     ~ 509 0
15 NGC 3603 OpC 11 15 10.8 -61 15 32           ~ 1065 1
16 NGC 3606 GiG 11 16 15.6187337112 -33 49 39.076894848   13.42   11.72   ~ 63 0
17 NAME Lower Centaurus Crux As* 12 19 -57.1           ~ 477 1
18 NAME Upper Centaurus Lupus As* 15 24 -41.9           ~ 472 1
19 NAME Upper Sco Association As* 16 12 -23.4           ~ 1369 1
20 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1330 1
21 V* U Sco CV* 16 22 30.7791646104 -17 52 43.166822628           F8+K2 549 0
22 Cl Westerlund 1 Cl* 16 47 02.4 -45 51 07           ~ 566 0
23 [DBS2003] 179 OpC 17 11 32.0 -39 10 38           ~ 39 0
24 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14407 0
25 GCIRS 16 Cl* 17 45 40.0 -29 00 28           ~ 362 0
26 NAME Arches Cluster Cl* 17 45 50.5 -28 49 28           ~ 736 0
27 NAME Quintuplet Cluster OpC 17 46 13.9 -28 49 48           ~ 525 0
28 NAME 1806-20 Star Cluster OpC 18 08 39.0 -20 24 39           ~ 35 1
29 M 16 OpC 18 18 45.1 -13 47 31           ~ 1028 1
30 RSGC 1 OpC 18 37 58 -06 53.0           ~ 106 0
31 Cl Stephenson 2 OpC 18 39 20 -06 01.7           ~ 93 0
32 NGC 6823 OpC 19 43 10.6 +23 19 16   7.71 7.1     ~ 270 2
33 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 943 0
34 NAME I Lac As* 22 41 +38.5           ~ 151 0
35 NGC 7380 OpC 22 47 16 +58 07.5           ~ 190 0
36 Ass Gem OB 4 As* ~ ~           ~ 5 0
37 Ass Ori OB 1a As* ~ ~           ~ 230 0

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