2004A&A...413..929G

Query : 2004A&A...413..929G

2004A&A...413..929G - Astronomy and Astrophysics, volume 413929-937 (2004/1-3)

The dynamical evolution of fractal star clusters: The survival of substructure.

GOODWIN S.P. and WHITWORTH A.P.

Abstract (from CDS):

We simulate the dynamics of fractal star clusters, in order to investigate the evolution of substructure in recently formed clusters. The velocity dispersion is found to be the key parameter determining the survival of substructure. In clusters with a low initial velocity dispersion, the ensuing collapse of the cluster tends to erase substructure, although some substructure may persist beyond the collapse phase. In clusters with virial ratios of 0.5 or higher, initial density substructure survives for several crossing times, in virtually all cases. Even an initially homogeneous cluster can develop substructure, if it is born with coherent velocity dispersion. These results suggest that the simple initial conditions used for many sophisticated N-body simulations could be missing a very important and dramatic phase of star cluster evolution.

Abstract Copyright: ∼

Journal keyword(s): stellar dynamics - open clusters and associations: general

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	IC 348	OpC	03 44 31.1	+32 10 02						~	1476	1

Query : 2004A&A...413..929G

Basic data :

IC 348 -- Open Cluster
Other object types:	`OpC (2013A&A,OCISM,...)`, `Cl* (2020A&A,C,...)`, `ISM (Ced,[T70],...)`, `As* (2019AJ,[KC2019])`, `RNe (DG,[WBR2005])`, `HII (LBN)`, `SFR (2013MNRAS)`, `* (IC)`
ICRS coord. (ep=J2000) :	`03 44 31.1 +32 10 02 (Optical) [ ] E 2023A&A...674A..37G`
FK4 coord. (ep=B1950 eq=1950) :	`03 41 22.7 +32 00 38 [ ]`
Gal coord. (ep=J2000) :	`160.4791 -17.8058 [ ]`
Proper motions mas/yr :	`4.483 -6.447 [0.052 0.049 90] C` `2020A&A...633A..99C`
Radial velocity / Redshift / cz :	`V(km/s) 15.44 [0.08] / z(spectroscopic) 0.000052 [0.000000] / cz 15.44 [0.08] (Opt) A 2021A&A...647A..19T`
Parallaxes (mas):	`3.079 [0.013] C` `2020A&A...633A..99C`
Angular size (arcmin):	`480.0 480.0 0 (~) C` `2022A&A...664A..66M`

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`IC 348`	`LBN 758`	`[BDB2003] G160.48-17.81`	`[T70] 1`
`C 0341+321`	`NAME Gingrich 1`	`[BDB2003] G160.40-17.72`	`[TP72] 5`
`Ced 20`	`NAME omi Per Cloud`	`[C2000b] 1`	`[WBR2005] J034434.1+320946`
`Cl Collinder 41`	`OCISM 99`	`[KC2019] Theia 17`
`DG 23`	`OCl 409`	`[KPR2004b] 46`
`LBN 160.47-17.86`	`OCl 409.0`	`[KPS2012] MWSC 0301`

References (1476 between 1850 and 2026) (Total 1476)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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