2009MNRAS.396.1864M


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.21CET18:53:57

2009MNRAS.396.1864M - Mon. Not. R. Astron. Soc., 396, 1864-1874 (2009/July-2)

Limits on initial mass segregation in young clusters.

MOECKEL N. and BONNELL I.A.

Abstract (from CDS):

Mass segregation is observed in many star clusters, including several that are less than a few Myr old. Time-scale arguments are frequently used to argue that these clusters must be displaying primordial segregation, because they are too young to be dynamically relaxed. Looking at this argument from the other side, the youth of these clusters and the limited time available to mix spatially distinct populations of stars can provide constraints on the amount of initial segregation that is consistent with current observations. We present n-body experiments testing this idea, and discuss the implications of our results for theories of star formation. For system ages less than a few crossing times, we show that star formation scenarios predicting general primordial mass segregation are inconsistent with observed segregation levels.

Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): stellar dynamics - methods: {em N}-body simulations - stars: formation

Simbad objects: 13

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Number of rows : 13

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 NAME W3 IRS 5 Y*O 02 25 40.54 +62 05 51.4           B1 324 0
2 IC 1805 OpC 02 32 42 +61 27.0   7.03 6.5     ~ 468 2
3 NGC 1893 OpC 05 22 44 +33 24.7   7.90 7.5     ~ 227 0
4 C 0524+343 OpC 05 28 07.5 +34 25 42           ~ 52 0
5 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 1922 1
6 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1440 1
7 RMC 136 Cl* 05 38 42.396 -69 06 03.36   9.63 9.50     ~ 1689 2
8 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1060 1
9 NAME Mon R2 HII 06 07 46.6 -06 22 59           ~ 639 2
10 NGC 6231 OpC 16 54 08.51 -41 49 36.0   2.83 2.6     ~ 477 0
11 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11172 0
12 NAME Arches Cluster Cl* 17 45 50.5 -28 49 28           ~ 618 0
13 NGC 6530 OpC 18 04 31 -24 21.5   4.74 4.6     ~ 342 1

    Equat.    Gal    SGal    Ecl

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2020.01.21-18:53:57

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