Query : 2005A&A...441..949G

2005A&A...441..949G - Astronomy and Astrophysics, volume 441, 949-960 (2005/10-3)

The star cluster population of M51. III. Cluster disruption and formation history.


Abstract (from CDS):

In this work we concentrate on the evolution of the cluster population of the interacting galaxy M51 (NGC 5194), more precisely the timescale of cluster disruption and possible variations in the cluster formation rate. We present a method to compare observed age vs. mass number density diagrams with predicted populations including various physical input parameters like the cluster initial mass function, cluster disruption, cluster formation rate and star bursts. If we assume that the cluster formation rate increases at the moments of the encounters with NGC 5195, we find an increase in the cluster formation rate of a factor of 3.0+4.6–1.2, combined with a disruption timescale which is slightly higher than when assuming a constant formation rate (t4=2.0+2.3–1.1x108yr vs. 1.0+0.6–0.5x108yr). The measured cluster disruption time is a factor of 5 shorter than expected on theoretical grounds. This implies that the disk of M51 is not a preferred location for survival of young globular clusters, since even clusters with masses on the order of 106M will be destroyed within a few Gyr.

Abstract Copyright:

Journal keyword(s): galaxies: spiral - galaxies: individual: M51 - galaxies: star clusters

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 M 51 GiP 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4205 4
2 NGC 5195 GiP 13 29 59.590 +47 15 58.06 10.76 10.45 9.55 9.31   ~ 755 3

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