The initial distribution and evolution of globular cluster systems

Baumgardt, H. (1998) The initial distribution and evolution of globular cluster systems. Astronomy and Astrophysics, 330 2: 480-491.

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Author Baumgardt, H.
Title The initial distribution and evolution of globular cluster systems
Journal name Astronomy and Astrophysics   Check publisher's open access policy
ISSN 0004-6361
1432-0746
Publication date 1998-02
Sub-type Article (original research)
Open Access Status File (Publisher version)
Volume 330
Issue 2
Start page 480
End page 491
Total pages 12
Place of publication Les Ulis, France
Publisher E D P Sciences
Language eng
Formatted abstract
This work considers the evolution of globular cluster systems in galaxies. Here globular cluster systems start with
power-law mass functions φ ∼ M−α with slopes around 2.0, similar to what has been observed for the young luminous clusters
seen in merging and interacting galaxies. We then follow the orbits of the clusters through their parent galaxy, allowing
various destruction mechanisms to dissolve them. In comparing the surviving distribution to the observed one, we show that
our model can reproduce several aspects of present day globular cluster systems.
This method is employed to the globular clusters of the Milky Way and M87. In the case of the Milky Way we obtain
luminosity distributions, which depend on the galactocentric distance in a way similar to what is observed. We also observe
a change in the velocity distribution of the globular cluster system, which predicts a different kinematical state of the surviving
halo clusters compared to the halo stars. The final luminosity function of the globular cluster system in M87 can differ from
the one found for the Milky Way clusters, which casts doubt on the use of globular cluster luminosity functions to measure
distances. We also discuss some implications of our results for the dynamical history of M87.
Keyword Galaxy : globular clusters : general
galaxies : star clusters
gaiaxies : individual : M87
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
 
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