Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-08-15
Astronomy and Astrophysics
Astrophysics
2 pages 1 figure (color), in the proceedings of Extragalactic Globular clusters and their host galaxies (JD6 in IAU)
Scientific paper
Our numerical simulations first demonstrate that the pressure of ISM in a major merger becomes so high ($>$ $10^5$ $\rm k_{\rm B}$ K $\rm cm^{-3}$) that GMCs in the merger can collapse to form globular clusters (GCs) within a few Myr. The star formation efficiency within a GMC in galaxy mergers can rise up from a few percent to $\sim$ 80 percent, depending on the shapes and the temperature of the GMC. This implosive GC formation due to external high pressure of warm/hot ISM can be more efficient in the tidal tails or the central regions of mergers. The developed clusters have King-like profile with the effective radius of a few pc. The structural, kinematical, and chemical properties of these GC systems can depend on orbital and chemical properties of major mergers.
Beasley Matthew A.
Bekki Kenji
Couch Warrick J.
Forbes Duncan A.
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