@inproceedings{dad47a4c306d4c2c96a1f4079979099b,
title = "Collisions Between Single Stars in Dense Clusters: Runaway Formation of a Massive Object",
abstract = "Using Monte Carlo codes, we follow the collisional evolution of clusters in a variety of scenarios. We consider the conditions under which a cluster of main-sequence stars may undergo rapid core collapse due to mass segregation, thus entering a phase of runaway collisions, forming a very massive star (VMS, M* > 1000M⊙) through repeated collisions between single stars. Although collisional mass loss is accounted for realistically, we find that a VMS forms even in proto-galactic nuclei models with a high velocity dispersion (many 100 kms−1). Such a VMS may be a progenitor for an intermediate-mass black hole (M� ≥ 100M⊙). In contrast, in galactic nuclei hosting a central massive black hole, collisions are found to be disruptive. The stars which are subject to collisions are progressively ground down by high-velocity collisions and a merger sequence appears impossible.",
author = "Marcus Freitag and Guerkan, {M A} and Rasio, {Frederic A}",
year = "2007",
language = "English (US)",
isbn = "978-1-583812-35-8",
series = "Astronomical Society of the Pacific Conference Series",
publisher = "Astronomical Society of the Pacific",
pages = "707--713",
editor = "Nicole St.Louis and Moffat, {Anthony F L}",
booktitle = "Massive Stars in Interactive Binaries",
}