On the origin of the hypervelocity runaway star HD271791
Solar and Stellar Astrophysics
2015-05-14 v1 Astrophysics of Galaxies
Abstract
We discuss the origin of the runaway early B-type star HD271791 and show that its extremely high velocity (\simeq 530-920 km/s) cannot be explained within the framework of the binary-supernova ejection scenario. Instead, we suggest that HD271791 attained its peculiar velocity in the course of a strong dynamical encounter between two hard massive binaries or via an exchange encounter between a hard massive binary and a very massive star, formed through runaway mergers of ordinary massive stars in the dense core of a young massive star cluster.
Keywords
Cite
@article{arxiv.0909.4928,
title = {On the origin of the hypervelocity runaway star HD271791},
author = {V. V. Gvaramadze},
journal= {arXiv preprint arXiv:0909.4928},
year = {2015}
}
Comments
6 pages, 1 figure, to appear in Star Clusters - Basic Galactic Building Blocks throughout Time and Space, Proceed. of the IAU Symp. 266, eds. R. de Grijs and J. Lepine