publication . Preprint . Article . 2009

On the origin of the hypervelocity runaway star HD 271791

V. V. Gvaramadze;
Open Access English
  • Published: 27 Sep 2009
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.
Subjects
arXiv: Astrophysics::Galaxy AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Solar and Stellar AstrophysicsAstrophysics::Earth and Planetary Astrophysics
free text keywords: Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies, Astronomy and Astrophysics, Physics, Binary star, O-type main-sequence star, Peculiar velocity, Star cluster, Astronomy, Astrophysics, Stars, Star count, Intergalactic star, X-ray binary
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publication . Preprint . Article . 2009

On the origin of the hypervelocity runaway star HD 271791

V. V. Gvaramadze;