THE VELOCITY DISTRIBUTION OF HYPERVELOCITY STARS

We consider the process of stellar binaries tidally disrupted by a supermassive black hole (BH). For highly eccentric orbits, as one star is ejected from the three-body system, the companion remains bound to the BH. Hypervelocity stars (HVSs) observed in the Galactic halo and S-stars observed orbiti...

Full description

Saved in:
Bibliographic Details
Published in:The Astrophysical journal 2014-11, Vol.795 (2), p.1-13
Main Authors: Rossi, Elena M, Kobayashi, Shiho, Sari, Re'em
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BLACK HOLES
COMPARATIVE EVALUATIONS
Computer simulation
DETECTION
DISTRIBUTION
Ejection
GALAXIES
Hypervelocity
INJECTION
MASS
Mathematical analysis
Mathematical models
ORBITS
Separation
SPACE
STAR EVOLUTION
STARS
SUPERMASSIVE STARS
THREE-BODY PROBLEM
VELOCITY
Velocity distribution
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We consider the process of stellar binaries tidally disrupted by a supermassive black hole (BH). For highly eccentric orbits, as one star is ejected from the three-body system, the companion remains bound to the BH. Hypervelocity stars (HVSs) observed in the Galactic halo and S-stars observed orbiting the central BH may originate from such mechanism. In this paper, we predict the velocity distribution of the ejected stars of a given mass, after they have traveled out of the Galactic potential. We use both analytical methods and Monte Carlo simulations. We find that each part of the velocity distribution encodes different information. At low velocities
ISSN:1538-4357
0004-637X
1538-4357
DOI:10.1088/0004-637X/795/2/125