Open AccessThe fate of former companions to hypervelocity stars originating at the Galactic Centre
Author(s) -
Ginsburg Idan,
Loeb Abraham
Publication year - 2006
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2006.10091.x
Subject(s) - physics , hypervelocity , astrophysics , milky way , astronomy , stars , galaxy , black hole (networking) , galactic halo , binary star , halo , supermassive black hole , computer network , routing protocol , routing (electronic design automation) , computer science , link state routing protocol
The hypervelocity star SDSS J090745.0+024507 in the halo of the Milky Way galaxy most likely originated from the breakup of a binary star system by the central black hole, SgrA*. We examine the fate of former binary companions to similar hypervelocity stars (HVSs) by simulating 600 different binary orbits around SgrA* with a direct N ‐body integration code. For some orbital parameters, the binary breakup process leads to HVSs with ejection velocities that are almost an order of magnitude larger than the velocity observed for SDSS J090745.0+024507. The former companion stars populate highly eccentric orbits which resemble the observed orbits for some of the stars nearest to SgrA*.