Hypervelocity intracluster stars ejected by supermassive black hole binaries

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dc.creatorHolley-Bockelmann, Kelly
dc.creatorSigurdsson, Steinn
dc.creatorMihos, J. Christopher
dc.creatorFeldmeier, John J.
dc.creatorCiardullo, Robin
dc.creatorMcBride, Cameron
dc.date2005-12-13
dc.date.accessioned2026-07-07T06:49:07Z
dc.date.available2026-07-07T06:49:07Z
dc.descriptionHypervelocity stars have been recently discovered in the outskirts of galaxies, such as the unbound star in the Milky Way halo, or the three anomalously fast intracluster planetary nebulae (ICPNe) in the Virgo Cluster. These may have been ejected by close 3-body interactions with a binary supermassive black hole (SMBBH), where a star which passes within the semimajor axis of the SMBBH can receive enough energy to eject it from the system. Stars ejected by SMBBHs may form a significant sub-population with very different kinematics and mean metallicity than the bulk of the intracluster stars. The number, kinematics, and orientation of the ejected stars may constrain the mass ratio, semimajor axis, and even the orbital plane of the SMBBH. We investigate the evolution of the ejected debris from a SMBBH within a clumpy and time-dependent cluster potential using a high resolution, self-consistent cosmological N-body simulation of a galaxy cluster. We show that the predicted number and kinematic signature of the fast Virgo ICPNe is consistent with 3-body scattering by a SMBBH with a mass ratio $10:1$ at the center of M87.
dc.description4 pages, 3 color figures. Submitted to ApJ Letters
dc.identifierhttps://arxiv.org/abs/astro-ph/0512344
dc.identifierhttp://arxiv.org/abs/astro-ph/0512344
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/104218
dc.subjectAstrophysics
dc.titleHypervelocity intracluster stars ejected by supermassive black hole binaries
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