Merging of a massive binary due to ejection of bound stars - II

Zier, C.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3809

Full metadata record

DC Field	Value	Language
dc.contributor.author	Zier, C.	-
dc.date.accessioned	2009-07-28T11:35:18Z	-
dc.date.available	2009-07-28T11:35:18Z	-
dc.date.issued	2007-06-15	-
dc.identifier.citation	Monthly Notices of the Royal Astronomical Society, 2007, Vol. 378, p1309	en
dc.identifier.issn	E-ISSN: 1365-2966	-
dc.identifier.issn	P-ISSN: 0035-8711	-
dc.identifier.uri	http://hdl.handle.net/2289/3809	-
dc.description	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)	en
dc.description.abstract	In this paper, the second in a series of two, we justify two important assumptions on which the result is based that in the course of a galaxy merger, the slingshot ejection of bound stars is sufficiently efficient to allow a supermassive black hole binary (BHB) to merge. A steep cusp with a power-law index of 2.5-3 is required which is as massive as the binary and surrounds the BHs when the binary becomes hard. This cusp is probably formed when both clusters, surrounding each BH, merge and combine with the matter funnelled into the centre. We find this profile to be in agreement with observed post-merger distributions after the cusp has been destroyed. The time dependency we derive for the merger predicts that stalled BHs, if they exist at all, will preferentially be found at less than ~0.2pc distance. To test this prediction we compute the current semimajor axis of 12 candidates of ongoing mergers. We find all binaries unambiguously to be already in the last phase when they decay due to the emission of gravitational waves. Therefore, in striking contradiction with predictions of a depleted loss-cone, the absence of even a single source in the slingshot phase strongly supports our previous and current results: binaries merge due to the slingshot ejection of stars which have been funnelled into the central regions in the course of a galaxy collision.	en
dc.language.iso	en	en
dc.publisher	Wiley Interscience for the RAS	en
dc.relation.uri	http://adsabs.harvard.edu/abs/2007MNRAS.378.1309Z	en
dc.relation.uri	http://arxiv.org/abs/astro-ph/0610457	en
dc.relation.uri	http://dx.doi.org/10.1111/j.1365-2966.2007.11859.x	en
dc.rights	2007 Author & RAS	en
dc.subject	black hole physics	en
dc.subject	galaxies: evolution	en
dc.subject	galaxies: interaction	en
dc.subject	galaxies: kinematics and dynamics	en
dc.title	Merging of a massive binary due to ejection of bound stars - II	en
dc.type	Article	en
Appears in Collections:	Research Papers (A&A)

Files in This Item:

File	Description	Size	Format
2007 MNRAS V378 p1309.pdf Restricted Access	Restricted Access	712.27 kB	Adobe PDF	View/Open Request a copy

Show simple item record