1. RRI Digital Repository
  2. 04. Astronomy and Astrophysics
  3. Research Papers (A&A)
Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6345
Full metadata record
DC FieldValueLanguage
dc.contributor.authorRoberts, David H-
dc.contributor.authorSaripalli, Lakshmi-
dc.contributor.authorSubrahmanyan, Ravi-
dc.date.accessioned2015-11-17T07:15:41Z-
dc.date.available2015-11-17T07:15:41Z-
dc.date.issued2015-09-
dc.identifier.citationAstrophysical Journal Letters, 2015, Vol. 810, L6en_US
dc.identifier.issn2041-8213 (Online)-
dc.identifier.issn2041-8205-
dc.identifier.urihttp://hdl.handle.net/2289/6345-
dc.descriptionRestricted Access. An open-acce s version is available at arXiv.org (one of the alternative locations)en_US
dc.description.abstractCoalescence of supermassive black holes (SMBHs) in galaxy mergers is potentially the dominant contributor to the low frequency gravitational wave background (GWB). It was proposed by Merritt & Ekers that X-shaped radio galaxies are signposts of such coalescences and that their abundance might be used to predict the magnitude of the GWB. In Roberts et al. we presented radio images of all 52 X-shaped radio source candidates out of the sample of 100 selected by Cheung for which archival VLA data were available. These images indicate that at most 21% of the candidates might be genuine X-shaped radio sources that were formed by a restarting of beams in a new direction following a major merger. This suggests that fewer than 1.3% of extended radio sources appear to be candidates for genuine axis reorientations ("spin flips"), much smaller than the 7% suggested by Leahy & Parma. Thus, the associated GWB may be substantially smaller than previous estimates. These results can be used to normalize detailed calculations of the SMBH coalescence rate and the GWB.en_US
dc.language.isoenen_US
dc.publisher2015 American Astronomical Societyen_US
dc.relation.urihttp://adsabs.harvard.edu/abs/2015ApJ...810L...6Ren_US
dc.relation.urihttp://arxiv.org/abs/1503.02021en_US
dc.relation.urihttp://dx.doi.org/10.1088/2041-8205/810/1/L6en_US
dc.rights2015 American Astronomical Societyen_US
dc.subjectRadio Continuumen_US
dc.titleThe abundance of x-shaped radio sources: implications for the gravitational wave backgrounden_US
dc.typeArticleen_US
Appears in Collections:Research Papers (A&A)

Files in This Item:
File Description SizeFormat 
2015_APJL_V810_pL6.pdf
  Restricted Access		Restricted Access407.79 kBAdobe PDFView/Open Request a copy
Show simple item record


Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.