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Limits on the cosmological abundance of supermassive compact objects from a search for multiple imaging in compact radio sources | P.N. Wilkinson
; D.R. Henstock
; I.W.A. Browne
; A.G. Polatidis
; P. Augusto
; A.C.S. Readhead
; T.J. Pearson
; W. Xu
; G.B. Taylor
; R.C. Vermeulen
; | Date: |
18 Dec 2000 | Journal: | PRL vol 86 no 4 p 584-587 | Subject: | astro-ph | Affiliation: | 1,2), P. Augusto (1,3), A.C.S. Readhead , T.J. Pearson , W. Xu , G.B. Taylor (4,5), R.C. Vermeulen (4,6) ( University of Manchester, Jodrell Bank Observatory, Onsala Space Observatory, Universidade da Madeira., California Institute of Technology, | Abstract: | Using Very Long Baseline Interferometry we have searched a sample of 300 compact radio sources for examples of multiple imaging produced by gravitational lensing; no multiple images were found with separations in the angular range 1.5--50 milliarcsec. This null result allows us to place a limit on the cosmological abundance of intergalactic supermassive compact objects in the mass range $sim 10^{6}$ to $sim 10^{8}$M$_{odot}$; such objects cannot make up more than $sim 1%$ of the closure density (95% confidence). A uniformly distributed population of supermassive black holes forming soon after the Big Bang do not, therefore, contribute significantly to the dark matter content of the Universe. | Source: | arXiv, astro-ph/0101328 | Services: | Forum | Review | PDF | Favorites |
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