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28 March 2024
 
  » arxiv » astro-ph/0101328

 Article overview


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
Affiliation1,2), 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,
AbstractUsing 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
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