Limits on the cosmological abundance of supermassive compact objects from a search for multiple imaging in compact radio sources

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dc.creatorWilkinson, P. N.
dc.creatorHenstock, D. R.
dc.creatorBrowne, I. W. A.
dc.creatorPolatidis, A. G.
dc.creatorAugusto, P.
dc.creatorReadhead, A. C. S.
dc.creatorPearson, T. J.
dc.creatorXu, W.
dc.creatorTaylor, G. B.
dc.creatorVermeulen, R. C.
dc.date2001-01-18
dc.date.accessioned2026-07-07T12:00:45Z
dc.date.available2026-07-07T12:00:45Z
dc.descriptionUsing 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.
dc.description2 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0101328
dc.identifierhttp://arxiv.org/abs/astro-ph/0101328
dc.identifierPhys.Rev.Lett.86:584-587,2001
dc.identifierdoi:10.1103/PhysRevLett.86.584
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206888
dc.subjectAstrophysics
dc.titleLimits on the cosmological abundance of supermassive compact objects from a search for multiple imaging in compact radio sources
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