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A Search for Gravitational Milli–Lenses

Wilkinson, P. N. and Henstock, D. R. and Browne, I. W. A. and Readhead, A. C. S. and Taylor, G. B. and Vermeulen, R. C. and Pearson, T. J. and Xu, W. (1996) A Search for Gravitational Milli–Lenses. In: Examining the Big Bang and the Diffuse Background Radiations. IAU Symposium Proceedings Series. No.168. Kluwer , Dordrecht, pp. 95-98. ISBN 9780792338147.

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We have searched for gravitational milli–lens systems by examining VLBI maps of ~ 300 flat–spectrum radio sources. So far we have followed up 7 candidates, with separations in the range 2–20 mas. None have been confirmed as lenses but several of them can not yet be definitively ruled out. If there are no milli-lenses in this sample then uniformly–distributed black holes of 10^6 to 10^8 M_⊙ cannot contribute more than ~ 1% of the closure density.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Readhead, A. C. S.0000-0001-9152-961X
Taylor, G. B.0000-0001-6495-7731
Pearson, T. J.0000-0001-5213-6231
Additional Information:© 1996 IAU.
Series Name:IAU Symposium Proceedings Series
Issue or Number:168
Record Number:CaltechAUTHORS:20181210-135714017
Persistent URL:
Official Citation:Wilkinson, P., Henstock, D., Browne, I., Readhead, A., Taylor, G., Vermeulen, R., . . . Xu, W. (1996). A Search for Gravitational Milli–Lenses. Symposium - International Astronomical Union, 168, 95-98. doi:10.1017/S0074180900109970
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91650
Deposited By: Tony Diaz
Deposited On:10 Dec 2018 22:10
Last Modified:16 Nov 2021 03:43

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