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Published 1996 | Version Published
Book Section - Chapter Open

A Search for Gravitational Milli–Lenses

Creators

  • 1. ROR icon University of Manchester
  • 2. ROR icon California Institute of Technology

Contributors

Abstract

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.

Additional Information

© 1996 IAU.

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Identifiers

Eprint ID
91650
Resolver ID
CaltechAUTHORS:20181210-135714017

Dates

Created
2018-12-10
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Updated
2021-11-16
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Series Name
IAU Symposium Proceedings Series
Series Volume or Issue Number
168