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On the Probability for Sub-Halo Detection through Quasar Image Splitting

Published online by Cambridge University Press:  01 June 2007

T. Riehm ,
E. Zackrisson ,
K. Wiik  and
O. Möller
T. Riehm
Affiliation:
Stockholm Observatory, AlbaNova University Center, 106 91 Stockholm, Sweden
E. Zackrisson
Affiliation:
Stockholm Observatory, AlbaNova University Center, 106 91 Stockholm, Sweden Tuorla Observatory, University of Turku, Väisäläntie 20, FI-21500 Piikkiö, Finland Department of Astronomy and Space Physics, Box 515, 751 20 Uppsala, Sweden
K. Wiik
Affiliation:
Tuorla Observatory, University of Turku, Väisäläntie 20, FI-21500 Piikkiö, Finland
O. Möller
Affiliation:
Max Planck Institut für Astrophysik, D-85741 Garching, Germany
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Abstract

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Dark galaxies may in principle be detectable through strong-lensing image splitting of quasars on small angular scales (milliarcseconds or below). Here, we estimate the overall probabilities for such detections under the assumption that the quasars can be treated as point sources. Due to the very low probabilities derived, we conclude that it is currently not feasable to use this strategy to put the CDM predictions for the dark galaxy population to the test.

Keywords

dark matter – cosmology: observations – galaxies: halos – quasars: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S244: Dark Galaxies and Lost Baryons , June 2007 , pp. 376 - 377
Copyright
Copyright © International Astronomical Union 2008

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