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The Detectability of Dark Galaxies Through Image-Splitting Effects

Published online by Cambridge University Press:  01 June 2007

E. Zackrisson ,
T. Riehm ,
H. Lietzen ,
O. Möller ,
K. Wiik  and
P. Nurmi
E. Zackrisson
Affiliation:
Tuorla Observatory, University of Turku, Väisäläntie 20, FI-21500 Piikkiö, Finland Stockholm Observatory, AlbaNova University Center, 106 91 Stockholm, Sweden Department of Astronomy and Space Physics, Box 515, 751 20 Uppsala, Sweden
T. Riehm
Affiliation:
Stockholm Observatory, AlbaNova University Center, 106 91 Stockholm, Sweden
H. Lietzen
Affiliation:
Tuorla Observatory, University of Turku, Väisäläntie 20, FI-21500 Piikkiö, Finland
O. Möller
Affiliation:
Max-Planck-Institut för Astrophysik, Karl-Schwarzschild-Strasse 1, D-85741 Garching, Germany
K. Wiik
Affiliation:
Tuorla Observatory, University of Turku, Väisäläntie 20, FI-21500 Piikkiö, Finland
P. Nurmi
Affiliation:
Tuorla Observatory, University of Turku, Väisäläntie 20, FI-21500 Piikkiö, Finland
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Abstract

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In principle, dark galaxies in the dwarf-galaxy mass range may be detectable through additional, small-scale image splitting of quasars that are already known to be multiply-imaged on arcsecond scales. Here, we derive the image separations expected for dark galaxies with density profiles favoured by recent N-body simulations. The results are compared to the angular resolution of existing and planned telescopes at X-ray, optical, near-infrared and radio wavelengths.

Keywords

Dark matter – galaxies: halos – galaxies: dwarf – gravitational lensing – quasars: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S244: Dark Galaxies and Lost Baryons , June 2007 , pp. 397 - 398
Copyright
Copyright © International Astronomical Union 2008

References

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