Halo Substructure and Compound Lensing

Details Halo Substructure and Compound Lensing Halo Substructure and Compound Lensing

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...19916114m&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #161.14; Bulletin of the American Astronomical Society, Vol. 34, p.574

Astronomy and Astrophysics

Astronomy

Scientific paper

It will be shown how observations of multiply-imaged quasars at high redshift have been used to probe dark matter clumps within the lensing halos. A large abundance of such satellites is predicted by the cold dark matter (CDM) model and not by warm dark matter or interacting dark matter models. Numerical lensing simulations show that the quasar magnification ratios are strongly affected by substructure. We find that simple lens models containing no substructure are not compatible with observations.

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