Gravitational Lensing by Galactic Substructure and the Nature of Dark Matter

Details Gravitational Lensing by Galactic Substructure and the Nature of Dark Matter Gravitational Lensing by Galactic Substructure and the Nature of Dark Matter

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.8003m&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #80.03; Bulletin of the American Astronomical Society, Vol. 34, p.1236

Astronomy and Astrophysics

Astronomy

Scientific paper

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 invisible satellites is predicted by the cold dark matter (CDM) model while in warm dark matter or interacting dark matter models they are rare or absent. Numerical lensing simulations show that the quasar magnification ratios and the relative shapes of quasar radio jets are strongly affected by substructure. We find that smooth halo models containing no substructure are not compatible with a variety of lensing observations.

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