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C. M. Turner (University of Oregon), C. R. Keeton (University of Chicago), C. S. Kochanek (Harvard-Smithsonian Center for Astrophysics)
Using four-image gravitational lenses in the CfA-Arizona Space Telescope Lens Survey, we probe the angular structure of lens galaxy mass distributions. The models show the lens potential is successfully constrained for four-image lenses. The largest contribution to shear perturbations is found outside of the lens' Einstein ring, which suggests a dramatic, outlying mass component. We find strong evidence that most lens galaxies have extended, flattened dark matter halos.
CMT acknowledges support from the NSF/REU program at the University of Chicago's Department of Physics. CRK acknowledges support from a Hubble Fellowship grant, awarded through STScI.
The author(s) of this abstract have provided an email address for comments about the abstract: cturner@deepcore.uoregon.edu
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Bulletin of the American Astronomical Society, 34, #4
© 2002. The American Astronomical Soceity.