Testing General Relativity on Cosmological Scales with Weak Gravitational Lensing

Details Testing General Relativity on Cosmological Scales with Weak Gravitational Lensing Testing General Relativity on Cosmological Scales with Weak Gravitational Lensing

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543712v&link_type=abstract

American Astronomical Society, AAS Meeting #215, #437.12; Bulletin of the American Astronomical Society, Vol. 42, p.392

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Weak gravitational lensing is a powerful probe of modifications of General Relativity on cosmological scales, since such modifications can affect both how matter produces gravitational potential wells and how photons move within these wells. I will discuss alternative theories of gravitation and how we may constrain such theories using weak lensing observables, including those that could be obtained with the balloon-borne High Altitude Lensing Observatory (HALO). I will also discuss the "parametrized-post-Friedmannian" approach for obtaining model-independent constraints, in which new parameters are introduced to characterize the departure from General Relativity on large scales.

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