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arxiv: 0810.0535 · v2 · submitted 2008-10-02 · 🌌 astro-ph · gr-qc

Modification to the Luminosity Distance Redshift Relation in Modified Gravity Theories

\'Eanna \'E. Flanagan , Eran Rosenthal , Ira M. Wasserman This is my paper
classification 🌌 astro-ph gr-qc
keywords distancegravityluminosityredshiftscalarfunctionmeasurementsmodified
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We derive an expression for the luminosity distance as a function of redshift for a flat Robertson-Walker spacetime perturbed by arbitrary scalar perturbations possibly produced by a modified gravity theory with two different scalar perturbation potentials. Measurements of the luminosity distance as function of redshift provide a constraint on a combination of the scalar potentials and so they can complement weak lensing and other measurements in trying to distinguish among the various alternative theories of gravity.

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