AT1 - Extended Theories of Gravity and Quantum Cosmology |
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Speaker |
Mendoza, Sergio |
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| Talk Title |
Metric extension of gravity based on the Tully-Fisher law |
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Abstract |
In this talk I will show that the empirical Tully-Fisher law can be seen as a substitute of Kepler's third law of motion and with it, I will show that gravity requires to be modified at scales of mass and length that differ from the ones associated to the solar system. I will also show that lensing observations of individual, groups and clusters of galaxies plus the Tully-Fisher law impose that the PPN parameter \gamma=1. I will discuss how to build a metric theory of gravity which can deal with these two fundamental ideas and briefly describe how this approach can explain the accelerated expansion of the universe and the dynamics of clusters of galaxies. |
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Talk view |
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