N-body Degravitation

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• Mark Wyman (Perimeter Institute)
• Friday 31 October 2008, 13:00-14:00
• Pavilion B Potter Room (B1.19).

If you have a question about this talk, please contact Dr H K Kunduri.

A possible resolution to the cosmological constant problem may come from the graviton having a small mass. In this picture, the graviton carries extra polarizarions. Its helicity-0 or scalar mode is suppressed in regions of high density but becomes important on cosmological distance scales. We are solving the equations approximating the scalar component numerically as a part of an N-body simulation. This allows us to quantify the impact of massive/resonance gravity on the formation of large scale structure for the first time. Some recent observations, most notably of bulk peculiar velocity flows, provide hints that the unique phenomenology of this framework provides a better approximation to the data than standard Lambda-CDM.

This talk is part of the DAMTP Friday GR Seminar series.

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