26-30 July 2021
Zoom
Europe/Berlin timezone

Constraining Lorentz-violating gravity with gravitational wave observations

28 Jul 2021, 09:50
20m
Zoom

Zoom

Parallel session talk Astroparticle and Gravitational Waves T01: Astroparticle and Gravitational Waves

Speaker

Mario Herrero Valea (SISSA)

Description

Models of Lorentz-violating gravity can provide a solution to the puzzle of quantum gravity. By abandoning boost invariance, we can formulate theories which are renormalizable and even asymptotically free in certain cases. At low energies, certain amount of Lorentz violation persists and can percolate onto physical observables, such as the emission rate of gravitational waves from a bounded system.

I will discuss how to constraint the parameter space of Einstein-Aether gravity and Hořava gravity with binary pulsar observations. This singles out a region of the parameter space which points towards a minimal model where only a single parameter remains non-vanishing. I will discuss how the theory then becomes indistinguishable from GR at many levels. Cosmological observables remain as the only possible source of deviations and the only hope to further constraining the theory.

Collaboration / Activity .
Email mherrero@sissa.it
First author Mario Herrero Valea

Primary author

Presentation Materials