Jul 5 – 12, 2017
Venice, Italy
Europe/Zurich timezone
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The turnaround radius as a probe of dark energy and modified gravity

Jul 7, 2017, 10:30 AM
Room Martinelli (Palazzo del Casinò)

Room Martinelli

Palazzo del Casinò

Parallel Talk Cosmology, Dark Energy, Gravitational Waves Cosmology, dark energy, gravitational waves


Prof. Valerio Faraoni (Bishop's University)


In an accelerating universe a maximum radius exists above which a shell of test particles cannot collapse and disperses due to the cosmic expansion. Observations of this turnaround radius for large structures could constrain the
effective equation of state of dark energy. We use the Hawking quasilocal mass to make the concept of turnaround radius well defined in general relativity and
then we extend it to modified theories of gravity for which the gravitational slip is non-vanishing.

[Based on V. Faraoni, M. Lapierre-Leonard & A. Prain 2015,JCAP 10, 013; V. Faraoni 2016, Phys. Dark Universe 11, 11]

Primary author

Prof. Valerio Faraoni (Bishop's University)

Presentation materials