Speaker
Valerio Faraoni
(Bishop's University)
Summary
In an accelerating universe there is a maximum radius above
which a shell of test particles cannot collapse and is dispersed by the cosmic expansion. This
radius could be used in conjunction with observations of large structures to constrain the
equation of state of the universe. We express the turnaround radius in general relativity in terms
of the Hawking quasilocal mass
and we extend the concept to modified theories of gravity for which the gravitational slip is non-vanishing.
| Based on (arXiv number) | arXiv:1508.01725; (arXiv:1508.00475 |
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Primary author
Valerio Faraoni
(Bishop's University)
