Today:
tba
Vipilan Sivanesan
09:15
Old and recent puzzles in Flavour Physics
Prof. Dr. Gino Isidori
16:30
Upcoming:
Autoencoder networks
Jennifer Thompson
Tue, 22 Jan 2019, 15:00
Phase coherence measurements via polarization echoes
Patricia Kuntz
Tue, 22 Jan 2019, 16:00
Dragonflies, dark matter, and the hunt for ghostly galaxies
Pieter van Dokkum
Tue, 22 Jan 2019, 16:15
Belle II
Dr. Carsten Niebuhr
Tue, 22 Jan 2019, 17:00

The effect of the cosmological constant on the bending of light

Oliver Piattella , ITP - UFES
Whether or not the cosmological constant Lambda affects the bending of light is a matter of debate. In principle, being Lambda a homogeneous component, one does not expect from it any contribution whatsoever. On the other hand, Ishak and Rindler have suggested in 2007 (arXiv:0709.2948) that a more appropriate definition of the bending angle in a Schwarzschild-de Sitter geometry makes Lambda appear in the formula for the bending angle. Since then many investigations appeared on the subject, some substantiating the result of Ishak and Rindler, others contradicting it. I will review part of this literature and present my own contribution, based on calculations on the McVittie metric (arXiv:1508.04763), which also allows to treat a more general cosmology, in which the Hubble factor is a function of time (arXiv:1609.00270).
Kosmologie und Elementarteilchenphysik
11 Dec 2018, 11:00
Institut für Theoretische Physik, Phil16;SR

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