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Participant |
Faraoni, Valerio | |||||||
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Institution |
Bishop's University - 2600 College Street - Sherbrooke - Quebec - Canada | |||||||
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Session |
AT1 |
Accepted |
Yes |
Order |
2 |
Time |
15:15 | 20' |
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Talk |
Oral abstract |
Title |
Symmetry of Brans-Dicke Gravity As a Novel Solution-Generating Technique | |||||
| Coauthors | Faraoni, Valerio; Ciftci, Dilek Kazici: Belknap-Keet, Shawn | |||||||
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Abstract |
A little known symmetry group of Brans-Dicke gravity in the presence of conformally invariant matter (including electrovacuo) is used as a solution-generating technique, starting from a known solution as a seed. This novel technique is applied to generate, as examples, new spatially homogeneous and isotropic cosmologies, a 3-parameter family of spherical time-dependent spacetimes conformal to a Campanelli-Lousto geometry, and a family of cylindrically symmetric geometries. |
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Pdf file |
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Session |
ES1 |
Accepted |
Yes |
Order |
12 |
Time |
18:30 | 15' |
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Talk |
Oral abstract |
Title |
Simultaneous baldness and cosmic baldness and the Kottler spacetime | |||||
| Coauthors | Faraoni, Valerio; Cardini, Adriana; Chung, Wen-Jan | |||||||
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Abstract |
The Kottler/Schwarzschild-de Sitter geometry is the unique spherical solution of the vacuum Einstein equations with positive cosmological constant. Putative alternatives in the literature are shown to either solve different equations or to be the KSdS solution in disguise. No-hair and cosmic no-hair come together in a new simultaneous theorem for KSdS in the presence of an imperfect fluid. [Based on V. Faraoni, A.M. Cardini & W.-J. Chung 2018, Phys. Rev. D 97, 024046/1-9 (arXiv:1711.01880)] |
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Pdf file |
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