SÉMINAIRE DU GRECO
"Probing Ultralight Bosons with Binary Black Holes" |
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Horng Sheng Chia |
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Ultralight bosons exist in various proposed extensions to the Standard Model, which can form condensates around rapidly rotating black holes through a process called superradiance. These boson clouds have many interesting observational consequences, such as the continuous emission of monochromatic gravitational waves. In this talk, I will describe the dynamics of the system when it is part of a binary black hole. I will show that the presence of a binary companion greatly enriches the evolution of the boson clouds, most remarkably through the existence of resonant transitions between growing and decaying modes of the clouds. Finally, I will sketch some phenomenological consequences, both for the gravitational waves emitted by the clouds and the finite-size effects imprinted in the waveforms of the binary signal. |
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lundi 24 septembre 2018 - 11:00 Salle des séminaires Évry Schatzman, Institut d'Astrophysique de Paris |
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