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Astrophysics, Gravitation and Cosmology Seminar - "Gravitational radiation from a binary black hole coalescence in Einstein-scalar-Gauss-Bonnet gravity"

Event Type
Seminar/Symposium
Sponsor
Department of Physics
Location
464 Loomis
Date
Feb 19, 2020   12:00 pm  
Speaker
Felix Julie, Johns Hopkins University
Contact
Betsy Greifenkamp
E-Mail
greifenk@illinois.edu
Views
31
Originating Calendar
Physics - Astrophysics, Gravitation, and Cosmology Seminar

In this talk I will show how to derive analytical gravitational waveforms associated to the coalescence of a “hairy” black hole binary in Einstein-scalar-Gauss-Bonnet gravity (ESGB). I will present the post-Newtonian (PN) Lagrangian and gravitational wave fluxes radiated by such systems. The PN framework relies on reducing the black holes to point particles with scalar field-dependent masses. I will show that this procedure amounts to fixing the Wald entropy of each black hole during their slow, adiabatic inspiral. I will then extend the domain of validity of the PN approximation to the strong field regime near merger, by generalizing the effective-one-body (EOB) formalism to ESGB gravity.

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