2011/04/06 by Paolo Pani, Vitor Cardoso, Vítor Cardoso +1 · 4 citations
Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Black hole (networking) #Classical mechanics #Cosmology and Gravitation Theories #Galaxy #General relativity #Gravitation #Gravitational field #Gravitational wave #Gravitational-wave observatory #Physics #Pulsars and Gravitational Waves Research #Quantum mechanics #Scalar field #Spacetime #Supermassive black hole #Theoretical physics #astro-ph.HE #gr-qc #hep-th
paper · pdf · doi:10.1103/physrevd.83.104048
published as Phys.Rev.D83:104048,2011 · RevTex4, 18 pages, 7 figures, 1 table
arxiv created 2011/04/06 · openalex publication_date 2011/05/26 · arxiv updated 2015/03/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Dynamical Chern-Simons gravity is an interesting extension of general relativity, which finds its way in many different contexts, including string theory, cosmological settings, and loop quantum gravity. In this theory, the gravitational field is coupled to a scalar field by a parity-violating term, which gives rise to characteristic signatures. Here we investigate how Chern-Simons gravity would affect the quasicircular inspiralling of a small, stellar-mass object into a large nonrotating supermassive black hole, and the accompanying emission of gravitational and scalar waves. We find the relevant equations describing the perturbation induced by the small object, and we solve them through the use of Green's function techniques. Our results show that for a wide range of coupling parameters, the Chern-Simons coupling gives rise to an increase in total energy flux, which translates into a fewer number of gravitational-wave cycles over a certain bandwidth. For space-based gravitational-wave detectors such as LISA, this effect can be used to constrain the coupling parameter effectively.