2007/12/26 by Gregory Gabadadze, Alberto Iglesias
Physics and Astronomy · #Black Holes and Theoretical Physics #Consistency (knowledge bases) #Cosmology and Gravitation Theories #Curvature #Gravitation #Halo #Massive gravity #Noncommutative and Quantum Gravity Theories #Observable #Observer (physics) #hep-th
paper · pdf · doi:10.1088/0264-9381/25/15/154008
published as Class.Quant.Grav.25:154008,2008 · 16 pages, 4 figures, A contribution to the Proceedings of the International Workshop on Cosmology and Gravitation, Peyresq 12, June 16-22, 2007, Peyresq, France
arxiv created 2007/12/26 · openalex publication_date 2008/07/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Models of modified gravity introduce extra degrees of freedom, which for a consistency with the data, should be suppressed at observable scales. In the models that share properties of massive gravity such a suppression is due to nonlinear interactions: an isolated massive astrophysical object creates a halo of a nonzero curvature around it, shielding its vicinity from the influence of the extra degrees of freedom. We emphasize that the very same halo leads to a screening of the gravitational mass of the object, as seen by an observer beyond the halo. We discuss the case when the screening could be very significant and may rule out, or render the models observationally interesting.