2015/11/30 by Eloy Ayón-Beato, Eloy Ayón–Beato, Daniel Higuita-Borja +2
Physics and Astronomy · #Angular momentum #Ansatz #Black Holes and Theoretical Physics #Black hole (networking) #Classical mechanics #Context (archaeology) #Cosmology and Gravitation Theories #Mathematical physics #Noncommutative and Quantum Gravity Theories #Physics #RADIUS #Theoretical physics #gr-qc #hep-th
paper · pdf · doi:10.1103/physrevd.93.024049
published as Phys. Rev. D 93, 024049 (2016) · 8 pages
openalex publication_date 2016/01/27 · arxiv created 2017/07/17 · arxiv updated 2017/07/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this paper we explore the advantage of using the Kerr-Schild Ansatz in the search for analytic configurations to bigravity. It turns out that it plays a crucial role by providing means to straightforwardly calculate the square root matrix encoding the interaction terms between both gravities. In this spirit, we rederive the Babichev-Fabbri family of asymptotically flat rotating black holes with the aid of an emerging circularity theorem. Taking into account that the interaction terms contain by default two cosmological constants, we repeat our approach starting from the more natural seeds for the Kerr-Schild Ansatz in this context: the (A)dS spacetimes. As a result, we show that a couple of Kerr--(A)dS black holes constitute an exact solution to ghost-free bigravity. Similar to the asymptotically flat case, these black holes share the same angular momentum and (A)dS radius, but their masses are not constrained to be equal.