مشخصات پژوهش

عنوان	Three theorems on near horizon extremal vanishing horizon geometries
نوع پژوهش	مقاله چاپ شده
کلیدواژه‌ها	Near horizon geometry, Extremal black holes, anti-de Sitter, strong energy condition
چکیده	EVH black holes are Extremal black holes with Vanishing Horizon area, where vanishing of horizon area is a result of having a vanishing one-cycle on the horizon. We prove three theorems regarding near horizon geometry of EVH black hole solutions to generic Einstein gravity theories in diverse dimensions. These generic gravity theories are Einstein–Maxwell-dilaton-Λ theories, and gauged or ungauged supergravity theories with U(1) Maxwell fields. Our three theorems are: (1) The near horizon geometry of any EVH black hole has a three dimensional maximally symmetric subspace. (2) If the energy momentum tensor of the theory satisfies strong energy condition either this 3d part is an AdS 3 , or the solution is a direct product of a locally 3d flat space and a d−3 dimensional part. (3) These results extend to the near horizon geometry of near-EVH black holes, for which the AdS 3 part is replaced with BTZ geometry.
پژوهشگران	حسین یاورتنو (نفر چهارم)، محمد حسن وحیدی نیا (نفر سوم)، محمد مهدی شیخ جباری (نفر دوم)، سعیده صادقیان (نفر اول)