50 years of energy extraction from rotating black hole: Magnetic Penrose Process

Naresh Dadhich

(Inter-University Center for Astronomy and Astrophysics (IUCAA), M.A. Ansari Chair in Theoretical Physics at Centre for Theoretical Physics, Jamia Millia Islamia, Delhi)

لطفا به مکان جدید سمینار توجه فرمایید!

Abstract: It is 50 years since Penrose proposed in 1969 the purely geometric process of extracting rotational energy from a rotating black hole. It was indeed a very novel and remarkable process but it was soon realized that it cannot be efficient enough for astrophysical application in powering high energy objects like quasars and AGNs. The difficulty was in the requirement that relative velocity between the two fragments must be greater half the velocity of light, which was astrophyically untenable. This difficulty was beautifully overcome by the speaker and his coworkers in 1985 when they considered magnetic version of the process and had shown that efficiency of energy extraction could even exceed 100%. Now the fully relativistic magnetohydrodynamics simulations wonderfully bear out this prediction and MPP is being considered the most favored process for powering the central engine of high energy objects. The speaker will review the fifty years journey.

یکشنبه ۱۹ آبان ۱۳۹۸، ساعت ۱۵:۰۰

دانشکده فیزیک، طبقه چهارم – تالار پرتوی