ZARM, University of Bremen
Am Fallturm
28359 Bremen
Germany

Dissertation

• Relativistic accretion onto compact objects (July 2018)

Publications

• V. Witzany, P. Jefremov: "New closed analytical solutions for geometrically thick fluid tori around black holes. Numerical evolution and the onset of the magneto-rotational instability" Astron. Astrophys. 614, A75 (2018)  arXiv.org/abs/1711.09241
• P. Jefremov, V. Perlick: "Circular motion in NUT spacetime" Class. Quantum Grav. 33, 245014 (2016)  arxiv.org/abs/1608.06218
• O. Yu. Tsupko, G. S. Bisnovatyi-Kogan, P. I. Jefremov, : "Parameters of innermost stable circular orbits of spinning test particles: Numerical and analytical calculations" Gravitation and Cosmology, 22, 138-147 (2016)  arxiv.org/abs/1605.04189
• P. I. Jefremov, O. Yu. Tsupko, G. S. Bisnovatyi-Kogan: "Innermost stable circular orbits of spinning test particles in Schwarzschild and Kerr space-times" Phys. Rev. D, 91, 124030 (2015)  arxiv.org/abs/1503.07060