Active galaxy nuclei: current state of the problem
Abstract
This review presents the main points of current advances in the field of active galactic nuclei (AGN). A brief historical excursion about the search for the nature of AGN is given. The problem of close binary systems consisting of supermassive black holes located in the centers of galaxies is discussed in details. The main characteristics, as well as new methods for studying and ``weighing'' these new objects, are described. This paper is based on a presentation made in the astrophysical seminar, which dedicated to the memory of the outstanding astrophysicist N.G. Bochkarev (took place on May 19, 2023 at the Sternberg Astronomical Institute of Moscow State University).
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