报告摘要：If there are primordial black holes in the dark matter halo, they must collide with the Galactic neutron stars (NS) and produce light black holes (LBH), with masses below 1.4 M_Sun. This has observational consequences that may be checked by microlensing, by LIGO-Virgo-Kagra iterferometers detecting gravitational waves from collisions of LBH with NS and BH, by detecting LBH in X-ray binaries and from pulsars statistics.

主讲人简介：Prof. Marek Abramowicz earned his Ph.D. in theoretical physics from Warsaw University. After that he worked for several years at Stanford University and University of Texas at Austin. Later, for more than a decade, he collaborated closely with Dennis Sciama, first at Oxford University and then at the International School for Advanced Studies in Trieste. For twenty years he was a member of the Academic Board at the Salam's International Centre of Theoretical Physics in Trieste. In 1990-1994 he was professor of astrophysics at Nordita, the Nordic Institute for Theoretical Physics in Copenhagen. He was the Chair professor of Astrophysics at Göteborg University and Chalmers University of Technology in Sweden for many year. Now he is a professor at the Nicolaus Copernicus Astronomical Center of the Polish Academy of Science, and a member of the European Academy of Sciences and Arts. Prof. Abramowicz’s interests include accretion discs theory, active galactic nuclei, neutron stars, black holes, nature of inertial forces and quantum effects in strong gravity. His theory of “slim disk accretion” has been considered as one of the foundations of understanding the formation and growth of black holes.