Star-UBB Seminar Series:- Primordial black holes, cosmological dark matter, and galactic antimatter
It is argued that the dense population of the early universe with well developed galaxies and supermassive black holes (quasars), observed by HST and JWST, nicely fits the conjecture that the galaxies and quasars are seeded by Primordial Black Holes(PBHs), proposed in the speaker and his team’s work more than 30 years ago. This idea of galaxy seeding by massive black holes is rediscovered in recent publications by several groups. It is shown that the predicted log-normal mass spectrum of PBHs very well agrees with astronomical observations. Their other prediction of noticeable amount of antimatter in the Galaxy (positrons, antinuclei, antistars) is also confirmed by the data. It is argued that the cosmological dark matter may totally consist of PBHs.
頻道：Zoom ID:853-7454-4159 ←
講者：Prof. Alexander D. Dolgov Профессор Александр Дмитриевич Долгов (Dipartimento di Fisica, Universita degli Studi di Ferrara, Ferrara, Italia; Новосибирский государственный университет, Россия)
*Novosibirsk State University, Russia
Scientific and Technological Advanced Research- Babeș-Bolyai University(Star-UBB) Seminar Series in Gravitation, Cosmology and Astrophysics
Presently a period of rapid and intense change are being witnessed in our understanding of the gravitational force, at a rate that is quickly increasing since the important observational discoveries of the late 1990s. With the advent of new observational techniques, the emergence of important cosmological and astrophysical paradigms can be seen that lead to a deep change in our understanding of the Universe. Astronomical observations strongly suggest that at large scales the force of gravity may not behave according to standard general relativity, and that a generalization of the gravitational action, either at the geometric level, or at the matter level, may be required for a full understanding of the gravitational interaction.
The goal of the present seminar is to bring Theoretical Gravitational Physics closer to the observations and experiments, and to discuss current topics in general relativity, high-energy physics, astrophysics and cosmology.