Seminar〝Pulsars could be strangeon stars〞

Star-UBB Seminar Series:- Pulsars could be strangeon stars

Human beings are curious about the material world since civilization, to link macro-phenomena to micro-statistics. Beyond question, the Fermi-Dirac statistics of electrons is the key, which was soon applied successfully to understand the nature of matter, and it is not surprising that the subject of condensed matter physics dominates in the physics department at any university. Such so familiar stuff is condensed by the electromagnetic force. Nevertheless, is there a kind of matter by the elementary strong force? Certainly, atomic nuclei are “drops” of strong matter, with building units of nucleons. What about the basic units of a “gigantic nucleus” with baryon number, A, larger than a thousand? The answer of the speaker is “strangeon”, and strong matter with large A, from maybe 10^5 to 10^57, could then be strangeon matter. He would like to explain the physics and astrophysics of strangeon matter in this talk, focusing on strangeon stars governed by gravity in this multi-messenger era, especially of gravitational waves.

時間:2023.03.23(四) 17:00~18:00
頻道:Zoom ID:853-7454-4159 ←
講者:Renxin Xu 徐仁新 (中国 北京大学物理学院)


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.


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