The Colloquium takes place every Wednesday at 11:15 AM - Warsaw Copernicus Astronomical Centre online by means of Zoom platform. The Colloquium is given in English and chaired by dr Stanisław Bajtlik (bajtlik@camk.edu.pl). People from outside of the Copernicus Center are very welcome to participate. For technical detailes please contact Dr. Stanislaw Bajtlik.
Omer Bromberg (Tel Aviv University)
Black-holes are like the genie of the lamp, as they can store vast amounts of energy within an extremely compact region. Under the right conditions, this energy can be harnessed to power some of the most luminous and energetic phenomena in the universe, like quasars and gamma-ray bursts. Current theoretical understanding suggests that the energy release is facilitated by the black-hole’s rotation and its interaction with magnetic fields supplied by accreted matter. Yet, how the black-hole magnetosphere responds to the energy extraction and by what processes this energy is ultimately converted into the observable emission is still debated. In this talk, I will discuss the necessary conditions near the event horizon that can sustain a stable energy extraction. I will trace the path of the outflowing energy that gives rise to relativistic jets and examine the mechanisms responsible for converting the energy into the observed light. These processes may offer insights into recent observations of core emission from black hole-powered systems.
Journal Club takes place on Mondays at 11:15 AM in the Seminar Room. The presentation is given in English and is chaired by Journal Club Coordinators. Anyone interested in giving a Journal Club talk is encouraged to contact the email: journalclub(@camk.edu.pl).
John Martínez Fernández (NCAC, Warsaw)
Based on https://arxiv.org/abs/2502.16360
