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.
Arpita Misra (Jagiellonian University, Cracow)
Supermassive black hole (SMBH) spin plays a central role in shaping relativistic jets, yet direct measurements of spin and its evolution remain challenging. Radio jets provide an indirect yet powerful probe of SMBH spin dynamics through their morphology, orientation, and temporal behavior. The radio galaxies exhibiting X-shaped or S-shaped jets are key candidates to study the spin evolution as they highlight a dynamic interplay between the jets, the central active region, and the intergalactic medium. In this talk, I will present observational evidence linking the jet properties of winged radio galaxies to the evolving spin of SMBHs, primarily focusing on S-shaped radio galaxies. Using multiwavelength and multi-frequency radio data, I will discuss how features such as jet reorientation, spectral aging, and large-scale morphology in post-merger and merging systems offer insights into changes in the spin axis. These results highlight the role of radio jets as tracers of SMBH spin evolution and demonstrate how detailed radio studies can constrain the physical processes governing black hole growth and feedback across cosmic time.
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).
Andrzej Zdziarski (NCAC, Warsaw)
based on https://arxiv.org/abs/2512.16638
