Emission signatures from supermassive black hole binary systems

Data: 
19/08/2020 - 14:00 - 15:00
Local: 
Remoto, com transmissão pela Internet

Emission signatures from supermassive black hole binary systems

Juan Carlos Rodríguez-Ramírez

IAG/USP

Theoretical arguments as well as indirect observational evidence suggest the presence of super massive black hole (SMBH) binaries coalescing in the core of certain galaxies. However, current instruments lack the sensitivity to confirm these binary systems at sub parsec scales, or to directly detect their associated gravitational wave signals. In this talk, I will discuss indirect methods aimed to trace the presence of these putative binary systems. I will also discuss flaring features observed from the blazar OJ 287 which is perhaps the strongest candidate to host a coalescing SMBH binary. Finally, I will present a recently developed hadronic emission model based on a picture of BH-disc impacts. With this model we explain the multi-wavelength components (optical, X-rays and gamma-rays) of the simultaneous 2015 major flare observed from the blazar OJ 287.

 

Link da transmissão: https://www.youtube.com/c/AstronomiaIAGUSP/live