Fredagskollokvium: The endless quest for obscured AGN across cosmic time

Cristian Vignali, Physics and Astronomy Department, Bologna University (Italy)

portrettbildet av en smilende man på stranda med briller
Cristian Vignali is associate professor at Department of Physics and Astronomy "Augusto Righi", Universita' di Bologna.

In this talk I will present the long-standing quest for obscured Active Galactic Nuclei (AGN) using multi-wavelength methods and their importance in the reconstruction of the black hole accretion rate density across cosmic time.
In particular, I will highlight some recent results from X-ray surveys and pointed observations, coupled with those coming from the complementary selection of heavily obscured AGN in the mid-IR and optical bands. This multi-band observing strategy has pushed the search for obscured AGN and provided clues to the AGN-galaxy co-evolution scenario up to very high redshift (z~5).


illustrasjonsbildet av støv og gas rundt et svart hull

Artistic view of the innermost regions around a supermassive black hole. Credit: NASA/CXC/M. Weiss.


Emneord: institute seminar, fredagskollokvium, AGN, Observasjoner, Galaxies
Publisert 7. juni 2022 14:15 - Sist endret 7. juni 2022 14:20