Speaker
Santiago Bernal
(REMOTE)
Description
We study the evolution of the accretion disk spectrum with flux, using data from the time-domain Sloan Digital Sky Survey (SDSS-V) project for 220 quasars at z<0.8. We subtract the host contribution consistently between epochs and model the disk, BLR continua and emission lines simultaneously using the Penalized Pixel Fitting (pPXF) software. We find, even at long wavelengths, that the accretion disk itself becomes steeper when the flux increases so the Bluer-When-Brighter (BWB) is not just a matter of relative contributions of host and the Active Galactic Nuclei components.
