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UID:20260517T171738-04-9788DZeuaM@https://astronomia.uc.cl/2jucext1/institu
 toastrofisica/
DTSTAMP:20260517T211738Z
DESCRIPTION:Variability is ubiquitous in active galactic nuclei (AGN) and c
 an be observed or inferred at all timescales\, from hours to billions of y
 ears. In this talk I will first illustrate how spatially resolved optical 
 spectroscopy\, combined with high quality X-ray data\, can be used to prob
 e AGN variability on &gt\; 10^4 yr timescales. I will then present a compi
 lation of variability measurements\, covering many orders of magnitude bot
 h in time lags and variability amplitude\, which provides an overview of t
 he variabiltiy phenomena. This compilation includes ensemble studies\, whi
 ch characterise the mean variability among the AGN population\, as well as
  measurements for single objects such as the changing look AGN\, the Voorw
 erpjes galaxies\, and our own Sagittarius A*. Finally\, I will present a f
 ramework which allows us to test if and how variability in different AGN a
 nd at different timescales can be linked and explained based on the distri
 bution of the Eddington ratio (ER) among the galaxy population. At the end
  of the talk I will also discuss possible applications of our model\, e.g.
  for understanding extreme variable AGN or planning future time domain sur
 veys such as LSST. https://astronomia.uc.cl/2jucext1/institutoastrofisica/
 en/instituto-2/seminars/event/351-a-study-of-active-galactic-nuclei-variab
 ility-on-multiple-timescales-lia-sartori-eth-zurich
DTSTART:20190508T171500Z
DTEND:20190508T174500Z
LOCATION:Seminar Room (Instituto de Astrofísica\, Pontificia Universidad Ca
 tólica\, Vicuña Mackenna 4860\, Santiago\, Chile)
SUMMARY:A study of active galactic nuclei variability on multiple timescale
 s (Lia Sartori\; ETH Zurich)
URL:https://astronomia.uc.cl/2jucext1/institutoastrofisica/en/instituto-2/s
 eminars/event/351-a-study-of-active-galactic-nuclei-variability-on-multipl
 e-timescales-lia-sartori-eth-zurich
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