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SUMMARY:Review: Changing-look AGN
DTSTART;VALUE=DATE-TIME:20230629T073000Z
DTEND;VALUE=DATE-TIME:20230629T080000Z
DTSTAMP;VALUE=DATE-TIME:20260519T012043Z
UID:indico-contribution-908@cern.ch
DESCRIPTION:Speakers: Claudio Ricci (Universidad Diego Portales)\nAGN are 
 known to show flux variability over all observable timescales and across t
 he entire electromagnetic spectrum. Over the past decade\, a growing numbe
 r of sources have been observed to show dramatic flux and spectral changes
 \, both in the X-rays and in the optical/UV. Such events\, commonly descri
 bed as “changing-look AGN”\, can be divided into two well-defined clas
 ses. Changing-obscuration objects show strong variability of the line-of-s
 ight column density\, mostly associated with clouds or outflows eclipsing 
 the central engine of the AGN. Changing-state AGN are instead objects in w
 hich the optical/UV continuum emission and broad emission lines appear or 
 disappear\, and are typically triggered by strong changes in the accretion
  rate of the supermassive black hole. In my talk I will review our current
  understanding of these objects\, and then focus on a few recent X-ray mon
 itoring campaigns of Changing-state AGN.\n\nhttps://indico.unina.it/event/
 61/contributions/908/
LOCATION:Centro Congressi Federico II Aula Magna
URL:https://indico.unina.it/event/61/contributions/908/
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