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SUMMARY:The universal shape of the X-ray variability power spectrum of AGN
  up to z ∼ 3
DTSTART;VALUE=DATE-TIME:20230626T151500Z
DTEND;VALUE=DATE-TIME:20230626T153000Z
DTSTAMP;VALUE=DATE-TIME:20260519T010547Z
UID:indico-contribution-867@cern.ch
DESCRIPTION:Speakers: Maurizio Paolillo (Università di Napoli Federico II
 )\nWe present a study of the ensemble X-ray variability of Active Galactic
  Nuclei (AGN) over a large range of timescales (20 ks ≤ T ≤ 14 yrs)\, 
 redshift (0 ≤ z ≲ 3)\, luminosities ($10^{40} \\leq L_X \\leq 10^{46}\
 \ \\mbox{erg s}^{−1}$) and black hole (BH) masses $10^6≤M_⊙≤10^9$)
 . Through the use of the "variance–frequency diagram"\, as a viable alte
 rnative to the power spectral density (PSD)\, we show that the data collec
 ted from archival observations and previous literature studies are consist
 ent with a universal PSD form which does not show evidence for systematic 
 evolution of shape or amplitude with redshift or luminosity. We find new e
 vidence that the PSD bend\nfrequency depends on BH mass and\, possibly\, o
 n accretion rate. We will discuss the implications for current and future 
 AGN population and cosmological studies\n\nhttps://indico.unina.it/event/6
 1/contributions/867/
LOCATION:Centro Congressi Federico II Aula Magna
URL:https://indico.unina.it/event/61/contributions/867/
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