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SUMMARY:Revisiting the dust torus size - luminosity relationship in AGN ba
 sed on the mid-infrared reverberation mapping data
DTSTART;VALUE=DATE-TIME:20230626T130000Z
DTEND;VALUE=DATE-TIME:20230626T131500Z
DTSTAMP;VALUE=DATE-TIME:20260306T085015Z
UID:indico-contribution-878@cern.ch
DESCRIPTION:Speakers: Amit Kumar Mandal (Seoul National University\, Seoul
 )\nWe measured the dust torus  size of 86 quasars with bolometric AGN lu
 minosity in the range 10^43.4 to 10^46.4 erg/s  by determining the lag b
 etween the optical continuum emission obtained from ground-based optical s
 urveys\, i.e.\, CRTS\, ASAS-SN\, PTF and ZTF\, and the mid-infrared contin
 uum observed with the W1 and W2 bands from the Wide-field Infrared Survey 
 Explorer (WISE) survey. By combining the new measurements with our re-anal
 yzed measurements of the sample in the literature\, we constrain the torus
  size - AGN luminosity relation over a large dynamic range of luminosities
  (i.e.\, 10^43.4 to 10^47.6 erg/s) with a slope of 0.31 and 0.32\, dependi
 ng on mid-infrared band W1 and W2-band\, respectively. We corrected the ac
 cretion disk contamination in the observed MIR light flux\, obtaining a sl
 ightly changed slope of 0.37 and 0.31 for W1 and W2-band lags\, respective
 ly. While the new slope is shallower than the value of 0.5 expected from 
 thermal equilibrium model\, it is in good agreement with that obtained fro
 m the interferometric observations available in the literature. We also fo
 und wavelength dependent lags (from K to W1\, W2)\, suggesting a stratifie
 d structure of the dust torus\, such that emissions in different infrared 
 wavelengths come from the different regions of the torus.\n\nhttps://indic
 o.unina.it/event/61/contributions/878/
LOCATION:Centro Congressi Federico II Aula Magna
URL:https://indico.unina.it/event/61/contributions/878/
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