26-30 June 2023
Centro Congressi Federico II
Europe/Rome timezone

Interpretation of IR variability of AGNs in the hollow, bi-conical, dust-outflow model.

Not scheduled
Aula Magna (Centro Congressi Federico II)

Aula Magna

Centro Congressi Federico II

Via Partenope, 36, Napoli, Italy
Poster Poster


Dr. Victor Oknyansky (University of Haifa)


We show that, contrary to simple predictions, most AGNs show at best
only a small increase of lags inthe J, H, K, and L bands with
increasing wavelength. We suggest that a possible cause of this near
simultaneity of the variability from the near-IR to the mid-IR is that
the hot dust is in a hollow bi-conical outflow of which we only see
the near side. In the proposed model sublimation or recreation of dust
in some cloud along our line of sight in the hollow cone could be a
factor in explaining the changing look phenomenon of an AGN. The
relative wavelength independence of IR lags simplifies the use of IR
lags for estimating cosmological parameters.

Primary author

Dr. Victor Oknyansky (University of Haifa)


Dr. C. Martin Gaskell (University of California Santa Cruz)

Presentation Materials

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