optical variability of AGNs

Accretion disks around supermassive black holes in active galactic nuclei produce continuum radiation at ultraviolet and optical wavelengths. Physical processes in the accretion flow lead to stochastic variability of this emission on a wide range of time scales. We measured the optical continuum variability observed in 67 active galactic nuclei and the characteristic time scale at which the variability power spectrum flattens. We found a correlation between this time scale and the black hole mass extending over the entire mass range of supermassive black holes. This time scale is consistent with the expected thermal time scale at the ultraviolet-emitting radius in standard accretion disk theory. Accreting white dwarfs lie close to this correlation, suggesting a common process for all accretion disks.

Cone search capability for table J/other/Sci/373.789/tables1 (Summary data for the final AGN sample)

Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/other/Sci/373.789
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/Sci/373.789
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/Sci/373.789
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/other/Sci/373.789
Creator Burke C.J.; Shen Y.; Blaes O.; Gammie C.F.; Horne K.; Jiang Y.-F.; Liu X.; McHardy I.M.; Morgan C.W.; Scaringi S.; Yang Q.
Publisher CDS
Publication Year 2022
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Resource Type Dataset
Discipline Astrophysical Processes; Astrophysics and Astronomy; Galactic and extragalactic Astronomy; High Energy Astrophysics; Natural Sciences; Physics