SIMBAD references

2005ApJ...622..129S - Astrophys. J., 622, 129-135 (2005/March-3)

Lag-luminosity relationship for interband lags between variations in B, V, R, and I bands in active galactic nuclei.


Abstract (from CDS):

We determine interband lags between variations in the B band and variations in the V, R, and I bands for 14 active galactic nuclei observed at the Crimean Astrophysical Observatory. The computed lags range from tenths of a day to several days, and it is positive (that is, V, R, and I bands lag behind the B band) in most cases, except for a few cases for the V filter. In some cases, the lag is greater than zero, with more than 3 σ confidence. The lag is systematically less for the V filter than for the red filters, and the lag determined from the cross-correlation function (CCF) centroid is systematically greater than the lag determined from the CCF peak. We find that the lag scales with luminosity as Lb, where b~0.4-0.5. We attribute this lag to the light time travel effect, so it reflects the geometrical size of the region that emits optical continuum. We consider a model in which optical emission is mainly reprocessed emission that arises in the accretion disk heated by an X-ray source above the disk.

Abstract Copyright:

Journal keyword(s): Galaxies: Active - Galaxies: Nuclei - Galaxies: Photometry - Galaxies: Seyfert

VizieR on-line data: <Available at CDS (J/ApJ/622/129): objects.dat table1.dat>

Status at CDS : Associated data (images, light curves, etc...) being ingested in VizieR.

Simbad objects: 14

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