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Lag‐Luminosity Relationship for Interband Lags between Variations in B,V,R, and I Bands in Active Galactic Nuclei
Open accessAbstract
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 L b , 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.
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Cited by
Shappee, B. J., Prieto, J. L., Grupe, D., Kochanek, C. S., Stanek, K. Z., De Rosa, G., Mathur, S., Zu, Y., Peterson, B. M., Pogge, R. W., et al. (2014) · The Astrophysical Journal · doi:10.1088/0004-637x/788/1/48 · Cited by 1,887
Active galactic nuclei: what’s in a name?
Padovani, P., Alexander, D. M., Assef, R. J., De Marco, B., Giommi, P., Hickox, R. C., Richards, G. T., Smolčić, V., Hatziminaoglou, E., Mainieri, V., et al. (2017) · The Astronomy and Astrophysics Review · doi:10.1007/s00159-017-0102-9 · Cited by 666
Kozłowski, S., Kochanek, C. S., Udalski, A., Wyrzykowski, Ł., Soszyński, I., Szymański, M. K., Kubiak, M., Pietrzyński, G., Szewczyk, O., Ulaczyk, K., et al. (2010) · The Astrophysical Journal · doi:10.1088/0004-637x/708/2/927 · Cited by 362
A systematic search for changing-look quasars in SDSS
MacLeod, C. L., Ross, N. P., Lawrence, A., Goad, M., Horne, K., Burgett, W., Chambers, K. C., Flewelling, H., Hodapp, K., Kaiser, N., et al. (2016) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stv2997 · Cited by 323
Fausnaugh, M. M., Denney, K. D., Barth, A. J., Bentz, M. C., Bottorff, M. C., Carini, M. T., Croxall, K. V., Rosa, G. D., Goad, M. R., Horne, K., et al. (2016) · The Astrophysical Journal · doi:10.3847/0004-637x/821/1/56 · Cited by 311
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Metadata
- Authors
- Sergeev, S. G., Doroshenko, V. T., Golubinskiy, Y. V., Merkulova, N. I., & Sergeeva, E. A.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2005-03-20
- Volume
- 622
- Issue
- 1
- Pages
- 129-135
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W1990220905
- Cited by
- 186
- References
- 0
- FWCI
- 3.12
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Sergeev, S. G., Doroshenko, V. T., Golubinskiy, Y. V., Merkulova, N. I., & Sergeeva, E. A. (2005). Lag‐Luminosity Relationship for Interband Lags between Variations in B,V,R, and I Bands in Active Galactic Nuclei. The Astrophysical Journal. https://doi.org/10.1086/427820
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