The evolution of the UV/optical lag spectrum of NGC 7469 seen by the Liverpool Telescope

被引：2

作者：

Vincentelli, F. M. ^{[1
,2
,3
,7
]}

Beard, M. ^{[3
]}

Hardy, I. Mc ^{[3
]}

Cackett, E. ^{[4
]}

Horne, K. ^{[5
]}

Pahari, M. ^{[6
]}

机构：

[1] Inst Astrofis Canarias, Tenerife, Spain

[2] Univ La Laguna, Dept Astrofis, Tenerife, Spain

[3] Univ Southampton, Dept Phys Astron, Southampton, England

[4] Wayne State Univ, Dept Phys Astron, Detroit, MI USA

[5] Univ St Andrews, SUPA Phys & Astron, St Andrews, Scotland

[6] Indian Inst Technol, Dept Phys, Hyderabad, India

[7] Inst Astrofis Canarias, E-38205 San Cristobal la Laguna, Spain

来源：

ASTRONOMISCHE NACHRICHTEN | 2023年 / 344卷 / 04期

关键词：

accretion; accretion disks; galaxies; active; ACTIVE GALACTIC NUCLEI; X-RAY-EMISSION; CONTINUUM EMISSION; ACCRETION DISK; OPTICAL CONTINUUM; SPACE TELESCOPE; REVERBERATION; SWIFT; VARIABILITY; ORIGIN;

D O I：

10.1002/asna.20230018

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results regarding the analysis of an intensive monitoring of the Active Galactic Nucleus (AGN) NGC 7469. We observed the source for 4 months with almost daily cadence in the ugriz bands, using the IO:O on the Liverpool Telescope. We measured the lags with respect to the u band and found a clear change in the lag spectrum between the first and the second half of the campaign. Given that the source varies on different timescales during these two segments, it is likely that different components are dominating the variability at different times. This result further confirms that reverberation models require a more complex geometry than a static illuminating point source and that particular attention has to be given in the interpretation of these delays.

引用

页数：5

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