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

Bibcode
2023AN....34430018V
DOI
10.1002/asna.20230018
Vincentelli, F. M.; Beard, M.; Hardy, I. Mc; Cackett, E.; Horne, K.; Pahari, M.
Bibliographical reference

Astronomische Nachrichten

Advertised on:
5
2023
Number of authors
6
IAC number of authors
1
Citations
0
Refereed citations
0
Description
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.
Related projects
Black hole in outburst
Black holes, neutron stars, white dwarfs and their local environment

Accreting black-holes and neutron stars in X-ray binaries provide an ideal laboratory for exploring the physics of compact objects, yielding not only confirmation of the existence of stellar mass black holes via dynamical mass measurements, but also the best opportunity for probing high-gravity environments and the physics of accretion; the most

Montserrat
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In progress
Type
Refereed
Accretion
Galaxies
Stellar & Interstellar Physics (FEEI)

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