The evolution of the UV/ optical lag spectrum of NGC 7469 seen by the Liverpool Telescope
The evolution of the UV/ optical lag spectrum of NGC 7469 seen by the Liverpool Telescope
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.
accretion, accretion disks, galaxies: active
Vincentelli, F.M.
6205bc3a-be9b-4a74-8cd3-bef2ce57e73e
Beard, Max
9743e0a5-2d24-43c5-956b-209b398459c7
McHardy, Ian
4f215137-9cc4-4a08-982e-772a0b24c17e
Cackett, E.
a8aef5c7-0f85-4c63-9d01-933adf24c04a
Horne, K.
53fcebf2-d0a1-453a-b141-6174ac5e4afe
Pahari, M.
df2879b8-756c-4220-b965-d42a4ebfd6cc
May 2023
Vincentelli, F.M.
6205bc3a-be9b-4a74-8cd3-bef2ce57e73e
Beard, Max
9743e0a5-2d24-43c5-956b-209b398459c7
McHardy, Ian
4f215137-9cc4-4a08-982e-772a0b24c17e
Cackett, E.
a8aef5c7-0f85-4c63-9d01-933adf24c04a
Horne, K.
53fcebf2-d0a1-453a-b141-6174ac5e4afe
Pahari, M.
df2879b8-756c-4220-b965-d42a4ebfd6cc
Vincentelli, F.M., Beard, Max, McHardy, Ian, Cackett, E., Horne, K. and Pahari, M.
(2023)
The evolution of the UV/ optical lag spectrum of NGC 7469 seen by the Liverpool Telescope.
Astronomische Nachrichten, 344 (4), [e230018].
(doi:10.1002/asna.20230018).
Abstract
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.
Text
The evolution of the UV optical lag spectrum of NGC 7469 seen by the Liverpool Telescope
- Accepted Manuscript
More information
Accepted/In Press date: 13 January 2023
e-pub ahead of print date: 16 February 2023
Published date: May 2023
Additional Information:
Funding Information:
The authors are grateful to the anonymous referee for the comments which significantly improved the manuscript. This project was supported by the STFC funding ST/R000638/1. F. M. Vincentelli acknowledges financial support from grant FJC2020‐043334‐I financed by MCIN/AEI/10.13039/501100011033 and NextGenerationEU/PRTR as well as from the Spanish Ministery of Science and Innovation research project PID2020‐120323GB‐I00.
Publisher Copyright:
© 2023 Wiley-VCH GmbH.
Keywords:
accretion, accretion disks, galaxies: active
Identifiers
Local EPrints ID: 476792
URI: http://eprints.soton.ac.uk/id/eprint/476792
ISSN: 0004-6337
PURE UUID: f1cdcfcf-4741-4150-88e8-e3f6529f9d60
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Date deposited: 16 May 2023 16:41
Last modified: 17 Mar 2024 07:43
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Contributors
Author:
F.M. Vincentelli
Author:
Max Beard
Author:
Ian McHardy
Author:
E. Cackett
Author:
K. Horne
Author:
M. Pahari
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