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

F. M. Vincentelli; M. Beard; I. Mc Hardy; E. Cackett; K. Horne; M. Pahari

doi:10.48550/arXiv.2302.09152

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

F. M. Vincentelli^*, M. Beard, I. Mc Hardy, E. Cackett, K. Horne, M. Pahari

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	e20230018
Number of pages	5
Journal	Astronomische Nachrichten
Volume	344
Issue number	4
Early online date	16 Feb 2023
DOIs	https://doi.org/10.48550/arXiv.2302.09152 https://doi.org/10.1002/asna.20230018
Publication status	Published - 1 May 2023

Keywords

Accretion
Accretion disks
Galaxies: active

Access to Document

10.48550/arXiv.2302.09152Licence: CC BY
10.1002/asna.20230018

Horne_2023_AN_UV-optical-lag_AAM
Copyright © 2023 Publisher / the Authors. This work has been made available online in accordance with publisher policies or with permission. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1002/asna.20230018
Accepted author manuscript, 181 KBLicence: CC BY

Cite this

@article{8a8310269aff4aafae650c7b2455b49b,

title = "The evolution of the UV/optical lag spectrum of NGC 7469 seen by the Liverpool Telescope",

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.",

keywords = "Accretion, Accretion disks, Galaxies: active",

author = "Vincentelli, {F. M.} and M. Beard and Hardy, {I. Mc} and E. Cackett and K. Horne and M. Pahari",

note = "Funding: 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.",

year = "2023",

month = may,

day = "1",

doi = "10.48550/arXiv.2302.09152",

language = "English",

volume = "344",

journal = "Astronomische Nachrichten",

issn = "0004-6337",

publisher = "Wiley-VCH, Weinheim",

number = "4",

}

TY - JOUR

T1 - The evolution of the UV/optical lag spectrum of NGC 7469 seen by the Liverpool Telescope

AU - Vincentelli, F. M.

AU - Beard, M.

AU - Hardy, I. Mc

AU - Cackett, E.

AU - Horne, K.

AU - Pahari, M.

N1 - Funding: 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.

PY - 2023/5/1

Y1 - 2023/5/1

N2 - 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.

AB - 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.

KW - Accretion

KW - Accretion disks

KW - Galaxies: active

U2 - 10.48550/arXiv.2302.09152

DO - 10.48550/arXiv.2302.09152

M3 - Article

SN - 0004-6337

VL - 344

JO - Astronomische Nachrichten

JF - Astronomische Nachrichten

IS - 4

M1 - e20230018

ER -

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

Abstract

Keywords

Access to Document

Fingerprint

Cite this