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:10.1002/asna.20230018

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

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

4 Citations (Scopus)

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	e230018
Journal	Astronomische Nachrichten
Volume	344
Issue number	4
DOIs	https://doi.org/10.1002/asna.20230018
Publication status	Published - 16 Feb 2023
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Funding

information STFC, Grant/Award Number: ST/R000638/1; FJC2020-043334-I, MCIN/AEI/10.13039/501100011033, NextGenerationEU/PRTR, Grant/Award Number: PID2020-120323GB-I00The 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. 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.

Funders	Funder number
UK Research and Innovation
Science and Technology Facilities Council (STFC)	FJC2020-043334-I, MCIN/AEI/10.13039/501100011033, ST/R000638/1
Ministry of Science, Innovation and Universities	PID2020‐120323GB‐I00

Keywords

accretion
accretion disks
galaxies: active

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1002/asna.20230018

Cite this

@article{acff62bd136340518be7b3bfec10977d,

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 = "Publisher Copyright: {\textcopyright} 2023 Wiley-VCH GmbH.",

year = "2023",

month = feb,

day = "16",

doi = "10.1002/asna.20230018",

language = "English",

volume = "344",

journal = "Astronomische Nachrichten",

issn = "0004-6337",

publisher = "Wiley",

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.

PY - 2023/2/16

Y1 - 2023/2/16

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

UR - https://www.scopus.com/pages/publications/85148442364

U2 - 10.1002/asna.20230018

DO - 10.1002/asna.20230018

M3 - Article

SN - 0004-6337

VL - 344

JO - Astronomische Nachrichten

JF - Astronomische Nachrichten

IS - 4

M1 - e230018

ER -

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

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this