Intensive disc-reverberation mapping of Fairall 9
| Autor: | S. Valenti, A. A. Breeveld, W. N. Brandt, J. M. Gelbord, D. A. Starkey, M. H. Siegel, Marianne Vestergaard, K. L. Page, Bradley M. Peterson, Dirk Grupe, Christopher A. Onken, Kirk T. Korista, S. J. Laporte, E. Dalla Bontà, D. Mudd, Smita Mathur, Phil Uttley, Aaron J. Barth, Michael D. Joner, P. A. Evans, Gerard A. Kriss, Hagai Netzer, D. Gonzalez-Buitrago, J. V. Hernández Santisteban, M. R. Goad, Gary J. Ferland, T. Schmidt, Susanna Bisogni, Anne M. Lohfink, Keith Horne, Rick Edelson, Edward M. Cackett, S. B. Cenko, Simon Vaughan, Missagh Mehdipour, F. E. Marshall |
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| Přispěvatelé: | ITA, USA, GBR, High Energy Astrophys. & Astropart. Phys (API, FNWI) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
ACTIVE GALACTIC NUCLEI
CONTINUUM EMISSION Astrophysics::High Energy Astrophysical Phenomena individual: Fairall 9 [quasars] BROAD-LINE REGION SOFTWARE Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Spectral line law.invention Telescope symbols.namesake VIEW Observatory law 0103 physical sciences DISTRIBUTIONS 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics LAGS Physics 010308 nuclear & particles physics Balmer series Astronomy and Astrophysics Quasar Light curve VARIABILITY Space and Planetary Science active [galaxies] X-RAY symbols Reverberation mapping Spectral energy distribution accretion accretion discs ACCRETION DISC |
| Zdroj: | Monthly Notices of the Royal Astronomical Society, 498(4), 5399-5416. Oxford University Press Santisteban, J V H, Edelson, R, Horne, K, Gelbord, J M, Barth, A J, Cackett, E M, Goad, M R, Netzer, H, Starkey, D, Uttley, P, Brandt, W N, Korista, K, Lohfink, A M, Onken, C A, Page, K L, Siegel, M, Vestergaard, M, Bisogni, S, Breeveld, A A, Cenko, S B, Dalla Bonta, E, Evans, P A, Ferland, G, Gonzalez-Buitrago, D H, Grupe, D, Joner, M D, Kriss, G, LaPorte, S J, Mathur, S, Marshall, F, Mehdipour, M, Mudd, D, Peterson, B M, Schmidt, T, Vaughan, S & Valenti, S 2020, ' Intensive disc-reverberation mapping of Fairall 9 : first year of Swift and LCO monitoring ', Monthly Notices of the Royal Astronomical Society, vol. 498, no. 4, pp. 5399-5416 . https://doi.org/10.1093/mnras/staa2365 |
| ISSN: | 0035-8711 |
| DOI: | 10.1093/mnras/staa2365 |
| Popis: | We present results of time-series analysis of the first year of the Fairall 9 intensive disc-reverberation campaign. We used Swift and the Las Cumbres Observatory global telescope network to continuously monitor Fairall 9 from X-rays to near-infrared at a daily to subdaily cadence. The cross-correlation function between bands provides evidence for a lag spectrum consistent with the τ ∝ λ4/3 scaling expected for an optically thick, geometrically thin blackbody accretion disc. Decomposing the flux into constant and variable components, the variable component’s spectral energy distribution is slightly steeper than the standard accretion disc prediction. We find evidence at the Balmer edge in both the lag and flux spectra for an additional bound-free continuum contribution that may arise from reprocessing in the broad-line region. The inferred driving light curve suggests two distinct components, a rapidly variable (100 d) component with an opposite lag to the reverberation signal. |
| Databáze: | OpenAIRE |
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