Optical variability of quasars with 20-yr photometric light curves
dc.date.accessioned | 2022-10-28T15:43:22Z | |
dc.date.available | 2022-10-28T15:43:22Z | |
dc.date.created | 2022-09-28T09:03:03Z | |
dc.date.issued | 2022 | |
dc.identifier.citation | Stone, Zachary Shen, Yue Burke, Colin J Chen, Yu-Ching Yang, Qian Liu, Xin Gruendl, R.A. Adamów, M. Andrade-Oliveira, F. Annis, J. Bacon, D. Bertin, E. Bocquet, S. Brooks, D. Burke, D.L. Carnero Rosell, Rosell Carrasco Kind, Kind Carretero, J. Da Costa, L N Pereira, M.E.S. De Vicente, Vicente Desai, S. Diehl, H.T. Doel, P. Ferrero, Ismael Friedel, D.N. Frieman, J. García-Bellido, J. Gaztanaga, E. Gruen, D. Gutierrez, G. Hinton, S.R. Hollowood, D.L. Honscheid, K. James, D.J. Kuehn, K. Kuropatkin, N. Lidman, C. Maia, M.A.G. Menanteau, F. Miquel, R. Morgan, R. Paz-Chinchón, F. Pieres, A. Plazas Malagón, Malagon Rodriguez-Monroy, M. Sanchez, E. Scarpine, V. Serrano, S. Sevilla-Noarbe, I. Smith, M. Suchyta, E. Swanson, M.E.C. Tarle, G. To, C. . Optical variability of quasars with 20-yr photometric light curves. Monthly notices of the Royal Astronomical Society. 2022, 514(1), 164-184 | |
dc.identifier.uri | http://hdl.handle.net/10852/97404 | |
dc.description.abstract | ABSTRACT We study the optical gri photometric variability of a sample of 190 quasars within the SDSS Stripe 82 region that have long-term photometric coverage during ∼1998−2020 with SDSS, PanSTARRS-1, the Dark Energy Survey, and dedicated follow-up monitoring with Blanco 4m/DECam. With on average ∼200 nightly epochs per quasar per filter band, we improve the parameter constraints from a Damped Random Walk (DRW) model fit to the light curves over previous studies with 10–15 yr baselines and ≲ 100 epochs. We find that the average damping time-scale τDRW continues to rise with increased baseline, reaching a median value of ∼750 d (g band) in the rest frame of these quasars using the 20-yr light curves. Some quasars may have gradual, long-term trends in their light curves, suggesting that either the DRW fit requires very long baselines to converge, or that the underlying variability is more complex than a single DRW process for these quasars. Using a subset of quasars with better-constrained τDRW (less than 20 per cent of the baseline), we confirm a weak wavelength dependence of τDRW∝λ0.51 ± 0.20. We further quantify optical variability of these quasars over days to decades time-scales using structure function (SF) and power spectrum density (PSD) analyses. The SF and PSD measurements qualitatively confirm the measured (hundreds of days) damping time-scales from the DRW fits. However, the ensemble PSD is steeper than that of a DRW on time-scales less than ∼ a month for these luminous quasars, and this second break point correlates with the longer DRW damping time-scale. | |
dc.language | EN | |
dc.title | Optical variability of quasars with 20-yr photometric light curves | |
dc.title.alternative | ENEngelskEnglishOptical variability of quasars with 20-yr photometric light curves | |
dc.type | Journal article | |
dc.creator.author | Stone, Zachary | |
dc.creator.author | Shen, Yue | |
dc.creator.author | Burke, Colin J | |
dc.creator.author | Chen, Yu-Ching | |
dc.creator.author | Yang, Qian | |
dc.creator.author | Liu, Xin | |
dc.creator.author | Gruendl, R.A. | |
dc.creator.author | Adamów, M. | |
dc.creator.author | Andrade-Oliveira, F. | |
dc.creator.author | Annis, J. | |
dc.creator.author | Bacon, D. | |
dc.creator.author | Bertin, E. | |
dc.creator.author | Bocquet, S. | |
dc.creator.author | Brooks, D. | |
dc.creator.author | Burke, D.L. | |
dc.creator.author | Carnero Rosell, Rosell | |
dc.creator.author | Carrasco Kind, Kind | |
dc.creator.author | Carretero, J. | |
dc.creator.author | Da Costa, L N | |
dc.creator.author | Pereira, M.E.S. | |
dc.creator.author | De Vicente, Vicente | |
dc.creator.author | Desai, S. | |
dc.creator.author | Diehl, H.T. | |
dc.creator.author | Doel, P. | |
dc.creator.author | Ferrero, Ismael | |
dc.creator.author | Friedel, D.N. | |
dc.creator.author | Frieman, J. | |
dc.creator.author | García-Bellido, J. | |
dc.creator.author | Gaztanaga, E. | |
dc.creator.author | Gruen, D. | |
dc.creator.author | Gutierrez, G. | |
dc.creator.author | Hinton, S.R. | |
dc.creator.author | Hollowood, D.L. | |
dc.creator.author | Honscheid, K. | |
dc.creator.author | James, D.J. | |
dc.creator.author | Kuehn, K. | |
dc.creator.author | Kuropatkin, N. | |
dc.creator.author | Lidman, C. | |
dc.creator.author | Maia, M.A.G. | |
dc.creator.author | Menanteau, F. | |
dc.creator.author | Miquel, R. | |
dc.creator.author | Morgan, R. | |
dc.creator.author | Paz-Chinchón, F. | |
dc.creator.author | Pieres, A. | |
dc.creator.author | Plazas Malagón, Malagon | |
dc.creator.author | Rodriguez-Monroy, M. | |
dc.creator.author | Sanchez, E. | |
dc.creator.author | Scarpine, V. | |
dc.creator.author | Serrano, S. | |
dc.creator.author | Sevilla-Noarbe, I. | |
dc.creator.author | Smith, M. | |
dc.creator.author | Suchyta, E. | |
dc.creator.author | Swanson, M.E.C. | |
dc.creator.author | Tarle, G. | |
dc.creator.author | To, C. | |
cristin.unitcode | 185,15,3,0 | |
cristin.unitname | Institutt for teoretisk astrofysikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.cristin | 2056153 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Monthly notices of the Royal Astronomical Society&rft.volume=514&rft.spage=164&rft.date=2022 | |
dc.identifier.jtitle | Monthly notices of the Royal Astronomical Society | |
dc.identifier.volume | 514 | |
dc.identifier.issue | 1 | |
dc.identifier.startpage | 164 | |
dc.identifier.endpage | 184 | |
dc.identifier.doi | https://doi.org/10.1093/mnras/stac1259 | |
dc.subject.nvi | VDP::Astrofysikk, astronomi: 438 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0035-8711 | |
dc.type.version | PublishedVersion | |
dc.relation.project | NFR/287772 |
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