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Continuum reverberation mapping of Mrk 876 over three years with remote robotic observatories
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dc.contributor.author | Miller, Jake A. | |
dc.contributor.author | Cackett, Edward Michael | |
dc.contributor.author | Goad, Michael R. | |
dc.contributor.author | Horne, Keith Douglas | |
dc.contributor.author | Barth, Aaron J. | |
dc.contributor.author | Romero-Colmenero, Encarni | |
dc.contributor.author | Fausnaugh, Michael | |
dc.contributor.author | Gelbord, Jonathan | |
dc.contributor.author | Korista, Kirk T. | |
dc.contributor.author | Landt, Hermine | |
dc.contributor.author | Treu, Tommaso | |
dc.contributor.author | Winkler, Hartmut | |
dc.date.accessioned | 2023-09-13T16:30:08Z | |
dc.date.available | 2023-09-13T16:30:08Z | |
dc.date.issued | 2023-08-11 | |
dc.identifier | 293745364 | |
dc.identifier | ffa1f263-24da-462e-bc4a-be2317d065ae | |
dc.identifier | 85176332592 | |
dc.identifier.citation | Miller , J A , Cackett , E M , Goad , M R , Horne , K D , Barth , A J , Romero-Colmenero , E , Fausnaugh , M , Gelbord , J , Korista , K T , Landt , H , Treu , T & Winkler , H 2023 , ' Continuum reverberation mapping of Mrk 876 over three years with remote robotic observatories ' , Astrophysical Journal . https://doi.org/10.3847/1538-4357/ace342 | en |
dc.identifier.issn | 0004-637X | |
dc.identifier.uri | https://hdl.handle.net/10023/28368 | |
dc.description | Funding: Research at UC Irvine is supported by NSF grant AST-1907290. HL acknowledges a Daphne Jackson Fellowship sponsored by the Science and Technology Facilities Council (STFC), UK. ERC acknowledges support by the NRF of South Africa. TT acknowledges support from NSF through grant NSF-AST-1907208. | en |
dc.description.abstract | Continuum reverberation mapping probes the sizescale of the optical continuum-emitting region in active galactic nuclei (AGN). Through 3 years of multiwavelength photometric monitoring in the optical with robotic observatories, we perform continuum reverberation mapping on Mrk~876. All wavebands show large amplitude variability and are well correlated. Slow variations in the light curves broaden the cross-correlation function (CCF) significantly, requiring detrending in order to robustly recover interband lags. We measure consistent interband lags using three techniques (CCF, JAVELIN, PyROA), with a lag of around 13~days from u to z. These lags are longer than the expected radius of 12~days for the self-gravitating radius of the disk. The lags increase with wavelength roughly following λ4/3, as would be expected from thin disk theory, but the lag normalization is approximately a factor of 3 longer than expected, as has also been observed in other AGN. The lag in the i band shows an excess which we attribute to variable Hα broad-line emission. A flux-flux analysis shows a variable spectrum that follows fν ∝ λ-1/3 as expected for a disk, and an excess in the i band that also points to strong variable Hα emission in that band. | |
dc.format.extent | 1010273 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astrophysical Journal | en |
dc.subject | QB Astronomy | en |
dc.subject | QC Physics | en |
dc.subject | 3rd-DAS | en |
dc.subject.lcc | QB | en |
dc.subject.lcc | QC | en |
dc.title | Continuum reverberation mapping of Mrk 876 over three years with remote robotic observatories | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. St Andrews Centre for Exoplanet Science | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.identifier.doi | https://doi.org/10.3847/1538-4357/ace342 | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | https://arxiv.org/abs/2307.02630 | en |
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