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Anomalous behaviour of the UV-optical continuum bands in NGC 5548
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dc.contributor.author | Goad, M. R. | |
dc.contributor.author | Knigge, C. | |
dc.contributor.author | Korista, K. T. | |
dc.contributor.author | Cackett, E. | |
dc.contributor.author | Horne, K. | |
dc.contributor.author | Starkey, D. A. | |
dc.contributor.author | Peterson, B. M. | |
dc.contributor.author | De Rosa, G. | |
dc.contributor.author | Kriss, G. A. | |
dc.contributor.author | Edelson, R. | |
dc.contributor.author | Fausnaugh, M. | |
dc.date.accessioned | 2019-05-14T09:30:06Z | |
dc.date.available | 2019-05-14T09:30:06Z | |
dc.date.issued | 2019-04-30 | |
dc.identifier | 258940792 | |
dc.identifier | f485adcd-69f1-416f-85e6-fa90ae7a5b62 | |
dc.identifier | 85068004786 | |
dc.identifier | 000474908200066 | |
dc.identifier.citation | Goad , M R , Knigge , C , Korista , K T , Cackett , E , Horne , K , Starkey , D A , Peterson , B M , De Rosa , G , Kriss , G A , Edelson , R & Fausnaugh , M 2019 , ' Anomalous behaviour of the UV-optical continuum bands in NGC 5548 ' , Monthly Notices of the Royal Astronomical Society . https://doi.org/10.1093/mnras/stz1186 | en |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1904.12588v1 | |
dc.identifier.uri | https://hdl.handle.net/10023/17698 | |
dc.description.abstract | During the 2014 HST/Swift and ground-based multi-wavelength monitoring campaign of NGC 5548 (AGN STORM), the UV–optical broad emission lines exhibited anomalous, decorrelated behaviour relative to the far-UV continuum flux variability. Here, we use key diagnostic emission lines (Lyα and He ii) for this campaign to infer a proxy for the all important, variable driving EUV continuum incident upon BLR clouds. The inferred driving continuum provides a crucial step towards the recovery of the broad emission line response functions in this AGN. In particular, the ionising continuum seen by the BLR was weaker and softer during the anomalous period than during the first third of the campaign, and apparently less variable than exhibited by the far-UV continuum. We also report the first evidence for anomalous behaviour in the longer wavelength (relative to λ1157Å) continuum bands. This is corroborative evidence that a significant contribution to the variable UV–optical continuum emission arises from a diffuse continuum emanating from the same gas that emits the broad emission lines. | |
dc.format.extent | 1419425 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | en |
dc.subject | Galaxies: active | en |
dc.subject | Galaxies: individual (NGC 5548) | en |
dc.subject | Galaxies: nuclei | en |
dc.subject | Galaxies: Seyfert | en |
dc.subject | QB Astronomy | en |
dc.subject | QC Physics | en |
dc.subject | 3rd-NDAS | en |
dc.subject.lcc | QB | en |
dc.subject.lcc | QC | en |
dc.title | Anomalous behaviour of the UV-optical continuum bands in NGC 5548 | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. St Andrews Centre for Exoplanet Science | en |
dc.identifier.doi | https://doi.org/10.1093/mnras/stz1186 | |
dc.description.status | Peer reviewed | en |
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