Files in this item
Testing super-eddington accretion on to a supermassive black hole : reverberation mapping of PG 1119+120
Item metadata
dc.contributor.author | Donnan, Fergus R | |
dc.contributor.author | Hernandez Santisteban, Juan V. | |
dc.contributor.author | Horne, Keith | |
dc.contributor.author | Hu, Chen | |
dc.contributor.author | Du, Pu | |
dc.contributor.author | Li, Yan-Rong | |
dc.contributor.author | Xiao, Ming | |
dc.contributor.author | Ho, Luis C | |
dc.contributor.author | Aceituno, Jesús | |
dc.contributor.author | Wang, Jian-Min | |
dc.contributor.author | Guo, Wei-Jian | |
dc.contributor.author | Yang, Sen | |
dc.contributor.author | Jiang, Bo-Wei | |
dc.contributor.author | Yao, Zhu-Heng | |
dc.date.accessioned | 2023-05-31T12:30:05Z | |
dc.date.available | 2023-05-31T12:30:05Z | |
dc.date.issued | 2023-07-01 | |
dc.identifier | 286646847 | |
dc.identifier | ab39a19b-17d6-4368-a164-19763f1f0ed3 | |
dc.identifier | 85163064300 | |
dc.identifier.citation | Donnan , F R , Hernandez Santisteban , J V , Horne , K , Hu , C , Du , P , Li , Y-R , Xiao , M , Ho , L C , Aceituno , J , Wang , J-M , Guo , W-J , Yang , S , Jiang , B-W & Yao , Z-H 2023 , ' Testing super-eddington accretion on to a supermassive black hole : reverberation mapping of PG 1119+120 ' , Monthly Notices of the Royal Astronomical Society , vol. 523 , no. 1 , pp. 545-567 . https://doi.org/10.1093/mnras/stad1409 | en |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | Bibtex: 10.1093/mnras/stad1409 | |
dc.identifier.other | ORCID: /0000-0002-6733-5556/work/136289070 | |
dc.identifier.uri | https://hdl.handle.net/10023/27708 | |
dc.description | Funding: KH and JVHS acknowledge support from STFC grant ST/R000824/1. CH acknowledges support from the National Science Foundation of China (12122305). PD acknowledges support from NSFC grant 12022301, 11991051, and 11991054, and from National Key R&D Program of China (grant 2021YFA1600404). LCH was supported by the National Science Foundation of China (grants 11721303, 11991052,12011540375, and 12233001) and the China Manned Space Project (CMS-CSST-2021-A04, CMS-CSST-2021-A06). | en |
dc.description.abstract | We measure the black hole mass and investigate the accretion flow around the local (z = 0.0502) quasar PG 1119+120. Spectroscopic monitoring with Calar Alto provides H β lags and linewidths from which we estimate a black hole mass of log (M•/M⊙) = 7.0, uncertain by ∼0.4 dex. High cadence photometric monitoring over 2 yr with the Las Cumbres Observatory provides light curves in seven optical bands suitable for intensive continuum reverberation mapping. We identify variability on two time-scales. Slower variations on a 100-d time-scale exhibit excess flux and increased lag in the u′ band and are thus attributable to diffuse bound-free continuum emission from the broad-line region. Faster variations that we attribute to accretion disc reprocessing lack a u′-band excess and have flux and delay spectra consistent with either τ ∝ λ4/3, as expected for a temperature structure of T(R) ∝ R−3/4 for a thin accretion disc, or τ ∝ λ2 expected for a slim disc. Decomposing the flux into variable (disc) and constant (host galaxy) components, we find the disc SED to be flatter than expected with ƒv ∼ const. Modelling the SED predicts an Eddington ratio of λEdd > 1, where the flat spectrum can be reproduced by a slim disc with little dust extinction or a thin disc that requires more dust extinction. While this accretion is super-Eddington, the geometry is still unclear; however, a slim disc is expected due to the high radiation pressure at these accretion rates, and is entirely consistent with our observations. | |
dc.format.extent | 23 | |
dc.format.extent | 6200527 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | en |
dc.subject | Accretion | en |
dc.subject | Accretion discs | en |
dc.subject | Galaxies: inactive | en |
dc.subject | Galaxies: individual: PG1119+120 | en |
dc.subject | QB Astronomy | en |
dc.subject | QC Physics | en |
dc.subject | 3rd-DAS | en |
dc.subject | MCC | en |
dc.subject.lcc | QB | en |
dc.subject.lcc | QC | en |
dc.title | Testing super-eddington accretion on to a supermassive black hole : reverberation mapping of PG 1119+120 | en |
dc.type | Journal article | en |
dc.contributor.sponsor | Science & Technology Facilities Council | 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 | 10.1093/mnras/stad1409 | |
dc.description.status | Peer reviewed | en |
dc.identifier.grantnumber | ST/R00824/1 | en |
This item appears in the following Collection(s)
Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.