Files in this item
The black hole mass of the z=2.805 multiply imaged quasar SDSS J2222+2745 from velocity-resolved time lags of the C iv emission line
Item metadata
dc.contributor.author | Williams, PR | |
dc.contributor.author | Treu, T | |
dc.contributor.author | Dahle, H | |
dc.contributor.author | Valenti, S | |
dc.contributor.author | Abramson, L | |
dc.contributor.author | Barth, AJ | |
dc.contributor.author | Dyrland, K | |
dc.contributor.author | Gladders, M | |
dc.contributor.author | Horne, K | |
dc.contributor.author | Sharon, K | |
dc.date.accessioned | 2022-12-15T08:30:05Z | |
dc.date.available | 2022-12-15T08:30:05Z | |
dc.date.issued | 2021-04-16 | |
dc.identifier | 274004856 | |
dc.identifier | 214024d7-1e91-474f-8e0b-ed0ee62d0b62 | |
dc.identifier | 000641583600001 | |
dc.identifier | 85105085362 | |
dc.identifier.citation | Williams , PR , Treu , T , Dahle , H , Valenti , S , Abramson , L , Barth , AJ , Dyrland , K , Gladders , M , Horne , K & Sharon , K 2021 , ' The black hole mass of the z =2.805 multiply imaged quasar SDSS J2222+2745 from velocity-resolved time lags of the C iv emission line ' , Astrophysical Journal , vol. 911 , no. 1 , 64 . https://doi.org/10.3847/1538-4357/abe943 | en |
dc.identifier.issn | 0004-637X | |
dc.identifier.other | RIS: urn:B518691D51C64BB01EB550149A9CB2CA | |
dc.identifier.uri | https://hdl.handle.net/10023/26597 | |
dc.description | P.W. and T.T. gratefully acknowledge support by the National Science Foundation through grant AST-1907208 "Collaborative Research: Establishing the foundations of black hole mass measurements of AGN across cosmic time" and the Packard Foundation through a Packard Research Fellowship to T.T. Research at UC Irvine was supported by NSF grant AST-1907290. K.H. acknowledges support from STFC grant ST/R000824/1. | en |
dc.description.abstract | We present the first results of a 4.5 yr monitoring campaign of the three bright images of multiply imaged z = 2.805 quasar SDSS J2222+2745 using the Gemini North Multi-Object Spectrograph and the Nordic Optical Telescope. We take advantage of gravitational time delays to construct light curves surpassing 6 yr in duration in the observed frame and achieve an average spectroscopic cadence of 10 days during the 8 months of visibility per season. Using multiple secondary calibrators and advanced reduction techniques, we achieve percent-level spectrophotometric precision and carry out an unprecedented reverberation mapping analysis, measuring both integrated and velocity-resolved time lags for the C iv emission line. The full line lags the continuum by Τ(cen)=36.5-3.9+2.9 rest-frame days. We combine our measurement with published C iv emission line lags and derive the r(BLR) - L relationship log10 (Τ/day)=(0.99 +/- 0.07)+(0.48 +/- 0.03)log10 [λLλ(1350AA)/1044erg s-1] with 0.30 +/- 0.06 dex intrinsic scatter. The velocity-resolved lags are consistent with circular Keplerian orbits, with Τ(cen)=86.2-5.0+4.5, 25-15+11 and 7.5-3.5+4.2 rest-frame days for the core, blue wing, and red wing, respectively. Using σline with the mean spectrum and assuming log10(fmean,σ)=0.52 +/- 0.26, we derive log10(MBH/M☉)=8.63 +/- 0.27 . Given the quality of the data, this system represents a unique benchmark for calibration of M-BH estimators at high redshift. Future work will present dynamical modeling of the data to constrain the virial factor f and MBH. | |
dc.format.extent | 18 | |
dc.format.extent | 4507079 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astrophysical Journal | en |
dc.subject | Active galactic nuclei | en |
dc.subject | Strong gravitional lensing | en |
dc.subject | Reverberation mapping | en |
dc.subject | Supermassive black holes | en |
dc.subject | QB Astronomy | en |
dc.subject | QC Physics | en |
dc.subject | NDAS | en |
dc.subject | AC | en |
dc.subject.lcc | QB | en |
dc.subject.lcc | QC | en |
dc.title | The black hole mass of the z=2.805 multiply imaged quasar SDSS J2222+2745 from velocity-resolved time lags of the C iv emission line | 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 | https://doi.org/10.3847/1538-4357/abe943 | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | https://arxiv.org/abs/2011.02007 | 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.