St Andrews Research Repository

St Andrews University Home
View Item 
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  • Login
JavaScript is disabled for your browser. Some features of this site may not work without it.

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

Thumbnail
View/Open
Williams_2021_ApJ_Blackholemass_AAM.pdf (4.298Mb)
Date
16/04/2021
Author
Williams, PR
Treu, T
Dahle, H
Valenti, S
Abramson, L
Barth, AJ
Dyrland, K
Gladders, M
Horne, K
Sharon, K
Funder
Science & Technology Facilities Council
Grant ID
ST/R00824/1
Keywords
Active galactic nuclei
Strong gravitional lensing
Reverberation mapping
Supermassive black holes
QB Astronomy
QC Physics
NDAS
AC
Metadata
Show full item record
Altmetrics Handle Statistics
Altmetrics DOI Statistics
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.
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
Publication
Astrophysical Journal
Status
Peer reviewed
DOI
https://doi.org/10.3847/1538-4357/abe943
ISSN
0004-637X
Type
Journal article
Rights
Copyright © 2021. The American Astronomical Society. All rights reserved. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.3847/1538-4357/abe943
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.
Collections
  • University of St Andrews Research
URL
https://arxiv.org/abs/2011.02007
URI
http://hdl.handle.net/10023/26597

Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

Advanced Search

Browse

All of RepositoryCommunities & CollectionsBy Issue DateNamesTitlesSubjectsClassificationTypeFunderThis CollectionBy Issue DateNamesTitlesSubjectsClassificationTypeFunder

My Account

Login

Open Access

To find out how you can benefit from open access to research, see our library web pages and Open Access blog. For open access help contact: openaccess@st-andrews.ac.uk.

Accessibility

Read our Accessibility statement.

How to submit research papers

The full text of research papers can be submitted to the repository via Pure, the University's research information system. For help see our guide: How to deposit in Pure.

Electronic thesis deposit

Help with deposit.

Repository help

For repository help contact: Digital-Repository@st-andrews.ac.uk.

Give Feedback

Cookie policy

This site may use cookies. Please see Terms and Conditions.

Usage statistics

COUNTER-compliant statistics on downloads from the repository are available from the IRUS-UK Service. Contact us for information.

© University of St Andrews Library

University of St Andrews is a charity registered in Scotland, No SC013532.

  • Facebook
  • Twitter