Yu, Z;
Martini, P;
Davis, TM;
Gruendl, RA;
Hoormann, JK;
Kochanek, CS;
Lidman, C;
... Vikram, V; + view all
(2020)
Quasar Accretion Disk Sizes from Continuum Reverberation Mapping in the DES Standard-star Fields.
The Astrophysical Journal: Supplement Series
, 246
(1)
, Article 16. 10.3847/1538-4365/ab5e7a.
Preview |
Text
Yu_2020_ApJS_246_16.pdf - Published Version Download (3MB) | Preview |
Abstract
Measurements of the physical properties of accretion disks in active galactic nuclei are important for better understanding the growth and evolution of supermassive black holes. We present the accretion disk sizes of 22 quasars from continuum reverberation mapping with data from the Dark Energy Survey (DES) standard-star fields and the supernova C fields. We construct continuum light curves with the griz photometry that span five seasons of DES observations. These data sample the time variability of the quasars with a cadence as short as 1 day, which corresponds to a rest-frame cadence that is a factor of a few higher than most previous work. We derive time lags between bands with both JAVELIN and the interpolated cross-correlation function method and fit for accretion disk sizes using the JAVELIN thin-disk model. These new measurements include disks around black holes with masses as small as ~107 M ⊙, which have equivalent sizes at 2500 Å as small as ~0.1 lt-day in the rest frame. We find that most objects have accretion disk sizes consistent with the prediction of the standard thin-disk model when we take disk variability into account. We have also simulated the expected yield of accretion disk measurements under various observational scenarios for the Large Synoptic Survey Telescope Deep Drilling Fields. We find that the number of disk measurements would increase significantly if the default cadence is changed from 3 days to 2 days or 1 day.
| Type: | Article |
|---|---|
| Title: | Quasar Accretion Disk Sizes from Continuum Reverberation Mapping in the DES Standard-star Fields |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3847/1538-4365/ab5e7a |
| Publisher version: | https://doi.org/10.3847/1538-4365/ab5e7a |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Quasars; Supermassive black holes; Accretion; Active galactic nuclei; Reverberation mapping |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10094904 |
Archive Staff Only
 |
View Item |
