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27 April 2024 |
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Accretion Disk Size Measurement and Time Delays in the Lensed Quasar WFI 2033-4723 | | Christopher W. Morgan
; Gregory E. Hyer
; Vivien Bonvin
; Ana M. Mosquera
; Matthew Cornachione
; Frederic Courbin
; Christopher S. Kochanek
; Emilio E. Falco
; | | Date: |
Thu, 13 Dec 2018 19:17:22 GMT (1816kb,D) | | Abstract: | We present 13 seasons of $R$-band photometry of the quadruply-lensed quasar
WFI 2033-4723 from the 1.3m SMARTS telescope at CTIO and the 1.2m Euler Swiss
Telescope at La Silla, in which we detect microlensing variability of $sim0.2$
mags on a timescale of $sim$6 years. Using a Bayesian Monte Carlo technique,
we analyze the microlensing signal to obtain a measurement of the size of this
system’s accretion disk of $log (r_s/{
m cm}) = 15.86^{+0.25}_{-0.27}$ at
$lambda_{rest} = 2481{
m AA}$, assuming a $60^circ$ inclination angle. We
confirm previous measurements of the BC and AB time delays, and we obtain a
tentative measurement of the delay between the closely spaced A1 and A2 images
of $Delta t_{A1A2} = t_{A1} - t_{A2} = -3.9^{+3.4}_{-2.2}$ days. We conclude
with an update to the Quasar Accretion Disk Size - Black Hole Mass Relation, in
which we confirm that the accretion disk size predictions from simple thin disk
theory are too small. | | Source: | arXiv, 1812.5639 | | Services: | Forum | Review | PDF | Favorites | |
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