Статья

TIME DELAY AND ACCRETION DISK SIZE MEASUREMENTS IN THE LENSED QUASAR SBS 0909+532 FROM MULTIWAVELENGTH MICROLENSING ANALYSIS

L. J. HainlineDepartment of Physics, United States Naval Academy, 572C Holloway Rd, Annapolis, MD 21402, USA; [email protected], [email protected], [email protected], [email protected]Christopher W. MorganDepartment of Physics, United States Naval Academy, 572C Holloway Rd, Annapolis, MD 21402, USA; [email protected], [email protected], [email protected], [email protected]Chelsea L. MacLeodDepartment of Physics, United States Naval Academy, 572C Holloway Rd, Annapolis, MD 21402, USA; [email protected], [email protected], [email protected], [email protected]Zachary D. LandaalDepartment of Physics, United States Naval Academy, 572C Holloway Rd, Annapolis, MD 21402, USA; [email protected], [email protected], [email protected], [email protected]C. S. KochanekDepartment of Astronomy, The Ohio State University, 140 West 18th Ave, Columbus, OH 43210, USA; [email protected]Hugh C. HarrisUnited States Naval Observatory, Flagstaff Station, 10391 West Naval Observatory Road, Flagstaff, AZ 86001-8521, USA; [email protected], [email protected]T. TillemanUnited States Naval Observatory, Flagstaff Station, 10391 West Naval Observatory Road, Flagstaff, AZ 86001-8521, USA; [email protected], [email protected]L. J. GoicoecheaFacultad de Ciencias, Universidad de Cantabria, Avda. de Los Castros s/n, E-39005 Santander, Spain; [email protected]V. N. ShalyapinFacultad de Ciencias, Universidad de Cantabria, Avda. de Los Castros s/n, E-39005 Santander, Spain; [email protected]E. FalcoHarvard-Smithsonian Center for Astrophysics, 60 Garden St, Cambridge, MA 02138, USA; [email protected]

2013en

ABI

Аннотация

We present three complete seasons and two half-seasons of Sloan Digital Sky Survey (SDSS) r-band photometry of the gravitationally lensed quasar SBS 0909+532 from the U.S. Naval Observatory, as well as two seasons each of SDSS g-band and r-band monitoring from the Liverpool Robotic Telescope. Using Monte Carlo simulations to simultaneously measure the system’s time delay and model the r-band microlensing variability, we confirm and significantly refine the precision of the system’s time delay to ΔtAB = 50+2−4 days, where the stated uncertainties represent the bounds of the formal 1σ confidence interval. There may be a conflict between the time delay measurement and a lens consisting of a single galaxy. While models based on the Hubble Space Telescope astrometry and a relatively compact stellar distribution can reproduce the observed delay, the models have somewhat less dark matter than we would typically expect. We also carry out a joint analysis of the microlensing variability

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Идентификаторы

DOI: 10.1088/0004-637x/774/1/69

Цитирования и источники

Цитирований: 3Использованных источников: 0

Показатели — AkademScholar