A Study of Gravitational Lens Chromaticity with the Hubble Space Telescope

Abstract

We report Hubble Space Telescope observations of 6 gravitational lenses with the Advanced Camera for Surveys. We measured the flux ratios between the lensed images in 6 filters from 8140Å to 2200Å. In 3 of the systems, HE0512$-$3329, B1600+434, and H1413+117, we were able to construct UV extinction curves partially overlapping the 2175Å feature and characterize the properties of the dust relative to the Galaxy and the Magellanic Clouds. In HE1104$-$1804 we detect chromatic microlensing and use it to study the physical properties of the quasar accretion disk. For a Gaussian model of the disk $\exp (-r^2/2r_s^2)$, scaling with wavelength as $r_s\propto {\lambda }^p$, we estimate $r_s(\lambda 3363)=4_{-2}^{+4}$ ($7\pm 4$) light-days and $p=1.1\pm 0.6$ ($1.0\pm 0.6$) for a logarithmic (linear) prior on $r_s$. The remaining two systems, FBQ0951+2635 and SBS1520+530, yielded no useful estimates of extinction or chromatic microlensing.

31 pages, 12 figures, 4 tables, ApJ submitted

References in corpus (17)

• The propagation of uncertainties in stellar population synthesis modeling I: The relevance of uncertain aspects of stellar evolution and the IMF to the derived physical properties of galaxies
• Modeling the Time Variability of SDSS Stripe 82 Quasars as a Damped Random Walk
• Sizes and Temperature Profiles of Quasar Accretion Disks from Chromatic Microlensing
• The Spatial Structure of An Accretion Disk
• Microlensing variability in the gravitationally lensed quasar QSO 2237+0305 = the Einstein Cross. II. Energy profile of the accretion disk
• X-Ray and Optical Microlensing in the Lensed Quasar PG 1115+080
• The line-of-sight towards GRB 030429 at z = 2.66: Probing the matter at stellar, galactic and intergalactic scales
• The multiple quasar Q2237+0305 under a microlensing caustic
• A microlensing study of the accretion disc in the quasar MG 0414+0534
• Gravitational Microlensing
• Disentangling microlensing and differential extinction in the double QSO HE0512-3329
• Extinction Curves of Lensing Galaxies out to z=1
• COSMOGRAIL: the COSmological MOnitoring of GRAvItational Lenses VI. Redshift of the lensing galaxy in seven gravitationally lensed quasars
• An optical time delay for the double gravitational lens system FBQ 0951+2635
• A Study of Gravitational Lens Chromaticity using Ground-based Narrow Band Photometry
• Origin of Chromatic Features in Multiple Quasars -Variability, Dust, or Microlensing -
• Microlensing variability in time-delay quasars

Cited by in corpus (26)

• Microlensing of the broad line region in 17 lensed quasars
• A Robust Determination of the size of quasar accretion disks using gravitational microlensing
• The Average Size and Temperature Profile of Quasar Accretion Disks
• Dark Matter Fraction in Lens Galaxies: New Estimates from Microlensing
• X-ray Monitoring of Gravitational Lenses With Chandra
• A Consistent Picture Emerges: A Compact X-ray Continuum Emission Region in the Gravitationally Lensed Quasar SDSS J0924+0219
• Measuring Microlensing using Spectra of Multiply Lensed Quasars
• Detection of Substructure in the Gravitationally Lensed Quasar MG0414+0534 using Mid-Infrared and Radio VLBI Observations
• The Structure of HE 1104-1805 from Infrared to X-Ray
• Observations of radio-quiet quasars at 10mas resolution by use of gravitational lensing
• Probing the Broad Line Region and the Accretion Disk in the Lensed Quasars HE0435-1223, WFI2033-4723, and HE2149-2745 using Gravitational Microlensing
• Quasar Microlensing Variability Studies Favor Shallow Accretion Disk Temperature Profiles
• Structure of the Accretion Disk in the Lensed Quasar Q2237+0305 from Multi-Epoch and Multi-Wavelength Narrow Band Photometry
• Strong Chromatic Microlensing in HE0047-1756 and SDSS1155+6346
• HST imaging of four gravitationally lensed quasars
• GERLUMPH Data Release 2: 2.5 billion simulated microlensing light curves
• Gravitational lens system SDSS J1339+1310: microlensing factory and time delay
• H-AMR FORGE'd in FIRE I: Magnetic state transitions, jet launching and radiative emission in super-Eddington, highly magnetized quasar disks formed from cosmological initial conditions
• Evidence for two spatially separated UV continuum emitting regions in the Cloverleaf broad absorption line quasar
• A look at the generalized Darboux transformations for the quasinormal spectra in Schwarzschild black hole perturbation theory: just how general should it be?
• Observations of the Lensed Quasar Q2237+0305 with CanariCam at GTC
• High-resolution imaging with the International LOFAR Telescope: Observations of the gravitational lenses MG 0751+2716 and CLASS B1600+434
• Asymptotically AdS black hole with a conformally-coupled scalar field in the first-order formalism of gravity
• Black Hole masses for 14 gravitational lensed quasars
• A method for the microlensed flux variance of QSOs
• f(R) Gravity, relic coherent gravitons and optical chaos