209 citations · 3.1k across the 82 of their papers we have counts for
14 papers · 1 filter
Probing the integrated Sachs-Wolfe effect using embedded lens models
Bin Chen, Ronald Kantowski
The photometry profile of the integrated Sachs-Wolfe (ISW) effect recently obtained by the Planck consortium by stacking patches of Cosmic Microwave Background (CMB) sky maps aroun…
An integrated Sachs-Wolfe effect vs redshift test for the cosmological parameters
Ronald Kantowski, Bin Chen, Xinyu Dai
We describe a method using the integrated Sachs-Wolfe (ISW) effect caused by individual inhomogeneities to determine the cosmological parameters, , , and , etc…
A Simple Gravitational Lens Model For Cosmic Voids
Bin Chen, Ronald Kantowski, Xinyu Dai
We present a simple gravitational lens model to illustrate the ease of using the embedded lensing theory when studying cosmic voids. It confirms the previously used repulsive lensi…
Embedded Lensing Time Delays, the Fermat Potential, and the Integrated Sachs-Wolfe Effect
Bin Chen, Ronald Kantowski, Xinyu Dai
We derive the Fermat potential for a spherically symmetric lens embedded in an FLRW cosmology and use it to investigate the late-time integrated Sachs-Wolfe (ISW) effect, i.e., sec…
Dust, Gas, and Metallicities of Cosmologically Distant Lens Galaxies
Bin Chen, Xinyu Dai, Christopher S. Kochanek +1
We homogeneously analyzed the \chandra\ X-ray observations of 10 gravitational lenses, HE 0047-1756, QJ 0158-4325, SDSS 0246-0805, HE 0435-1223, SDSS 0924+0219, SDSS 1004+4112, HE…
The Structure of HE 1104-1805 from Infrared to X-Ray
Jeffrey A. Blackburne, Christopher S. Kochanek, Bin Chen +2
The gravitationally lensed quasar HE 1104-1805 has been observed at a variety of wavelengths ranging from the mid-infrared to X-ray for nearly 20 years. We combine flux ratios from…
The Embedded Transparent Lens and Fermat's Least-Time Principle
Ronald Kantowski, Bin Chen, Xinyu Dai
We present a simplified version of the lowest-order embedded point mass gravitational lens theory and then make the extension of this theory to any embedded transparent lens. Embed…
Image Properties of Embedded Lenses
Ronald Kantowski, Bin Chen, Xinyu Dai
We give analytic expressions for image properties of objects seen around point mass lenses embedded in a flat CDM universe. An embedded lens in an otherwise homogeneous universe…
Further Evidence that Quasar X-Ray Emitting Regions Are Compact: X-Ray and Optical Microlensing in the Lensed Quasar Q J0158-4325
Christopher W. Morgan, Laura J. Hainline, Bin Chen +9
We present four new seasons of optical monitoring data and six epochs of X-ray photometry for the doubly-imaged lensed quasar Q J0158-4325. The high-amplitude, short-period microle…
The Optical, Ultraviolet, and X-ray Structure of the Quasar HE 0435-1223
Jeffrey A. Blackburne, Christopher S. Kochanek, Bin Chen +2
Microlensing has proven an effective probe of the structure of the innermost regions of quasars, and an important test of accretion disk models. We present light curves of the lens…
Discovery of Energy Dependent X-ray Microlensing in Q2237+0305
Bin Chen, Xinyu Dai, Christopher S. Kochanek +3
We present our long term Chandra X-ray monitoring data for the gravitationally lensed quasar Q2237+0305 with 20 epochs spanning 10 years. We easily detect microlensing variability…
The Gravitational Lens Equation for Embedded Lenses; Magnification and Ellipticity
Bin Chen, Ronald Kantowski, Xinyu Dai
We give the lens equation for light deflections caused by point mass condensations in an otherwise spatially homogeneous and flat universe. We assume the signal from a distant sour…
Time Delay in Swiss Cheese Gravitational Lensing
Bin Chen, Ronald Kantowski, Xinyu Dai
We compute time delays for gravitational lensing in a flat LambdaCDM Swiss cheese universe. We assume a primary and secondary pair of light rays are deflected by a single point mas…
Distance-redshift from an optical metric that includes absorption
Bin Chen, Ronald Kantowski
We show that it is possible to equate the intensity reduction of a light wave caused by weak absorption with a geometrical reduction in intensity caused by a "transverse" conformal…