Journal ArticleDOI
Qualitative Aspects of Quasar Microlensing with Two Mass Components: Magnification Patterns and Probability Distributions
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TLDR
In this paper, it was shown that the distribution of magnifications of a point source microlensed by a randomly distributed population of intervening point masses is independent of its mass spectrum.Abstract:
It has been conjectured that the distribution of magnifications of a point source microlensed by a randomly distributed population of intervening point masses is independent of its mass spectrum. We present gedanken experiments that cast doubt on this conjecture and numerical simulations that show it to be false.read more
Citations
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Gravitational Lensing
TL;DR: Gravitational lensing has developed into one of the most powerful tools for the analysis of the dark universe as mentioned in this paper, and its main current applications and representative results achieved so far.
Journal ArticleDOI
Strong lens time delay challenge. ii. results of tdc1
Kai Liao,Kai Liao,Kai Liao,Tommaso Treu,Tommaso Treu,Phil Marshall,Christopher D. Fassnacht,N. Rumbaugh,Gregory Dobler,Gregory Dobler,Amir Aghamousa,Vivien Bonvin,Frederic Courbin,Alireza Hojjati,Alireza Hojjati,Neal Jackson,Vinay Kashyap,S. Rathna Kumar,Eric V. Linder,Eric V. Linder,Kaisey S. Mandel,Xiao-Li Meng,Georges Meylan,Leonidas A. Moustakas,Tushar P. Prabhu,Andrew Romero-Wolf,Arman Shafieloo,Arman Shafieloo,Aneta Siemiginowska,C. S. Stalin,Hyungsuk Tak,Malte Tewes,David A. van Dyk +32 more
TL;DR: The first strong lens time delay challenge was held in 2013 as discussed by the authors, where seven teams participated, submitting results from 78 different method variants, with some of the methods already reaching sub-percent accuracy.
Journal ArticleDOI
The stellar and dark matter distributions in elliptical galaxies from the ensemble of strong gravitational lenses
TL;DR: This article derived the average mass profile of elliptical galaxies from the ensemble of 161 strong gravitational lens systems selected from several surveys, assuming that the mass profile scales with the stellar mass and effective radius of each lensing galaxy.
Journal ArticleDOI
Dark Matter under the Microscope: Constraining Compact Dark Matter with Caustic Crossing Events
Jose M. Diego,Nick Kaiser,Tom Broadhurst,Tom Broadhurst,Patrick L. Kelly,Steven A. Rodney,Takahiro Morishita,Masamune Oguri,Timothy W. Ross,Adi Zitrin,Mathilde Jauzac,Mathilde Jauzac,Johan Richard,Liliya L. R. Williams,Jesús Vega-Ferrero,Jesús Vega-Ferrero,Brenda Frye,Alexei V. Filippenko +17 more
TL;DR: In this article, the authors explore different scenarios with microlenses from the intracluster medium and black holes, including primordial ones, and examine strategies to exploit these unique alignments.
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Sn refsdal: photometry and time delay measurements of the first einstein cross supernova
Steven A. Rodney,L. G. Strolger,Patrick L. Kelly,Marusa Bradac,Gabriel B. Brammer,Alexei V. Filippenko,R. J. Foley,Or Graur,Or Graur,Jens Hjorth,Saurabh Jha,Curtis McCully,Curtis McCully,Alberto Molino,Adam G. Riess,Adam G. Riess,Kasper B. Schmidt,Kasper B. Schmidt,Jonatan Selsing,Keren Sharon,Tommaso Treu,Benjamin J. Weiner,Adi Zitrin +22 more
TL;DR: In this article, the first year of Hubble Space Telescope imaging of the unique supernova (SN) "Refsdal," a gravitationally lensed SN at z = 1.488 ± 0.001 with multiple images behind the galaxy cluster MACS J1149.6+2223.
References
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Journal ArticleDOI
Fermat's principle, caustics, and the classification of gravitational lens images
Roger Blandford,Ramesh Narayan +1 more
TL;DR: In this article, a scalar description of gravitational lensing based on Fermat's principle is described, where the lensing mass is assumed to be confined to a single plane between the source and the observer and a time delay is associated with each position in the sky of a potential image.
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Quasar Microlensing at High Magnification and the Role of Dark Matter: Enhanced Fluctuations and Suppressed Saddle Points
TL;DR: In this paper, the authors show that diluting the stellar component of the lensing galaxy in a highly magnified system with smoothly distributed "dark" matter increases rather than decreases the microlensing fluctuations caused by the remaining stars.
Journal ArticleDOI
Quasar Microlensing at High Magnification and the Role of Dark Matter: Enhanced Fluctuations and Suppressed Saddlepoints
TL;DR: In this paper, the authors show that diluting the stellar component of the lensing galaxy in a highly magnified system with smoothly distributed ''dark'' matter increases rather than decreases the microlensing fluctuations caused by the remaining stars.
Journal ArticleDOI
SDSS J092455.87+021924.9: An Interesting Gravitationally Lensed Quasar from the Sloan Digital Sky Survey
Naohisa Inada,Robert H. Becker,Robert H. Becker,Scott Burles,Francisco J. Castander,Francisco J. Castander,Daniel J. Eisenstein,Patrick B. Hall,Patrick B. Hall,David E. Johnston,Bartosz Pindor,Gordon T. Richards,Paul L. Schechter,Paul L. Schechter,Maki Sekiguchi,Richard L. White,J. Brinkmann,Joshua A. Frieman,Joshua A. Frieman,Scot Kleinman,Jurek Krzesinski,Dan Long,Eric H. Neilsen,Peter R. Newman,Atsuko Nitta,Donald P. Schneider,Stephanie A. Snedden,Donald G. York +27 more
TL;DR: In this paper, the discovery of a new gravitationally lensed quasar from the Sloan Digital Sky Survey, SDSS J09245587+0219249, was reported.
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Gravitational lensing: numerical simulations with a hierarchical tree code
TL;DR: In this paper, a two-dimensional tree-code plus a multipole expansion is proposed for the determination of the deflection angle of a single lens in a cosmological lens simulation.