Gravitational lensing: numerical simulations with a hierarchical tree code
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TLDR
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.About:
This article is published in Journal of Computational and Applied Mathematics.The article was published on 1999-09-30 and is currently open access. It has received 91 citations till now. The article focuses on the topics: Lens (optics) & Gravitational lens.read more
Citations
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Quantitative Interpretation of Quasar Microlensing Light Curves
TL;DR: In this article, the authors developed a general method for analyzing the light curves of microlensed quasars and applied it to the OGLE light curve of the four-image lens Q2237+0305.
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Quasar Accretion Disks are Strongly Inhomogeneous
Jason Dexter,Eric Agol +1 more
TL;DR: In this paper, the authors investigate toy models of quasar accretion disks consisting of a number of regions, n, whose temperatures vary independently with an amplitude of {sigma}{sub T} in dex.
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Size is everything : universal features of quasar microlensing with extended sources
Michael J. Mortonson,Michael J. Mortonson,Paul L. Schechter,Joachim Wambsganss,Joachim Wambsganss +4 more
TL;DR: In this paper, the authors examined the effect of the shape of the source brightness profile on the magnitude fluctuations of images in quasar lens systems due to microlensing and found that the micro-lensing fluctuations are relatively insensitive to all properties of the models except the half-light radius of the disk.
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Zooming into the broad line region of the gravitationally lensed quasar QSO 2237 + 0305 ≡ the Einstein Cross - III. Determination of the size and structure of the C iv and C iii] emitting regions using microlensing
Dominique Sluse,R. W. Schmidt,Frederic Courbin,Damien Hutsemekers,Georges Meylan,A. Eigenbrod,Timo Anguita,Eric Agol,Joachim Wambsganss +8 more
TL;DR: This work uses microlensing taking place in the lensed quasar QSO QSO 2237+0305 to study the structure of the broad line region (BLR) and measure the size of the region emitting the C-IV and C-III] lines.
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The multiple quasar Q2237+0305 under a microlensing caustic
Timo Anguita,R. W. Schmidt,Edwin L. Turner,Joachim Wambsganss,Rachel L. Webster,Karen Loomis,Dan Long,Russet McMillan +7 more
TL;DR: In this article, the authors used the high magnification event seen in the 1999 OGLE campaign light curve of image C of the quadruply imaged gravitational lens Q2237+0305 to study the structure of the quasar engine.
References
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Numerical Recipes, The Art of Scientific Computing
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A hierarchical O(N log N) force-calculation algorithm
Josh Barnes,Piet Hut +1 more
TL;DR: A novel method of directly calculating the force on N bodies that grows only as N log N is described, using a tree-structured hierarchical subdivision of space into cubic cells, each is recursively divided into eight subcells whenever more than one particle is found to occupy the same cell.
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Measurements* of the Cosmological Parameters Ω and Λ from the First Seven Supernovae at z ≥ 0.35
Saul Perlmutter,Saul Perlmutter,S. Gabi,S. Gabi,Gerson Goldhaber,Gerson Goldhaber,Ariel Goobar,Ariel Goobar,Ariel Goobar,D. E. Groom,D. E. Groom,I. M. Hook,A. G. Kim,A. G. Kim,Min Kook Kim,Julia C. Lee,R. Pain,R. Pain,Carlton R. Pennypacker,Carlton R. Pennypacker,I. A. Small,I. A. Small,Richard S. Ellis,Richard G. McMahon,B. J. Boyle,P. S. Bunclark,David Carter,Mike Irwin,Karl Glazebrook,H. J. M. Newberg,Alexei V. Filippenko,Thomas Matheson,Michael A. Dopita,Warrick J. Couch +33 more
TL;DR: In this article, the authors used a light-curve width-corrected magnitudes as a function of redshift of distant (z = 0.35-0.46) supernovae to obtain a global measurement of the mass density.