Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:1612.04872)
· References in the article
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
A Simple and Practical Algorithm for Accurate Gravitational Magnification Maps
Authors:
Walters, S. J.; Forbes, L. K.
Affiliation:
AA(School of Mathematics and Physics, University of Tasmania, P.O. Box 37, Hobart, 7001, Tasmania, Australia), AB(School of Mathematics and Physics, University of Tasmania, P.O. Box 37, Hobart, 7001, Tasmania, Australia)
Publication:
Publications of the Astronomical Society of Australia, Volume 34, id.e006 6 pp. (PASA Homepage)
Publication Date:
01/2017
Origin:
CUP
Astronomy Keywords:
gravitational lensing: micro, methods: analytical, methods: numerical, planets and satellites: detection
Abstract Copyright:
2017: Astronomical Society of Australia
DOI:
10.1017/pasa.2016.62
Bibliographic Code:
2017PASA...34....6W

Abstract

In this brief communication, a new method is outlined for modelling magnification patterns on an observer's plane using a first-order approximation to the null geodesic path equations for a point mass lens. For each ray emitted from a source, an explicit calculation is made for the change in position on the observer's plane due to each lens mass. By counting the number of points in each small area of the observer's plane, the magnification at that point can be determined. This allows for a very simple and transparent algorithm. A short Matlab code sample for creating simple magnification maps due to multiple point lenses is included in an appendix.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

  New!

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints