Skip to main content
×
Home
    • Aa
    • Aa

A Simple and Practical Algorithm for Accurate Gravitational Magnification Maps

  • S. J. Walters (a1) and L. K. Forbes (a1)
Abstract
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.

Copyright
Corresponding author
1 Email: sjw1@utas.edu.au
Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

N. F. Bate , C. J. Fluke , B. R. Barsdell , H. Garsden , & G. F. Lewis 2010, NewA, 15, 726

J. Huchra , M. Gorenstein , S. Kent , I. Shapiro , G. Smith , E. Horine , & R. Perley 1985, AJ, 90, 691

G. F. Lewis , J. Miralda-Escudé , D. C. Richardson , & J. Wambsganss 1993, MNRAS, 261, 647

E. Mediavilla , T. Mediavilla , J. A. Muñoz , O. Ariza , P. Lopez , C. Gonzalez-Morcillo , & J. Jimenez-Vicente 2011, ApJ, 741, 42

R. B. Metcalf , & M. Petkova 2014, MNRAS, 445 (2), 1942

A. C. Thompson , C. J. Fluke , D. G. Barnes , & B. R. Barsdell 2010, NewA, 15, 16

S. J. Walters , & L. K. Forbes 2011, MNRAS, 416, 3067

S. J. Walters , & L. K. Forbes 2014, MNRAS, 444, 2470

J. Wambsganss , & B. Paczynski 1994, AJ, 108, 1156

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Publications of the Astronomical Society of Australia
  • ISSN: 1323-3580
  • EISSN: 1448-6083
  • URL: /core/journals/publications-of-the-astronomical-society-of-australia
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords:

Metrics

Full text views

Total number of HTML views: 3
Total number of PDF views: 9 *
Loading metrics...

Abstract views

Total abstract views: 74 *
Loading metrics...

* Views captured on Cambridge Core between 19th January 2017 - 23rd May 2017. This data will be updated every 24 hours.