Hostname: page-component-cd9895bd7-p9bg8 Total loading time: 0 Render date: 2024-12-26T18:01:04.140Z Has data issue: false hasContentIssue false
  • English
  • Français

When Darwin Met Einstein: Gravitational Lens Inversion with Genetic Algorithms

Published online by Cambridge University Press:  05 March 2013

Brendon J. Brewer  and
Geraint F. Lewis
Brendon J. Brewer
Affiliation:
Institute of Astronomy, School of Physics, University of Sydney, Sydney NSW 2006, Australia
Geraint F. Lewis*
Affiliation:
Institute of Astronomy, School of Physics, University of Sydney, Sydney NSW 2006, Australia
*
BCorresponding author. Email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Gravitational lensing can magnify a distant source, revealing structural detail which is normally unresolvable. Recovering this detail through an inversion of the influence of gravitational lensing, however, requires optimisation of not only lens parameters, but also of the surface brightness distribution of the source. This paper outlines a new approach to this inversion, utilising genetic algorithms to reconstruct the source profile. In this initial study, the effects of image degradation due to instrumental and atmospheric effects are neglected and it is assumed that the lens model is accurately known, but the genetic algorithm approach can be incorporated into more general optimisation techniques, allowing the optimisation of both the parameters for a lensing model and the surface brightness of the source.

Keywords

gravitational lensingmethods: numerical
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 22 , Issue 2 , 2005 , pp. 128 - 135
Copyright
Copyright © Astronomical Society of Australia 2005

References

Bailer-Jones, C. A. L. 2004, A&A, 419, 385 Google Scholar
Bobinger, A. 2000, A&A, 357, 1170 Google Scholar
Charbonneau, P. 1995, ApJS, 101, 309 CrossRefGoogle Scholar
Cohen, J., & Stewart, I. 2000, The Collapse of Chaos (London: Penguin Books)Google Scholar
Darwin, C. 1859, Origin of the Species (London: Penguin Books)Google Scholar
Dye, S., & Warren, S. J. 2005, ApJ, submitted (astro-ph/0411452)Google Scholar
Ellithorpe, J. D., Kochanek, C. S., & Hewitt, J. N. 1996, ApJ, 464, 556 CrossRefGoogle Scholar
Fletcher, S. T., Chaplin, W. J., & Elsworth, Y. 2003, MNRAS, 346, 825 CrossRefGoogle Scholar
Gómez de Castro, A. I., & Yáñez, J. 2003, A&A, 403, 357 Google Scholar
Hakala, P. J. 1995, A&A, 296, 164 Google Scholar
Kent, S. M., & Falco, E. E. 1988, AJ, 96, 1570 CrossRefGoogle Scholar
Kochanek, C. S. 1991, ApJ, 373, 354 CrossRefGoogle Scholar
Kochanek, C. S., & Narayan, R. 1992, ApJ, 401, 461 Google Scholar
Kochanek, C. S., Schneider, P., & Wambsganss, J. 2004, in Part 2 of Gravitational Lensing: Strong, Weak & Micro, Proceedings of the 33rd Saas-Fee Advanced Course, eds. G. Meylan, P. Jetzer, & P. North (Berlin: Springer-Verlag) (astro-ph/0407232)Google Scholar
Kochanek, C. S., Blandford, R. D., Lawrence, C. R., & Narayan, R. 1989, MNRAS, 238, 43 CrossRefGoogle Scholar
Larsen, J. A., & Humphreys, R. M. 2003, AJ, 125, 1958 CrossRefGoogle Scholar
Levy, S. 1993, Artificial Life: A Report from the Frontier Where Computers Meet Biology (New York: Vintage Books)Google Scholar
Offer, A. R., & Bland-Hawthorn, J. 1998, MNRAS, 299, 176 CrossRefGoogle Scholar
Portegies Zwart, S. F., & Totani, T. 2001, MNRAS, 328, 951 CrossRefGoogle Scholar
Press, W. H., Teukolsky, S. A., Vetterling, W. T., & Flannery, B. P. 1992, Numerical Recipes (Cambridge: Cambridge University Press)Google Scholar
Schneider, D. P., Turner, E. L., Gunn, J. E., Hewitt, J. N., Schmidt, M., & Lawrence, C. R. 1988, AJ, 95, 1619 CrossRefGoogle Scholar
Wallington, S., Kochanek, C. S., & Narayan, R. 1996, ApJ, 465, 64 CrossRefGoogle Scholar
Wambsganss, J. 1998, Living Reviews in Relativity, 1, 12 CrossRefGoogle Scholar
Warren, S. J., & Dye, S. 2003, ApJ, 590, 673 CrossRefGoogle Scholar
Wayth, R. B., Warren, S. J., Lewis, G. F., & Hewett, P. C. 2005, MNRAS, submitted (astro-ph/0410253)Google Scholar
Wucknitz, O. 2004, MNRAS, 349, 1 CrossRefGoogle Scholar