Analytic approach to perturbed Einstein ring with elliptical NFW lens model

Yuta Habara; Kazuhiro Yamamoto

doi:10.1142/S0218271811018834

Analytic approach to perturbed Einstein ring with elliptical NFW lens model

Yuta Habara, Kazuhiro Yamamoto

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

We investigate the validity of the approximate method to describe a strong gravitational lensing which was extended by Alard on the basis of a perturbative approach to an Einstein ring. Adopting an elliptical NavarroFrenkWhite (NFW) lens model, we demonstrate how the approximate method works, focusing on the shape of the image, the magnification, caustics, and the critical line. Simplicity of the approximate method enables us to investigate the lensing phenomena in an analytic way. We derive simple approximate formulas which characterize a lens system near the Einstein ring.

Original language	English
Pages (from-to)	371-400
Number of pages	30
Journal	International Journal of Modern Physics D
Volume	20
Issue number	3
DOIs	https://doi.org/10.1142/S0218271811018834
Publication status	Published - Mar 2011
Externally published	Yes

All Science Journal Classification (ASJC) codes

Mathematical Physics
Astronomy and Astrophysics
Space and Planetary Science

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10.1142/S0218271811018834

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