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 | |
| Publication status | Published - Mar 1 2011 |
| Externally published | Yes |
Fingerprint
All Science Journal Classification (ASJC) codes
- Mathematical Physics
- Astronomy and Astrophysics
- Space and Planetary Science
Cite this
Analytic approach to perturbed Einstein ring with elliptical NFW lens model. / Habara, Yuta; Yamamoto, Kazuhiro.
In: International Journal of Modern Physics D, Vol. 20, No. 3, 01.03.2011, p. 371-400.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Analytic approach to perturbed Einstein ring with elliptical NFW lens model
AU - Habara, Yuta
AU - Yamamoto, Kazuhiro
PY - 2011/3/1
Y1 - 2011/3/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=79953107834&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79953107834&partnerID=8YFLogxK
U2 - 10.1142/S0218271811018834
DO - 10.1142/S0218271811018834
M3 - Article
AN - SCOPUS:79953107834
VL - 20
SP - 371
EP - 400
JO - International Journal of Modern Physics D
JF - International Journal of Modern Physics D
SN - 0218-2718
IS - 3
ER -