Skip to Main content Skip to Navigation
New interface
Journal articles

Reconstructing the cosmic Horseshoe gravitational lens using the singular perturbative approach.

Abstract : The reconstruction of the cosmic horseshoe gravitational lens using the perturbative method reveals the presence of significant third-order terms. The presence of these higher order terms is apparent in the numerical expansion of the perturbative fields in Fourier series. The expansion of the fields at order 2 produces a higher value of the chi-square. Expanding at order 3 provides a very significant improvement, while order 4 does not bring a significant improvement over order 3. The presence of the order 3 terms is not a consequence of limiting the perturbative expansion to the first order. The amplitude and signs of the third-order terms are recovered by including the contribution of the other group members. This analysis demonstrates that the fine details of the potential of the lens could be recovered independently of any initial assumptions by using the perturbative approach.
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03747472
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Monday, August 8, 2022 - 1:43:30 PM
Last modification on : Thursday, November 24, 2022 - 5:02:58 PM
Long-term archiving on: : Wednesday, November 9, 2022 - 6:26:49 PM

File

stx085.pdf
Publisher files allowed on an open archive

Identifiers

Citation

C. Alard. Reconstructing the cosmic Horseshoe gravitational lens using the singular perturbative approach.. Monthly Notices of the Royal Astronomical Society, 2017, 467, pp.1997-2008. ⟨10.1093/mnras/stx085⟩. ⟨insu-03747472⟩

Share

Metrics

Record views

3

Files downloads

4