2019A&A...627A.143H


Query : 2019A&A...627A.143H

2019A&A...627A.143H - Astronomy and Astrophysics, volume 627A, 143-143 (2019/7-2)

Joint cluster reconstructions. Combing free-form lensing and X-rays.

HUBER K., TCHERNIN C., MERTEN J., HILBERT S. and BARTELMANN M.

Abstract (from CDS):

Context. Galaxy clusters provide a multitude of observational data across wavelengths, and their structure and morphology are of considerable interest in cosmology as well as astrophysics. Aims. We develop a framework that allows the combination of lensing and non-lensing observations in a free-form and mesh-free approach to infer the projected mass distribution of individual galaxy clusters. This method can be used to test common assumptions on the morphology of clusters in parametric models. Methods. We make use of the lensing reconstruction code SAWLENS2, and expand its capabilities by incorporating an estimate of the projected gravitational potential based on X-ray data that are deprojected using the local Richardson-Lucy method and used to infer the Newtonian potential of the cluster. We discuss how potentially arising numerical artefacts can be treated. Results. We demonstrate the feasibility of our method on a simplified mock Navarro-Frenk-White (NFW) halo and on a cluster from a realistic hydrodynamical simulation. We show how the combination of X-ray and weak lensing data can affect a free-form reconstruction, improving the accuracy in the central region in some cases by a factor of two.

Abstract Copyright: © ESO 2019

Journal keyword(s): methods: numerical - galaxies: clusters: general - gravitational lensing: weak - X-rays: galaxies: clusters

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 MCS J1206.2-0847 ClG 12 06 12.2 -08 48 02           ~ 246 0
2 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 690 1

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