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A new step forward in realistic cluster lens mass modelling: analysis of Hubble Frontier Field Cluster Abell S1063 from joint lensing, X-ray, and galaxy kinematics data

Beauchesne, Benjamin; Clément, Benjamin; Hibon, Pascale; Limousin, Marceau; Eckert, Dominique; Kneib, Jean-Paul; Richard, Johan; Natarajan, Priyamvada; Jauzac, Mathilde; Montes, Mireia; Mahler, Guillaume; Claeyssens , Adélaïde; Jeanneau, Alexandre; Koekemoer, Anton M ; Lagattuta, David; Pagul, Amanda; Sánchez, Javier

A new step forward in realistic cluster lens mass modelling: analysis of Hubble Frontier Field Cluster Abell S1063 from joint lensing, X-ray, and galaxy kinematics data Thumbnail


Authors

Benjamin Beauchesne

Benjamin Clément

Pascale Hibon

Marceau Limousin

Dominique Eckert

Jean-Paul Kneib

Johan Richard

Priyamvada Natarajan

Mireia Montes

Adélaïde Claeyssens

Alexandre Jeanneau

Anton M Koekemoer

Amanda Pagul

Javier Sánchez



Abstract

We present a new method to simultaneously and self-consistently model the mass distribution of galaxy clusters that combines constraints from strong lensing features, X-ray emission, and galaxy kinematics measurements. We are able to successfully decompose clusters into their collisionless and collisional mass components thanks to the X-ray surface brightness, as well as use the dynamics of cluster members, to obtain more accurate masses exploiting the fundamental plane of elliptical galaxies. Knowledge from all observables is included through a consistent Bayesian approach in the likelihood or in physically motivated priors. We apply this method to the galaxy cluster Abell S1063 and produce a mass model that we publicly release with this paper. The resulting mass distribution presents different ellipticities for the intra-cluster gas and the other large-scale mass components as well as deviation from elliptical symmetry in the main halo. We assess the ability of our method to recover the masses of the different elements of the cluster using a mock cluster based on a simplified version of our Abell S1063 model. Thanks to the wealth of mutliwavelength information provided by the mass model and the detected X-ray emission, we also found evidence for an ongoing merger event with gas sloshing from a smaller infalling structure into the main cluster. In agreement with previous findings, the total mass, gas profile, and gas mass fraction are all consistent with small deviations from the hydrostatic equilibrium. This new mass model for Abell S1063 is publicly available, as the LENSTOOL extension used to construct it.

Citation

Beauchesne, B., Clément, B., Hibon, P., Limousin, M., Eckert, D., Kneib, J., …Sánchez, J. (2024). A new step forward in realistic cluster lens mass modelling: analysis of Hubble Frontier Field Cluster Abell S1063 from joint lensing, X-ray, and galaxy kinematics data. Monthly Notices of the Royal Astronomical Society, 527(2), 3246–3275. https://doi.org/10.1093/mnras/stad3308

Journal Article Type Article
Acceptance Date Oct 23, 2023
Online Publication Date Oct 30, 2023
Publication Date 2024-01
Deposit Date Jan 31, 2024
Publicly Available Date Jan 31, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 527
Issue 2
Pages 3246–3275
DOI https://doi.org/10.1093/mnras/stad3308
Public URL https://durham-repository.worktribe.com/output/2188324
Publisher URL https://doi.org/10.1093/mnras/stad3308

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Licence
http://creativecommons.org/licenses/by/4.0/

Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
© 2023 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium,
provided the original work is properly cited.




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