Joseph F V Allingham
A full reconstruction of two galaxy clusters intra-cluster medium with strong gravitational lensing
Allingham, Joseph F V; Bœhm, Céline; Eckert, Dominique; Jauzac, Mathilde; Lagattuta, David; Mahler, Guillaume; Hilton, Matt; Lewis, Geraint F; Ettori, Stefano
Authors
Céline Bœhm
Dominique Eckert
Professor Mathilde Jauzac mathilde.jauzac@durham.ac.uk
Professor
Dr David Lagattuta david.j.lagattuta@durham.ac.uk
Post Doctoral Research Associate
Dr Guillaume Mahler guillaume.mahler@durham.ac.uk
Academic Visitor
Matt Hilton
Geraint F Lewis
Stefano Ettori
Abstract
Whilst X-rays and Sunyaev–Zel’dovich observations allow to study the properties of the intra-cluster medium (ICM) of galaxy clusters, their gravitational potential may be constrained using strong gravitational lensing. Although being physically related, these two components are often described with different physical models. Here, we present a unified technique to derive the ICM properties from strong lensing for clusters in hydrostatic equilibrium. In order to derive this model, we present a new universal and self-similar polytropic temperature profile, which we fit using the X-COP sample of clusters. We subsequently derive an analytical model for the electron density, which we apply to strong lensing clusters MACS J0242.5-2132 and MACS J0949.8+1708. We confront the inferred ICM reconstructions to XMM-Newton and ACT observations. We contrast our analytical electron density reconstructions with the best canonical β-model. The ICM reconstructions obtained prove to be compatible with observations. However they appear to be very sensitive to various dark matter halo parameters constrained through strong lensing (such as the core radius), and to the halo scale radius (fixed in the lensing optimizations). With respect to the important baryonic effects, we make the sensitivity on the scale radius of the reconstruction an asset, and use the inferred potential to constrain the dark matter density profile using ICM observations. The technique here developed should allow to take a new, and more holistic path to constrain the content of galaxy clusters.
Citation
Allingham, J. F. V., Bœhm, C., Eckert, D., Jauzac, M., Lagattuta, D., Mahler, G., …Ettori, S. (2024). A full reconstruction of two galaxy clusters intra-cluster medium with strong gravitational lensing. Monthly Notices of the Royal Astronomical Society, 528(2), 1711-1736. https://doi.org/10.1093/mnras/stae107
Journal Article Type | Article |
---|---|
Acceptance Date | Jan 8, 2024 |
Online Publication Date | Jan 11, 2024 |
Publication Date | 2024-02 |
Deposit Date | Mar 21, 2024 |
Publicly Available Date | Mar 21, 2024 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 528 |
Issue | 2 |
Pages | 1711-1736 |
DOI | https://doi.org/10.1093/mnras/stae107 |
Public URL | https://durham-repository.worktribe.com/output/2335257 |
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Copyright Statement
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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