Joint cluster reconstructions - combing free-form lensing and X-rays
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.<i>Aims<i/>. We develop a framework that allows the combination of lensing and non-lensing observations in a...
Guardado en:
| Autores principales: | , , , , |
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| Formato: | Article (Journal) |
| Lenguaje: | inglés |
| Publicado: |
15 July 2019
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| In: |
Astronomy and astrophysics
Year: 2019, Volumen: 627 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/201834928 |
| Acceso en línea: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1051/0004-6361/201834928 Verlag, lizenzpflichtig, Volltext: https://www.aanda.org/articles/aa/abs/2019/07/aa34928-18/aa34928-18.html 
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| Notas de Autor: | Korbinian Huber, Céline Tchernin, Julian Merten, Stefan Hilbert, and Matthias Bartelmann |
| Sumario: | 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.<i>Aims<i/>. 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.<i>Methods<i/>. 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.<i>Results<i/>. 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. |
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| Notas: | Gesehen am 28.04.2020 |
| Descripción Física: | Online Resource |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/201834928 |