Modified gravity in galaxy clusters: Joint analysis of Hydrostatics and Caustics
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arXiv
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| Format: | Preprint |
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2024
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| author | Butt, Minahil Adil Haridasu, Sandeep Boumechta, Yacer Benetti, Francesco Pizzuti, Lorenzo Baccigalupi, Carlo Lapi, Andrea |
| author_facet | Butt, Minahil Adil Haridasu, Sandeep Boumechta, Yacer Benetti, Francesco Pizzuti, Lorenzo Baccigalupi, Carlo Lapi, Andrea |
| contents | We present a comprehensive joint analysis of two distinct methodologies for measuring the mass of galaxy clusters: hydrostatic measurements and caustic techniques. We show that by including cluster-specific assumptions obtained from hydrostatic measurements in the caustic method, the potential mass bias between these approaches can be significantly reduced. Applying this approach to two well-observed massive galaxy clusters A2029 and A2142. We find no discernible mass bias, affirming the method's validity. We then extend the analysis to modified gravity models and draw a similar conclusion when applying our approach. Specifically, our implementation allows us to investigate Chameleon and Vainshtein screening mechanisms, tightening the posteriors and enhancing our understanding of these modified gravity scenarios. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_09134 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Modified gravity in galaxy clusters: Joint analysis of Hydrostatics and Caustics Butt, Minahil Adil Haridasu, Sandeep Boumechta, Yacer Benetti, Francesco Pizzuti, Lorenzo Baccigalupi, Carlo Lapi, Andrea Cosmology and Nongalactic Astrophysics We present a comprehensive joint analysis of two distinct methodologies for measuring the mass of galaxy clusters: hydrostatic measurements and caustic techniques. We show that by including cluster-specific assumptions obtained from hydrostatic measurements in the caustic method, the potential mass bias between these approaches can be significantly reduced. Applying this approach to two well-observed massive galaxy clusters A2029 and A2142. We find no discernible mass bias, affirming the method's validity. We then extend the analysis to modified gravity models and draw a similar conclusion when applying our approach. Specifically, our implementation allows us to investigate Chameleon and Vainshtein screening mechanisms, tightening the posteriors and enhancing our understanding of these modified gravity scenarios. |
| title | Modified gravity in galaxy clusters: Joint analysis of Hydrostatics and Caustics |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2412.09134 |