Nonminimally coupled dark matter in clusters of galaxies: a fully comprehensive analysis
[EN] In this study, we explore how a non-minimal coupling between dark matter and gravity can affect the behavior of dark matter in galaxy clusters. We have considered the case of a disformal coupling, which leads to a modification of the Poisson equation. Building on an earlier work, we expand the...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad de León |
| Repositorio: | BULERIA. Repositorio Institucional de la Universidad de León |
| OAI Identifier: | oai:buleria.unileon.es:10612/25061 |
| Acceso en línea: | https://link.springer.com/article/10.1140/epjc/s10052-025-13956-x https://hdl.handle.net/10612/25061 |
| Access Level: | acceso abierto |
| Palabra clave: | Astrofísica Física Matemáticas Materia Oscura Lente gravitacinoal gravedad Modificada 21 Astronomía y Astrofísica |
| Sumario: | [EN] In this study, we explore how a non-minimal coupling between dark matter and gravity can affect the behavior of dark matter in galaxy clusters. We have considered the case of a disformal coupling, which leads to a modification of the Poisson equation. Building on an earlier work, we expand the analysis considering all possible disformal coupling scenarios and employing various dark matter density profiles. In doing so, we aim to constrain the key parameter in our model, the characteristic coupling length. To achieve this, we analyze data from a combination of strong and weak lensing using three statistical approaches: a single cluster fitting procedure, a joint analysis, and one with stacked profiles. Our findings show that the coupling length is typically very small, thus being fully consistent with general relativity, although with an upper limit at which is of the order of 100 kpc. |
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