Light on Dark Matter: Gravitational Lensing by Galaxy Clusters
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| Format: | Artículo científico |
| Sprache: | en |
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Sociedade Brasileira de Física
2005
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| _version_ | 1876433538623995904 |
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| author | Laerte Sodré |
| author_facet | Laerte Sodré |
| contents | Light on Dark Matter: Gravitational Lensing by Galaxy Clusters Laerte Sodré Física, Astronomía y Matemáticas I discuss the use the weak gravitational lensing effect to study the mass distribution and dynamical state of asample of 24 X-ray luminous clusters of galaxies. By comparing the mass and light distributions of the clustersit is found that their mass centers, for the majority of the clusters, is consistent with the positions of opticalcenters. Some clusters present significant mass substructures which generally have optical counterparts. At leastin one cluster (Abell 1451), it is detected a mass substructure without an obvious luminous counterpart. Clusterswith intra-cluster gas colder than 8 keV show a good agreement between the different mass determinations, butclusters with gas hotter than 8 keV present weak lensing masses smaller than those inferred by the other methodsand therefore have been diagnosed to be out of equilibrium. 2005 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46435741 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4B Vol.35 |
| format | Artículo científico |
| id | redalyc_46435741 |
| institution | Redalyc |
| language | en |
| publishDate | 2005 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Light on Dark Matter: Gravitational Lensing by Galaxy Clusters Laerte Sodré Física, Astronomía y Matemáticas Light on Dark Matter: Gravitational Lensing by Galaxy Clusters Laerte Sodré Física, Astronomía y Matemáticas I discuss the use the weak gravitational lensing effect to study the mass distribution and dynamical state of asample of 24 X-ray luminous clusters of galaxies. By comparing the mass and light distributions of the clustersit is found that their mass centers, for the majority of the clusters, is consistent with the positions of opticalcenters. Some clusters present significant mass substructures which generally have optical counterparts. At leastin one cluster (Abell 1451), it is detected a mass substructure without an obvious luminous counterpart. Clusterswith intra-cluster gas colder than 8 keV show a good agreement between the different mass determinations, butclusters with gas hotter than 8 keV present weak lensing masses smaller than those inferred by the other methodsand therefore have been diagnosed to be out of equilibrium. 2005 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46435741 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4B Vol.35 |
| title | Light on Dark Matter: Gravitational Lensing by Galaxy Clusters |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46435741 |