Weak Lensing of Galaxy Clusters in Modified Newtonian Dynamics

DOI DOI 被引用文献1件 オープンアクセス

書誌事項

公開日
2007-12-10
DOI
  • 10.1086/522564
  • 10.48550/arxiv.astro-ph/0701365
公開者
American Astronomical Society

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説明

We study weak gravitational lensing of galaxy clusters in terms of the MOND (MOdified Newtonian Dynamics) theory. We calculate shears and convergences of background galaxies for three clusters (A1689, CL0024+1654, CL1358+6245) and the mean profile of 42 SDSS (Sloan Digital Sky Survey) clusters and compare them with observational data. The mass profile is modeled as a sum of X-ray gas, galaxies and dark halo. For the shear as a function of the angular radius, MOND predicts a shallower slope than the data irrespective of the critical acceleration parameter $g_0$. The dark halo is necessary to explain the data for any $g_0$ and for three interpolation functions. If the dark halo is composed of massive neutrinos, its mass should be heavier than 2 eV. However the constraint still depends on the dark halo model and there are systematic uncertainties, and hence the more careful study is necessary to put a stringent constraint.

12 pages, 7 figures, references added, minor changes, accepted for publication in ApJ

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