منابع مشابه
Challenges for ΛCDM and MOND
The Universe on large scales is well described by the ΛCDM cosmological model. There however remain some heavy clouds on our global understanding, especially on galaxy scales, which we review here. While some of these clouds might perhaps disappear through small compensatory adjustments of the model, such as changing the mass of the dark matter particles or accounting better for baryonic physic...
متن کاملMond and Cosmology
I review various ideas on MOND cosmology and structure formation beginning with non-relativistic models in analogy with Newtonian cosmology. I discuss relativistic MOND cosmology in the context of Bekenstein’s theory and propose an alternative biscalar effective theory of MOND in which the acceleration parameter, a0 is identified with the cosmic time derivative of a matter coupling scalar field...
متن کاملΛCDM: Triumphs, Puzzles and Remedies
The consistency level of ΛCDM with geometrical data probes has been increasing with time during the last decade. Despite of these successes, there are some puzzling conflicts between ΛCDM predictions and dynamical data probes (bulk flows, alignment and magnitude of low CMB multipoles, alignment of quasar optical polarization vectors, cluster halo profiles). Most of these puzzles are related to ...
متن کاملLarge Einstein Radii: A Problem for ΛCDM
The Einstein radius of a cluster provides a relatively model-independent measure of the mass density of a cluster within a projected radius of ∼ 150 kpc, large enough to be relatively unaffected by gas physics. We show that the observed Einstein radii of three well-studied massive clusters, for which reliable virial masses are measured, lie well beyond the predicted distribution of Einstein rad...
متن کاملThe MOND Fundamental Plane
Modified Newtonian dynamics (MOND) has been shown to be able to fit spiral galaxy rotation curves as well as giving a theoretical foundation for empirically determined scaling relations, such as the Tully-Fisher law, without the need for a dark matter halo. As a complementary analysis, one should investigate whether MOND can also reproduce the dynamics of early-type galaxies (ETGs) without dark...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2013
ISSN: 1742-6588,1742-6596
DOI: 10.1088/1742-6596/437/1/012001