NGC 1052-DF2 and modified gravity (MOG) without dark matter
نویسندگان
چکیده
منابع مشابه
Modified Gravity: Cosmology without dark matter or a cosmological constant
We explore the cosmological consequences of Modified Gravity (MOG), and find that it provides, using a minimal number of parameters, good fits to data, including CMB temperature anisotropy, galaxy mass power spectrum, and supernova luminosity-distance observations. The MOG cosmology is flat and predicts an age of the universe of ∼ 34 billion years.
متن کاملModified Gravity: Cosmology without dark matter or Einstein’s cosmological constant
We explore the cosmological consequences of Modified Gravity (MOG), and find that it provides, using a minimal number of parameters, good fits to data, including CMB temperature anisotropy, galaxy power spectrum, and supernova luminosity-distance observations. The MOG cosmology predicts a flat universe with an accelerating expansion and an age of ∼14 billion years.
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Dynamical mass discrepancies in galaxies have two possible explanations: the existence of large amounts of dark matter or the breakdown of Newtonian gravity. True dark matter halos of galaxies could differ in several respects from apparent halos inferred from misinterpreted modified gravity, and we discuss two observational tests to probe these differences. Modified gravity gives generic, geome...
متن کاملGravitational Lensing in Modified Gravity and the Lensing of Merging Clusters without Dark Matter
Gravitational lensing in a modified gravity (MOG) is derived and shown to describe lensing without postulating dark matter. The recent data for merging clusters identified with the interacting cluster 1E0657-56 is shown to be consistent with a weak lensing construction based on MOG without exotic dark matter. e-mail: [email protected]
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MOND, invented by Milgrom, is a phenomenological scheme whose basic premise is that the visible matter distribution in a galaxy or cluster of galaxies alone determines its dynamics. MOND fits many observations surprisingly well. Could it be that there is no dark matter in these systems and we witness rather a violation of Newton’s universal gravity law ? If so, Einstein’s general relativity wou...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society: Letters
سال: 2018
ISSN: 1745-3925,1745-3933
DOI: 10.1093/mnrasl/sly176