Results 11 to 20 of about 70,657 (316)
Debye Entropic Force and Modified Newtonian Dynamics [PDF]
Communications in Theoretical Physics, 2011 Verlinde has suggested that the gravity has an entropic origin, and a gravitational system could be regarded as a thermodynamical system. It is well-known that the equipartition law of energy is invalid at very low temperature. Therefore, entropic force should be modified while the temperature of the holographic screen is very low. It is shown that the
Xin Li, Zhe Chang
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Gravitational lensing in modified Newtonian dynamics [PDF]
Monthly Notices of the Royal Astronomical Society, 2001 AbstractGravitational lensing is most often used as a tool to investigate the distribution of (dark) matter in the universe, but, if the mass distribution is known a priori, it becomes, at least in principle, a powerful probe of gravity itself. Lensing observations are a more powerful tool than dynamical measurements because they allow measurements of ...
Mortlock, DJ, Turner, EL
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Geometry of modified Newtonian dynamics [PDF]
Physical Review D, 2012 Modified Newtonian Dynamics is an empirical modification to Poisson's equation which has had success in accounting for the `gravitational field' $ $ in a variety of astrophysical systems. The field $ $ may be interpreted in terms of the weak field limit of a variety of spacetime geometries.
Constantinos Skordis, Tom Zlosnik
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A historical perspective on modified Newtonian dynamics [PDF]
Canadian Journal of Physics, 2015 I review the history and development of modified Newtonian dynamics (MOND) beginning with the phenomenological basis as it existed in the early 1980s. I consider Milgrom’s papers of 1983 introducing the idea and its consequences for galaxies and galaxy groups, as well as the initial reactions, both negative and positive.
Sanders, R. H.
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Modified Newtonian dynamics and non-relativistic ChSAS gravity
Physics Letters B, 2018 In the context of the non-relativistic theories, a generalization of the Chern–Weil-theorem allows us to show that extended Chern–Simons actions for gravity in d=4 invariant under some specific non-relativistic groups lead to modified Poisson equations ...
G. Rubio, P. Salgado
doaj +3 more sources
Vertical dynamics of disc galaxies in modified Newtonian dynamics [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 We investigate the possibility of discriminating between modified Newtonian dynamics (MOND) and Newtonian gravity with dark matter, by studying the vertical dynamics of disc galaxies. We consider models with the same circular velocity in the equatorial plane (purely baryonic discs in MOND and the same discs in Newtonian gravity embedded in spherical ...
NIPOTI, CARLO +3 more
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Testing modified Newtonian dynamics in the Milky Way [PDF]
Physical Review D, 2015 Modified Newtonian dynamics (MOND) is an empirical theory originally proposed to explain the rotation curves of spiral galaxies by modifying the gravitational acceleration, rather than by invoking dark matter. Here,we set constraints on MOND using an up-to-date compilation of kinematic tracers of the Milky Way and a comprehensive collection of ...
Iocco F., Pato M., Bertone G.
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Galactic kinematics with modified Newtonian dynamics [PDF]
Astronomy & Astrophysics, 2009 We look for observational signatures that could discriminate between Newtonian and modified Newtonian (MOND) dynamics in the Milky Way, in view of the advent of large astrometric and spectroscopic surveys. Indeed, a typical signature of MOND is an apparent disk of "phantom" dark matter, which is uniquely correlated with the visible disk-density ...
Bienaymé, Olivier +4 more
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Modified Newtonian Dynamics, an Introductory Review [PDF]
AIP Conference Proceedings, 2006 To Appear in the proceeding of the "First crisis in cosmology" conference, published in the American Institute of Physiscs' proceedings series, Vol. 822. (includes 13 pages and 12 figures)
Riccardo Scarpa, Riccardo Scarpa
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Galaxy merging in modified Newtonian dynamics [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2007 Abstract We present the results of N-body simulations of dissipationless galaxy merging in modified Newtonian dynamics (MOND). For comparison, we also studied Newtonian merging between galaxies embedded in dark matter haloes, with internal dynamics equivalent to the MOND systems.
Carlo Nipoti +2 more
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