Results 31 to 40 of about 4,727,160 (263)

A historical perspective on modified Newtonian dynamics [PDF]

open access: yesCanadian 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.
openaire   +3 more sources

Debye Entropic Force and Modified Newtonian Dynamics [PDF]

open access: yesCommunications 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
Li, Xin, Chang, Zhe
openaire   +2 more sources

Modified Newtonian Dynamics: A Falsification of Cold Dark Matter

open access: yesAdvances in Astronomy, 2009
The only viable alternative to dark matter is one in which Newtonian dynamics or gravity breaks down in the limit of low accelerations, as in modified Newtonian dynamics (MONDs).
R. H. Sanders
doaj   +1 more source

The total mass of the early-type galaxy NGC 4649 (M60) [PDF]

open access: yesSerbian Astronomical Journal, 2008
In this paper the problem of the total mass and the total mass-to-light ratio of the early-type galaxy NGC 4649 (M60) is analyzed. Use is made of two independent techniques: the X-ray methodology which is based on the temperature of the X-ray halo of NGC
Samurović S., Ćirković M.M.
doaj   +3 more sources

Loss of Mass and Stability of Galaxies in Modified Newtonian Dynamics [PDF]

open access: yesThe Astrophysical Journal, 2007
The self-binding energy and stability of a galaxy in MOND-based gravity are curiously decreasing functions of its center-of-mass acceleration (of the order of 10-12 to 10-10 m s-2) toward neighboring mass concentrations. A tentative indication of this breaking of the strong equivalence principle in field galaxies is the RAVE-observed escape speed in ...
Wu, Xufen   +7 more
openaire   +4 more sources

Modified gravity revealed along geodesic tracks

open access: yesEuropean Physical Journal C: Particles and Fields, 2018
The study of the dynamics of a two-body system in modified gravity constitutes a more complex problem than in Newtonian gravity. Numerical methods are typically needed to solve the equations of geodesics.
Mariafelicia De Laurentis   +2 more
doaj   +1 more source

Clusters of galaxies with modified Newtonian dynamics [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2003
X-ray emitting clusters of galaxies are considered in the context of modified Newtonian dynamics (MOND). I show that self-gravitating isothermal gas spheres are not good representations of rich clusters with respect to the radial gas density distribution as indicated by the X-ray surface brightness.
openaire   +2 more sources

Numerical simulations of Modified Newtonian Dynamics [PDF]

open access: yesJournal of Physics: Conference Series, 2016
The ΛCDM standard cosmological model is strongly supported by multiple lines of evidence, particularly from observations at large scales such as the CMB and large scale structure. There are some indications, however, of problems at smaller scales. An alternative to the CDM approach is to modify the gravitational force, as exemplified by the MOdified ...
G N Candlish, R Smith, M Fellhauer
openaire   +1 more source

The modified Newtonian dynamics Fundamental Plane [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2011
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
CARDONE, VINCENZO FABRIZIO   +4 more
openaire   +4 more sources

Piezo-Plunger Jetting Technology: An Experimental Study on Jetting Characteristics of Filled Epoxy Polymers

open access: yesFluids, 2019
The droplet formation of Newtonian fluids and suspensions modified by spherical, non-colloidal particles has attracted much interest in practical and theoretical research.
Alexander Kurz   +2 more
doaj   +1 more source

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