Results 51 to 60 of about 3,622,393 (232)

Probing the Nonlinear Density Wave Theory of Spiral Galaxies by Baryonic Tully–Fisher Relation

Universe
The baryonic mass–velocity relation provides an important test of different galaxy dynamics models such as Lambda–cold dark matter (ΛCDM) and alternatives like Modified Newtonian Dynamics (MOND).
Miroslava Vukcevic, Djordje Savic, Predrag Jovanović   +2 more
doaj   +1 more source

Environmental regulation of cloud and star formation in galactic bars

, 2015
The strong time-dependence of the dynamics of galactic bars yields a complex and rapidly evolving distribution of dense gas and star forming regions. Although bars mainly host regions void of any star formation activity, their extremities can gather the ...
Agertz, O., Athanassoula, E., Bournaud, F., Combes, F., Elmegreen, B., Emsellem, E., Kraljic, K., Motte, F., Renaud, F., Teyssier, R.   +9 more
core   +5 more sources

Dynamical Blueprints for Galaxies [PDF]

The Astrophysical Journal, 2008
54 pages, 20 ...
Widrow, Lawrence M., Pym, Brent, Dubinski, John   +2 more
openaire   +2 more sources

A machian model as potential alternative to dark matter halo thesis in galactic rotational velocity prediction

Frontiers in Astronomy and Space Sciences
A novel axially symmetric metric is proposed to solve the Einstein field equations. This provides an analytical solution within the matter in the equatorial plane for any galaxy density profile.
Stephan Walrand
doaj   +1 more source

Formation of Transitional cE/UCD Galaxies through Massive/Dwarf Disc Galaxy Mergers

Galaxies, 2023
The dynamics of the merger of a dwarf disc galaxy with a massive spiral galaxy of the Milky Way type were studied in detail. The remnant of such interaction after numerous crossings of the satellite through the disc of the main galaxy was a compact ...
Alexander V. Khoperskov, Sergey S. Khrapov, Danila S. Sirotin   +2 more
doaj   +1 more source

Gravitational Structure Formation, the Cosmological Problem and Statistical Physics

, 2005
Models of structure formation in the universe postulate that matter distributions observed today in galaxy catalogs arise, through a complex non-linear dynamics, by gravitational evolution from a very uniform initial state.
Labini, Francesco Sylos, Pietronero, Luciano   +1 more
core   +2 more sources

Testing the MOND paradigm of modified dynamics with galaxy-galaxy gravitational lensing. [PDF]

Physical Review Letters, 2013
The MOND paradigm of modified dynamics predicts that the asymptotic gravitational potential of an isolated, bounded (baryonic) mass, M, is ϕ(r)=(MGa0)1/2ln(r).
M. Milgrom
semanticscholar   +1 more source

Probing the Disk Kinematics of M31 with DESI

Edinburgh Student Journal of Science
M31’s stellar rotation curve and disk line-of-sight dispersion is presented using kinematic data from a novel DESI M31 survey in combination with similar datasets.
Struan Stevenson
doaj   +1 more source

Refracted Gravity Solutions from Small to Large Scales

Astronomy
If visible matter alone is present in the Universe, general relativity (GR) and its Newtonian weak field limit (WFL) cannot explain several pieces of evidence, from the largest to the smallest scales.
Valentina Cesare
doaj   +1 more source

Tests of Gravity from Imaging and Spectroscopic Surveys [PDF]

, 2009
Tests of gravity on large-scales in the universe can be made using both imaging and spectroscopic surveys. The former allow for measurements of weak lensing, galaxy clustering and cross-correlations such as the ISW effect.
A. J. S. Hamilton, Bhuvnesh Jain, Jacek Guzik, Masahiro Takada, N. Kaiser, S. M. Carroll   +5 more
core   +4 more sources