Results 311 to 320 of about 917,675 (340)
Some of the next articles are maybe not open access.
Dark matter-systematics of its distribution
Journal of Astrophysics and Astronomy, 1986The dynamical masses of dwarf-spheroidals, spiral and elliptical galaxies, dwarf irregular binaries, groups of galaxies and clusters are shown to lie in a band about the M ∼ ρR3line. The value of ρ is approximately the same as that estimated for unseen matter in the solar neighbourhood.
R. Cowsik, M. Vasanthi
openaire +1 more source
The dark matter distribution of NGC 5921
Indian Journal of Physics, 2017We used the neutral atomic hydrogen data of the Very Large Array for the spiral galaxy NGC 5921 with z = 0.0045 at the distance of 22.4 Mpc, to investigate the nature of dark matter. The investigation was based on two theories, namely, dark matter and Modified Newtonian Dynamics (MOND). We presented the kinematic analysis of the rotation curve with two
Ali, Israa Abdulqasim Mohammed +2 more
openaire +2 more sources
Distribution of Dark Matter in Galaxies
1989The current evidence for dark matter in galaxies is briefly reviewed. While for ellipticals the evidence for dark halos is not yet overwhelming, for disk galaxies we can already start to constrain the distribution of the dark matter. The global M/L-ratios out to the largest radii where the tracers of the mass are still reliable are below the values of ...
openaire +1 more source
Model-Independent Estimates of Dark Matter Distributions
Journal of the American Statistical Association, 2008A new nonparametric method is described to estimate the distribution of mass within spherical galaxies. The problem of estimating the mass, M(r), within radius r is converted into a problem of estimating a regression function nonparametrically, subject to shape restrictions.
Wang, Xiao +4 more
openaire +2 more sources
Dark Matter Distribution from Gravitational Entropy Evolution
2002A recently introduced measure of the gravitational entropy evolution due to formation of structure in the universe provides a number of scaling laws, which generate a sequence of discrete inhomogeneities ranging from the particle physics scale to clusters and superclusters of galaxies.
openaire +1 more source
Weyl, Dirac and high-fold chiral fermions in topological quantum matter
Nature Reviews Materials, 2021M Zahid Hasan +2 more
exaly
The Distribution of Galaxies Versus Dark Matter
1986The assumption that galaxies trace mass enables us to estimate Ω and to interpret the large-scale structure based on observations of galaxies. However, it would be astonishing if galaxy formation was not affected by environmental effects (e.g. Dressier 1980), resulting in biased galaxy formation.
openaire +1 more source