Results 181 to 190 of about 120,847 (208)

Ecological study on alien Amaranthus spinosus L. in the Egyptian Nile Valley. [PDF]

Sci Rep
Ayed FA, Ahmed DAE.
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Distribution of Dark Matter in Galaxies

1989
The 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

A Simple Model for the Distribution of Dark Matter

The Physics Teacher, 2018
In recent times, the subject of dark matter has engaged the public thanks to reports in popular scientific journals and newspapers. In a first course in physics, we frequently encounter questions regarding reasons for belief in dark matter. Related questions regarding the composition and density of dark matter are also raised.
Lakshya Kaura, Akshat Mallya, Vijay A. Singh   +2 more
openaire   +1 more source

Dark matter-systematics of its distribution

Journal of Astrophysics and Astronomy, 1986
The 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

Cellular Distribution of the Universe and Dark Matter

1991
The medium-scale inhomogeneities in the distribution of structures in the Universe can be explained within a massive “inos” dark matter model. In this environment a cell-fractal distribution arises, giving at present time a general structure of fractal cells randomly distributed in space.
D. Calzetti, M. Giavalisco, R. Ruffini
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Dark matter annihilation to neutrinos

Reviews of Modern Physics, 2021
CARLOS A Arguelles, Ali Kheirandish, Aaron C Vincent   +2 more
exaly  

A quantum enhanced search for dark matter axions

Nature, 2021
K M Backes, D A Palken, S Al Kenany
exaly  

The Distribution of Galaxies Versus Dark Matter

1986
The 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

Direct limits for scalar field dark matter from a gravitational-wave detector

Nature, 2021
Sander M Vermeulen, H Grote, Vivien Raymond   +2 more
exaly  

Cosmological constraints on dark matter interactions with ordinary matter

Physics Reports, 2022
Manuel A Buen-Abad, Rouven Essig, David Mckeen   +2 more
exaly