Results 61 to 70 of about 917,117 (194)
Implications of the Intriguing Constant Inner Mass Surface Density Observed in Dark Matter Halos
GalaxiesIt has long been known that the observed mass surface density of cored dark matter (DM) halos is approximately constant, independently of the galaxy mass (i.e., ρcrc≃constant, with ρc and rc being the central volume density and the radius of the core ...
Jorge Sánchez Almeida
doaj +1 more source
Advances in Astronomy, 2011 Dark matter is one of the greatest unsolved mysteries in cosmology at the present time. About 80% of the Universe's gravitating matter is nonluminous, and its nature and distribution are for the most part unknown.
Katherine Garrett, Gintaras Duda
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The Dark Matter at the End of the Galaxy
, 2010 Dark matter density profiles based upon Lambda-CDM cosmology motivate an ansatz velocity distribution function with fewer high velocity particles than the Maxwell-Boltzmann distribution or proposed variants.
A. S. Eddington +8 more
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Exothermic dark matter for XENON1T excess
Journal of High Energy Physics, 2021 Motivated by the recent excess in the electron recoil from XENON1T experiment, we consider the possibility of exothermic dark matter, which is composed of two states with mass splitting.
Hyun Min Lee
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Capture of dark matter by the Solar System. Simple estimates
, 2010 We consider the capture of galactic dark matter by the Solar System, due to the gravitational three-body interaction of the Sun, a planet, and a dark matter particle.
I. B. KHRIPLOVICH +3 more
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On the Spatial Distribution of Dark Matter Halos
The Astrophysical Journal, 1998 We study the spatial distribution of dark matter halos in the Universe in terms of their number density contrast, related to the underlying dark matter fluctuation via a non-local and non-linear bias random field. The description of the matter dynamics is simplified by adopting the `truncated' Zel'dovich approximation to obtain both analytical results ...
CATELAN P. +2 more
openaire +3 more sources
A closer look at dark matter production in exponential growth scenarios
Journal of High Energy PhysicsWe investigate a recently proposed non-thermal mechanism for dark matter production, in which a small initial dark matter (χ) number density undergoes exponential growth through scatterings with bath particles (ϕ) in the early universe (χϕ → χχ).
Disha Bhatia
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The Astrophysical Journal, 2022 Stellar streams from globular clusters (GCs) offer constraints on the nature of dark matter and have been used to explore the dark matter halo structure and substructure of our Galaxy. Detection of GC streams in other galaxies would broaden this endeavor
Sarah Pearson +7 more
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A Dense Dark Matter Core of the Subhalo in the Strong Lensing System JVAS B1938+666
The Astrophysical Journal LettersThe nature of dark matter remains unknown, motivating the study of fuzzy/wave dark matter (FDM/ ψ DM) and self-interacting dark matter (SIDM) as alternative frameworks to address small-scale discrepancies in halo profiles inferred from observations. This
Lei Lei +9 more
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An excursion set model for the distribution of dark matter and dark matter haloes [PDF]
, 1998 A model of the gravitationally evolved dark matter distribution, in the Eulerian space, is developed. It is a simple extension of the excursion set model that is commonly used to estimate the mass function of collapsed dark matter haloes.
Sheth, Ravi K.
core +4 more sources