Results 111 to 120 of about 234,039 (316)
Dissipative dark matter and the rotation curves of dwarf galaxies [PDF]
, 2015 There is ample evidence from rotation curves that dark matter halos around disk galaxies have nontrivial dynamics. Of particular significance are: a) the cored dark matter profile of disk galaxies, b) correlations of the shape of rotation curves with baryonic properties, and c) Tully-Fisher relations.
arxiv +1 more source
, 2006 12 pages, 7 figures, to appear in the Proceedings of the Fifth International Conference on Dark Matter in Astro and Particle Physics, H.V. Klapdor-Kleingrothaus, R. Arnowitt (eds.)
openaire +3 more sources
Effects of Galactic Environment on Size and Dark Matter Content in Low-mass Galaxies
The Astrophysical JournalWe utilize the cosmological volume simulation FIREbox to investigate how a galaxy’s environment influences its size and dark matter content. Our study focuses on approximately 1200 galaxies (886 central and 332 satellite halos) in the low-mass regime ...
Francisco J. Mercado +10 more
doaj +1 more source
Leptonic new force and cosmic-ray boosted dark matter for the XENON1T excess
Physics Letters B, 2020 The recently reported excess in XENON1T is explained by new leptonic forces, which are free from gauge anomalies. We focus on two scenarios with and without dark matter. In Scenario #1, the gauge boson of gauged lepton number U(1)Le−Lj, j=μ or τ provides
Yongsoo Jho +3 more
doaj
Dark matter and gamma rays from the galactic halo [PDF]
, 2001 The nature of the dark matter in the halo of our Galaxy is still largely unknown. The microlensing events found so far towards the Large Magellanic Cloud suggest that at most about 20% of the halo dark matter is in the form of MACHOs (Massive Astrophysical Compact Halo Objects).
arxiv +1 more source
Advanced Engineering Materials, EarlyView.This manuscript presents advances in digital transformation within materials science and engineering, emphasizing the role of the MaterialDigital Initiative. By testing and applying concepts such as ontologies, knowledge graphs, and integrated workflows, it promotes semantic interoperability and data‐driven innovation. The article reviews collaborative
Bernd Bayerlein +44 more
wiley +1 more source
The structure of dark matter halos. Observation versus theory [PDF]
arXiv, 1997 The rotation curves of dark matter dominated dwarf galaxies are analysed. The observations show that dark matter halos represent a one-parameter family with self similar density profiles. The global halo parameters, like total mass and scale length are coupled by simple scaling relations. The inner halo regions resemble non-singular, isothermal spheres
arxiv
The Shape of Dark Matter Halos
, 1999 Techniques for inferring the radial and geometric form of dark matter halos and the results they have produced to date are reviewed. Dark halos appear to extend to at least ~50 kpc with total enclosed masses that rise linearly with radius R. Whether this behavior can be extrapolated to distances as large as 200 kpc and beyond is controversial; results ...
openaire +3 more sources
Microlensing and Halo Cold Dark Matter
Physical Review Letters, 1995 We discuss the implications of the more than 50 microlensing events seen by the EROS, MACHO, and OGLE collaborations for the composition of the halo of our galaxy. The event rates indicate that the halo mass fraction in MACHO's is less than 30\%, consistent with expectations for a universe whose primary component is cold dark matter.
Geza Gyuk +2 more
openaire +4 more sources
From Damage to Functionality: Remanufacturing of Thrust Roller Bearings by Tailored Forming
Advanced Engineering Materials, EarlyView.Herein, the wear and fatigue behavior of repaired bearing raceways with a new powder alloy is investigated using a FE8 test‐rig and an oscillating tribometer. The tests are compared with industrial manufactured bearings to evaluate the repair quality. The repair can extend the service life of the repaired bearing to that of a new bearing and improves ...
Felix Saure +3 more
wiley +1 more source