Results 111 to 120 of about 695,053 (252)

GeV excess and phenomenological astrophysics modeling

, 2015
Predefined spatial templates to describe the background of $\gamma$-ray emission from astrophysical processes, like cosmic ray interactions, are used in previous searches for the $\gamma$-ray signatures of annihilating galactic dark matter.
Enßlin, Torsten, Huang, Xiaoyuan, Selig, Marco   +2 more
core   +1 more source

Figuring Out Gas and Galaxies in Enzo (FOGGIE). IX. The Angular Momentum Evolution of Milky Way–like Galaxies and Their Circumgalactic Gas

The Astrophysical Journal
We investigate the coevolution of the angular momentum of Milky Way–like galaxies, their circumgalactic gas, and their dark matter halos using zoom-in simulations from the Figuring Out Gas and Galaxies in Enzo suite.
Raymond C. Simons, Molly S. Peeples, Jason Tumlinson, Brian W. O’Shea, Cassandra Lochhaas, Anna C. Wright, Ayan Acharyya, Ramona Augustin, Kathleen A. Hamilton-Campos, Britton D. Smith, Nicolas Lehner, Jessica K. Werk, Yong Zheng   +12 more
doaj   +1 more source

Is Planckian Discreteness Observable in Cosmology?

Universe
A Planck scale inflationary era—in a quantum gravity theory predicting discreteness of quantum geometry at the fundamental scale—produces the scale-invariant spectrum of inhomogeneities with a very small tensor-to-scalar ratio of perturbations and a hot ...
Gabriel R. Bengochea, Gabriel León, Alejandro Perez   +2 more
doaj   +1 more source

WIMPless Dark Matter from Non-Abelian Hidden Sectors with Anomaly-Mediated Supersymmetry Breaking

, 2011
In anomaly-mediated supersymmetry breaking (AMSB) models, superpartner masses are proportional to couplings squared. Their hidden sectors therefore naturally contain WIMPless dark matter, particles whose thermal relic abundance is guaranteed to be of the
Feng, Jonathan L., Shadmi, Yael
core   +1 more source

Violent Relaxation of Indistinguishable Objects and Neutrino Hot Dark Matter in Clusters of Galaxies [PDF]

, 1996
Andreas Kull, R. A. Treumann, H. Böhringer   +2 more
openalex   +1 more source

Hydrostatic Equilibrium Constraints in X-COP Galaxy Clusters: Testing Hyperconical Modified Gravity in Hot-gas-dominated Regions

The Astrophysical Journal
Modified Newtonian dynamics (MOND) was originally proposed to model galaxy rotation curves without dark matter. However, MOND presents difficulties in explaining the radial acceleration relation observed in galaxy clusters, and moreover, it does not ...
Robert Monjo
doaj   +1 more source

First Structure Formation. II. Cosmic String plus Hot Dark Matter Models [PDF]

, 1998
Tom Abel, Albert Stebbins, Peter Anninos, Michael L. Norman   +3 more
openalex   +1 more source

Dark matter from hot big bang black holes [PDF]

, 2023
Avi Friedlander, Ningqiang Song, Aaron C. Vincent   +2 more
openalex   +1 more source

Constraints on massive neutrinos as hot dark matter

Nuclear Physics B - Proceedings Supplements, 1996
This article highlights three astronomical observations that can constrain the masses of neutrinos as hot dark matter: high-redshift damped Lyα systems, the cosmic microwave background anisotropy, and gravitational lenses. Theoretical predictions and current constraints are summarized.
openaire   +1 more source

Early structure formation with cold plus hot dark matter --- a success of strings plus inflation model [PDF]

, 1999
Richard A. Battye, João Magueijo, J. Weller   +2 more
openalex   +1 more source