Star Stream Velocity Distributions in Cold Dark Matter and Warm Dark Matter Galactic Halos
The Astrophysical JournalThe dark matter subhalos orbiting in a galactic halo perturb the orbits of stars in thin stellar streams. Over time, the random velocities in the streams develop non-Gaussian wings.
Raymond G. Carlberg +3 more
doaj +2 more sources
Small-Scale Cosmology “Crisis” and Self-Interacting Right-Handed Neutrino Warm Dark Matter [PDF]
EPJ Web of Conferences, 2018 In the lecture, I first review the basic problems of the ΔCDM model at small (galactic) scales, also known as “small-scale Cosmology crisis”, namely discrepancies between theoretical simulations and observations.
Mavromatos Nick E.
doaj +2 more sources
Dark Matter freeze-in during warm inflation and the seesaw mechanism [PDF]
Journal of High Energy PhysicsA compelling way to address the inflationary period is via the warm inflation scenario, where the interaction of the inflaton field with other degrees of freedom affects its dynamics in such a way that slow-roll inflation is maintained by dissipative ...
Rayff de Souza +4 more
doaj +2 more sources
Mixed Warm Dark Matter Constraints using Milky Way Satellite Galaxy Counts [PDF]
Physical Review DWarm dark matter has been strongly constrained in recent years as the sole component of dark matter. However, a less-explored alternative is that dark matter consists of a mixture of warm and cold dark matter (MWDM).
Chin Yi Tan +2 more
openalex +2 more sources
Warm dark matter constraints from the JWST [PDF]
Monthly notices of the Royal Astronomical Society, 2023 Warm Dark Matter (WDM) particles with masses (∼ kilo electronvolt) offer an attractive solution to the small-scale issues faced by the Cold Dark Matter (CDM) paradigm. The delay of structure formation in WDM models and the associated dearth of low-mass
P. Dayal, S. Giri
semanticscholar +1 more source
Implications of the Stellar Mass Density of High-z Massive Galaxies from JWST on Warm Dark Matter [PDF]
Research in Astronomy and Astrophysics, 2023 A significant excess of the stellar mass density at high redshift has been discovered from the early data release of James Webb Space Telescope (JWST), and it may require a high star formation efficiency.
Hengjie Lin +3 more
semanticscholar +1 more source
thesan-hr: Galaxies in the Epoch of Reionization in warm dark matter, fuzzy dark matter and interacting dark matter [PDF]
Monthly notices of the Royal Astronomical Society, 2023 Using high-resolution cosmological radiation-hydrodynamic (RHD) simulations (thesan-hr), we explore the impact of alternative dark matter (altDM) models on galaxies during the Epoch of Reionization.
Xuejian Shen +10 more
semanticscholar +1 more source
Understanding the Formation of Galaxies with Warm Dark Matter [PDF]
Journal of Modern Physics, 2023 The formation of galaxies with warm dark matter is approximately adiabatic. The cold dark matter limit is singular and requires relaxation. In these lecture notes we develop, step-by-step, the physics of galaxies with warm dark matter, and their ...
B. Hoeneisen
semanticscholar +1 more source
Massive prompt cusps: A new signature of warm dark matter [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2023 Every dark matter halo and subhalo is expected to have a prompt ρ∝r−1.5 central density cusp, which is a relic of its condensation out of the smooth mass distribution of the early universe.
M. Sten Delos
semanticscholar +1 more source
Extending the unified subhalo model to warm dark matter [PDF]
Monthly notices of the Royal Astronomical Society, 2023 Using a set of high-resolution N-body simulations, we extend the unified distribution model of cold dark matter (CDM) subhaloes to the warm dark matter(WDM) case.
Feihong He +3 more
semanticscholar +1 more source