Results 81 to 90 of about 12,786 (266)
Zinc abundances in the Sculptor dwarf spheroidal galaxy, [PDF]
Astronomy & Astrophysics, 2017 From ESO VLT/FLAMES/GIRAFFE spectra, abundance measurements of Zn have been made in ≈100 individual red giant branch (RGB) stars in the Sculptor dwarf spheroidal galaxy. This is the largest sample of individual Zn abundance measurements within a stellar system beyond the Milky Way.
Skuladottir, A. +4 more
openaire +3 more sources
Maximally self-interacting dark matter: models and predictions
Journal of High Energy Physics, 2020 We study self-interacting dark matter (SIDM) scenarios, where the s-wave self-scattering cross section almost saturates the Unitarity bound. Such self-scattering cross sections are singly parameterized by the dark matter mass, and are featured by strong ...
Ayuki Kamada +2 more
doaj +1 more source
The Astrophysical Journal, 2023 Stellar streams in the Galactic halo are useful probes of the assembly of galaxies like the Milky Way. Many tidal stellar streams that have been found in recent years are accompanied by a known progenitor globular cluster or dwarf galaxy.
Keith Hawkins +10 more
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Dark matter searches in dwarf spheroidal galaxies with the Cherenkov Telescope Array [PDF]
, 2023 Francesco Gabriele Saturni +3 more
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Tracing satellite planes in the Sculptor group
Astronomy & AstrophysicsContext. Although substantial progress has been made in reconciling lambda cold dark matter (ΛCDM) simulations with the observed abundance and distribution of satellite galaxies, important tensions persist.
Martínez-Delgado David +7 more
doaj +1 more source
THE HOT DARK MATTER MODEL: FURTHER INVESTIGATION
Odessa Astronomical Publications, 2020 e outer region with the dominant hot dark matter (the parabolic orbit of the test particle). It was assumed that the hot dark matter consists of hypothetical Planck neutrinos arising in the decay of the protons at the Planck scale.
D. L. Khokhlov
doaj +1 more source
Dwarf Spheroidal Galaxies and Globular Clusters [PDF]
Symposium - International Astronomical Union, 1988 Recent observational results for dwarf spheroidal galaxies are reviewed and discussed. In particular, the differences in stellar populations between dwarf spheroidal galaxies and globular clusters are highlighted. It seems most probable that the origin and evolution of dwarf spheroidal galaxies was very different from that of globular clusters.
openaire +1 more source
Dark Matter Gamma-ray searches in Galaxy Clusters: Status and prospects [PDF]
EPJ Web of ConferencesGalaxy clusters are the largest structures in the Universe, being dark matter (DM) dominated objects. For DM decay, they yield the highest expected fluxes with respect to other prime targets.
Pérez-Romero Judit
doaj +1 more source
Molecular Gas Properties in Young Stellar Clusters with a Suppressed Star Cluster Wind
The Astrophysical Journal Letters, 2023 In compact and dense star-forming clouds a global star cluster wind could be suppressed. In this case stellar feedback is unable to expel the leftover gas from the cluster. Young massive stars remain embedded in a dense residual gas and stir it by moving
Sergiy Silich +3 more
doaj +1 more source
Searches for HI in the Outer Parts of Four Dwarf Spheroidal Galaxies
, 1999 Previous searches for atomic gas in our Galaxy's dwarf spheroidal companions have not been complete enough to settle the question of whether or not these galaxies have HI, especially in their outer parts.
Young, L. M.
core +2 more sources