Results 151 to 160 of about 23,012 (280)

Self-interacting Dark Matter Interpretation of Crater II

open access: yesThe Astrophysical Journal Letters
The satellite galaxy Crater II of the Milky Way is extremely cold and exceptionally diffuse. These unusual properties are challenging to understand in the standard model of cold dark matter.
Xingyu Zhang   +3 more
doaj   +1 more source

A UNIVERSAL MASS PROFILE FOR DWARF SPHEROIDAL GALAXIES?

open access: yesThe Astrophysical Journal, 2009
Replacement provides corrections to values of half-light radii adopted for eight classical dSphs, including revised tables and figures (conclusions are unchanged).
Edward W. Olszewski   +5 more
openaire   +3 more sources

The Origin of High-velocity Stars Considering the Impact of the Large Magellanic Cloud

open access: yesThe Astronomical Journal
Utilizing astrometric parameters sourced from Gaia Data Release 3 and radial velocities obtained from various spectroscopic surveys, we identify 519 high-velocity stars (HiVels) with a total velocity in the Galactocentric rest frame greater than 70% of ...
Jiwei Liao   +7 more
doaj   +1 more source

Probing late-time annihilations of oscillating asymmetric dark matter via rotation curves of galaxies

open access: yesEuropean Physical Journal C: Particles and Fields
In this paper, we explore the Oscillating Asymmetric Dark Matter (OADM) model to address the core-cusp problem, aiming to resolve the discrepancy between the predictions of the $$\Lambda \textrm{CDM}$$ Λ CDM cosmological model and the observed dark ...
Júlia G. Mamprim   +4 more
doaj   +1 more source

Assessing the Association between the Globular Cluster NGC 4147 and the Sagittarius Dwarf Galaxy

open access: yesThe Astronomical Journal
The potential association of the globular cluster (GC) NGC 4147 with the Sagittarius (Sgr) dwarf spheroidal galaxy has been proposed due to their comparable locations and radial velocities. However, there are still debates about this connection.
Ying-Hua Zhang   +3 more
doaj   +1 more source

A dynamical study of the Sextans dwarf spheroidal galaxy [PDF]

open access: bronze, 1994
J. C. Hargreaves   +3 more
openalex   +1 more source

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