Results 171 to 180 of about 170,345 (283)

A UNIVERSAL MASS PROFILE FOR DWARF SPHEROIDAL GALAXIES?

The 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, N. Wyn Evans, Gerard Gilmore, Jorge Peñarrubia, Mario Mateo, Matthew G. Walker   +5 more
openaire   +3 more sources

Self-interacting Dark Matter Interpretation of Crater II

The 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, Hai-Bo Yu, Daneng Yang, Haipeng An   +3 more
doaj   +1 more source

Estimating masses of dwarf spheroidal galaxies [PDF]

arXiv, 2014
Precise measurements of mass in dark matter dominated dwarf spheroidal galaxies are of great importance for testing the theories of structure formation. We use $N$-body simulations of the tidal evolution of a dwarf galaxy orbiting the Milky Way to generate mock kinematical data sets and use them to test the reliability of a simple mass estimator ...
arxiv  

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

The 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, Cuihua Du, Mingji Deng, Dashuang Ye, Hefan Li, Yang Huang, Jianrong Shi, Jun Ma   +7 more
doaj   +1 more source

Core and Tidal Radii of the Carina Dwarf Spheroidal Galaxy from UK Schmidt Telescope Plates [PDF]

, 1985
P. J. Godwin
openalex   +1 more source

Implications of elemental abundances in dwarf spheroidal galaxies [PDF]

Astronomy & Astrophysics, 2006
Unusual elemental abundance patterns observed for stars belonging to nearby dwarf spheroidal (dSph) galaxies are discussed. Analysis of the [alpha/H] vs. [Fe/H] diagrams where alpha represents Mg or average of alpha-elements reveals that Fe from Type Ia supernovae (SNe Ia) does not contribute to the stellar abundances in the dSph galaxies where the ...
openaire   +3 more sources

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

European 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, Guillermo Gambini, Luan B. Arbeletche, Marcos Olegario, Vitor de Souza   +4 more
doaj   +1 more source

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

, 1994
J. C. Hargreaves, G. Gilmore, M. J. Irwin, D. Carter   +3 more
openalex   +1 more source

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

The 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, Jundan Nie, Hao Tian, Chao Liu   +3 more
doaj   +1 more source

Anomalous Kolar Events and Dark Matter Decay in Dwarf Spheroidal Galaxies [PDF]

arXiv, 2019
Using the Fermi LAT data on the gamma ray emission from dwarf spheroidal galaxies, we get the upper bound on the probability of gamma rays from dark matter decay for the validity of explanation of the anomalous Kolar events as dark matter decay.
arxiv