Results 141 to 150 of about 12,786 (266)

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

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

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

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

The dynamical and chemical evolution of dwarf spheroidal galaxies with GEAR [PDF]

, 2012
Yves Revaz, P. Jablonka
openalex   +1 more source

Chemical feature of Eu abundance in the Draco dwarf spheroidal galaxy [PDF]

, 2015
Takuji Tsujimoto, Miho N. Ishigaki, Toshikazu Shigeyama, Wako Aoki   +3 more
openalex   +1 more source

Sommerfeld-enhanced dark matter searches with dwarf spheroidal galaxies [PDF]

, 2021
Shin’ichiro Ando, Koji Ishiwata
openalex   +1 more source

WFPC2 Observations of the Carina Dwarf Spheroidal Galaxy.

The Astronomical Journal, 1997
We present our analysis of Hubble Space Telescope Wide Field Planetary Camera 2 observations in F555W (~V) and F814W (~I) of the Carina dwarf spheroidal galaxy. The resulting V vs (V-I) color-magnitude diagrams reach V ~ 27.1 mag. The reddening of Carina is estimated to be E(V-I) = 0.08 +- 0.02 mag.
openaire   +2 more sources

The Draco Dwarf Spheroidal Galaxy in the First Year of Dark Energy Spectroscopic Instrument Data

The Astrophysical Journal
We investigate the spatial distribution, kinematics, and metallicity of stars in the Draco dwarf spheroidal galaxy using data from the Dark Energy Spectroscopic Instrument (DESI).
J. Ding, C. Rockosi, Ting S. Li, S. E. Koposov, A. H. Riley, W. Wang, A. P. Cooper, N. Kizhuprakkat, M. Lambert, G. E. Medina, N. Sandford, J. Aguilar, S. Ahlen, D. Bianchi, D. Brooks, T. Claybaugh, A. de la Macorra, P. Doel, J. E. Forero-Romero, E. Gaztañaga, S. Gontcho A Gontcho, G. Gutierrez, J. Guy, M. Ishak, R. Kehoe, T. Kisner, A. Kremin, O. Lahav, M. Landriau, L. Le Guillou, A. Meisner, R. Miquel, J. Moustakas, F. Prada, I. Pérez-Ràfols, G. Rossi, E. Sanchez, M. Schubnell, J. Silber, D. Sprayberry, G. Tarlé, B. A. Weaver, R. Zhou   +42 more
doaj   +1 more source

Variable stars in Fornax dwarf spheroidal galaxy

, 2005
10 pages, 9 figures, to appear in the Proceedings of "Resolved Stellar Populations", 2005, Cancun ...
Greco, C., Clementini, G., Held, E. V., Poretti, E., Catelan, M., Dell'Arciprete, L., Gullieuszik, M., Maio, M., Rizzi, L., Smith, H. A., Pritzl, B. J., Rest, A., De Lee, N.   +12 more
openaire   +2 more sources