Results 141 to 150 of about 34,781 (306)

The evolution of dwarf galaxy satellites with different dark matter density profiles in the ErisMod simulations. I. The early infalls [PDF]

, 2015
We present the first simulations of tidal stirring of dwarf galaxies in the Local Group carried out in a cosmological context. We use the ErisDARK simulation of a MW-sized galaxy to identify some of the most massive subhalos ($M_{vir} > 10^8 M_{\odot ...
Mayer, Lucio, Quinn, Thomas, Tomozeiu, Mihai   +2 more
core   +1 more source

Impact of axisymmetric mass models for dwarf spheroidal galaxies on indirect dark matter searches [PDF]

, 2016
Dwarf spheroidals are low-luminosity satellite galaxies of the Milky Way highly dominated by dark matter (DM). Therefore, they are prime targets to search for signals from dark matter annihilation using gamma-ray observations.
N. Klop, F. Zandanel, Kohei Hayashi, S. Ando   +3 more
semanticscholar   +1 more source

Galaxias Enanas del Grupo Local

Momento, 2009
The satellite galaxies of the Milky Way are very important both for the studies of the formation and evolution of galaxies and for the research on the dark matter problem. In the present review paper some structural properties of the Local Group, as well
A Casallas Lagos, D J Cubillos, R A Casas Miranda   +2 more
doaj  

A Study of Abundance Patterns in the Sextans and Sculptor Dwarf Spheroidal Galaxies

The Astrophysical Journal
In this work, we employ a multicomponent decomposition model to study the Sextans and Sculptor dwarf spheroidal galaxies, which have distinct evolutionary histories.
Shuaishuai Yang, Shichao Zhang, Lu Zhang, Hongjie Li   +3 more
doaj   +1 more source

ENRICHMENT OF r-PROCESS ELEMENTS IN DWARF SPHEROIDAL GALAXIES IN CHEMO-DYNAMICAL EVOLUTION MODEL [PDF]

, 2015
The rapid neutron-capture process (r-process) is a major process for the synthesis of elements heavier than iron-peak elements, but the astrophysical site(s) of the r-process has not yet been identified.
Y. Hirai, Y. Ishimaru, T. Saitoh, M. Fujii, J. Hidaka, T. Kajino   +5 more
semanticscholar   +1 more source

Spheroidal and elliptical galaxy radial velocity dispersion determined from Cosmological General Relativity

, 2007
Radial velocity dispersion in spheroidal and elliptical galaxies, as a function of radial distance from the center of the galaxy, has been derived from Cosmological Special Relativity.
F.J. Oliveira, J.G. Hartnett, John G. Hartnett, M. Carmeli, M. Carmeli, M. Carmeli, M. Carmeli, W. Jaffe   +7 more
core   +1 more source

New limits on the dark matter lifetime from dwarf spheroidal galaxies using Fermi-LAT [PDF]

, 2015
Dwarf spheroidal galaxies (dSphs) are promising targets for the indirect detection of dark matter through gamma-ray emission due to their proximity, lack of astrophysical backgrounds and high dark matter density.
M. Baring, T. Ghosh, F. Queiroz, K. Sinha   +3 more
semanticscholar   +1 more source

Machine Learning Techniques to Distinguish Giant Stars from Dwarf Stars Using Only Photometry—Pushing Redward

The Astronomical Journal
We present our photometric method, which combines Subaru/Hyper Suprime-Cam N B 515, g -band, and i- band filters to distinguish giant stars in Local Group galaxies from Milky Way dwarf contamination.
Keyi Ding, Carrie Filion, Rosemary F.G. Wyse, Evan N. Kirby, Itsuki Ogami, Masashi Chiba, Yutaka Komiyama, László Dobos, Alexander S. Szalay   +8 more
doaj   +1 more source

Dark Matter Searches with HAWC

, 2017
The High Altitude Water Cherenkov (HAWC) gamma-ray observatory is a wide field-of-view observatory sensitive to 0.5 TeV - 100 TeV gamma-rays and cosmic-rays in the State of Puebla, Mexico at an altitude of 4100m.
Smith, Andrew J., Yapici, Tolga
core   +1 more source

Metallicity gradients in the Sagittarius dwarf spheroidal galaxy [PDF]

Astronomy & Astrophysics, 2001
Metallicity gradients in the Sagittarius dwarf Galaxy (Sgr) are investigated by using infrared photometric data from the 2MASS survey. To search for metallicity effects, the giant branch in a field situated near the Center of the Sgr is compared to the giant branch in a field situated near its southern edge.
openaire   +4 more sources