Results 61 to 70 of about 34,432 (305)
The elusive old population of the dwarf spheroidal galaxy Leo I [PDF]
, 1999 We report the discovery of a significant old population in the dwarf spheroidal (dSph) galaxy Leo I as a result of a wide-area search with the ESO New Technology Telescope.
Bertelli G. +12 more
core +2 more sources
A Multi-epoch Kinematic Study of the Remote Dwarf Spheroidal Galaxy Leo II [PDF]
, 2017 We conducted a large spectroscopic survey of 336 red giants in the direction of the Leo II dwarf galaxy using Hectochelle on the Multiple Mirror Telescope, and we conclude that 175 of them are members based on their radial velocities and surface ...
M. Spencer +3 more
semanticscholar +1 more source
No WIMP mini-spikes in dwarf spheroidal galaxies [PDF]
Journal of Cosmology and Astroparticle Physics, 2015 The formation of black holes inevitably affects the distribution of dark and baryonic matter in their vicinity, leading to an enhancement of the dark matter density, called spike, and if dark matter is made of WIMPs, to a strong enhancement of the dark matter annihilation rate.
Wanders, Mark +3 more
openaire +3 more sources
Impact of Cosmic‐Ray Physics on Dark Matter Indirect Searches
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 The quest for the elusive dark matter (DM) that permeates the Universe (and in general the search for signatures of physics beyond the Standard Model at astronomical scales) provides a unique opportunity and a tough challenge to the high energy astrophysics community.
Daniele Gaggero +2 more
wiley +1 more source
Abundance Analysis of Stars at Large Radius in the Sextans Dwarf Spheroidal Galaxy
The Astrophysical Journal, 2023 We present the stellar parameters and chemical abundances of 30 elements for five stars located at large radii (3.5–10.7 times the half-light radius) in the Sextans dwarf spheroidal galaxy. We selected these stars using proper motions, radial velocities,
Ian U. Roederer +7 more
doaj +1 more source
SEARCH FOR GAMMA-RAY EMISSION FROM DES DWARF SPHEROIDAL GALAXY CANDIDATES WITH FERMI-LAT DATA [PDF]
, 2015 Due to their proximity, high dark-matter (DM) content, and apparent absence of non-thermal processes, Milky Way dwarf spheroidal satellite galaxies (dSphs) are excellent targets for the indirect detection of DM.
A. Drlica-Wagner +132 more
semanticscholar +1 more source
The Discreet Charm of Higgsino Dark Matter: A Pocket Review
Advances in High Energy Physics, Volume 2018, Issue 1, 2018., 2018 We give a brief review of the current constraints and prospects for detection of higgsino dark matter in low‐scale supersymmetry. In the first part we argue, after performing a survey of all potential dark matter particles in the MSSM, that the (nearly) pure higgsino is the only candidate emerging virtually unscathed from the wealth of observational ...
Kamila Kowalska +2 more
wiley +1 more source
The Effect of Tidal Stripping on Composite Stellar Populations in Dwarf Spheroidal Galaxies [PDF]
, 2009 We use N-body simulations to study the effects of tides on the kinematical structure of satellite galaxies orbiting a Milky Way-like potential. Our work is motivated by observations of dwarf spheroidal galaxies in the Local Group, for which often a ...
Battaglia, Giuseppina +2 more
core +3 more sources
Are dSph galaxies Galactic building blocks?
EPJ Web of Conferences, 2012 Dwarf spheroidal galaxies (dSph) are frequently assumed to represent surviving examples of a vast now destroyed population of small systems in which many of the stars now forming the Milky Way were formed. Ongoing accretion and considerable sub-structure
Gilmore G., Asiri H.M.
doaj +1 more source
The Astrophysical Journal, 2023 Elucidating dark matter density profiles in Galactic dwarf satellites is essential to understanding not only the quintessence of dark matter, but also the evolution of the satellites themselves.
Kohei Hayashi +3 more
doaj +1 more source