Observed Properties of Dark Matter on Small Spatial Scales [PDF]
, 2007 The nature of dark matter is one of the outstanding questions of astrophysics. The internal motions of member stars reveal that the lowest luminosity galaxies in the Local Group are the most dark-matter dominated.
Benson +4 more
core +1 more source
ESTIMATING THE GeV EMISSION OF MILLISECOND PULSARS IN DWARF SPHEROIDAL GALAXIES [PDF]
, 2016 We estimate the conventional astrophysical emission from dwarf spheroidal satellite galaxies (dSphs) of the Milky Way (MW), focusing on millisecond pulsars (MSPs), and evaluate the potential for confusion with dark matter (DM) annihilation signatures at ...
Miles Winter +3 more
semanticscholar +1 more source
Elemental Abundances in M31: The Kinematics and Chemical Evolution of Dwarf Spheroidal Satellite Galaxies [PDF]
Astronomical Journal, 2019 We present deep spectroscopy from Keck/DEIMOS of Andromeda I, III, V, VII, and X, all of which are dwarf spheroidal satellites of M31. The sample includes 256 spectroscopic members across all five dSphs.
E. Kirby +6 more
semanticscholar +1 more source
, 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 +7 more
core +1 more source
Lack of nuclear clusters in dwarf spheroidal galaxies: implications for massive black holes formation and the cusp/core problem [PDF]
, 2016 One of the leading scenarios for the formation of nuclear star clusters in galaxies is related to the orbital decay of globular clusters (GCs) and their subsequent merging, though alternative theories are currently debated.
M. Arca-Sedda, R. Capuzzo-Dolcetta
semanticscholar +1 more source
Dwarf Spheroidal Galaxies and Globular Clusters [PDF]
Symposium - International Astronomical Union, 1988 Recent observational results for dwarf spheroidal galaxies are reviewed and discussed. In particular, the differences in stellar populations between dwarf spheroidal galaxies and globular clusters are highlighted. It seems most probable that the origin and evolution of dwarf spheroidal galaxies was very different from that of globular clusters.
openaire +1 more source
Foreground effect on the $J$-factor estimation of classical dwarf spheroidal galaxies [PDF]
, 2016 The gamma-ray observation of the dwarf spheroidal galaxies (dSphs) is a promising approach to search for the dark matter annihilation (or decay) signal.
K. Ichikawa +6 more
semanticscholar +1 more source
Sulphur in the Sculptor dwarf spheroidal galaxy [PDF]
Astronomy & Astrophysics, 2015 9 pages, 11 figures, 2 tables + 3 online tables, accepted in A& ...
Skúladóttir, Á. +6 more
openaire +3 more sources
Exploring the Evolution of a Dwarf Spheroidal Galaxy with SPH Simulations. II. AGN Feedback
The Astrophysical JournalWe investigate active galactic nucleus (AGN) feedback from an intermediate-mass black hole at the center of a dwarf spheroidal galaxy, by performing isolated galaxy simulations using a modified version of the GADGET-3 code. We consider Leo II (PGC 34176)
Roberto Hazenfratz +3 more
doaj +1 more source
Testing Modified Gravity with Dwarf Spheroidal Galaxies [PDF]
, 2016 The observed velocity dispersion of the classical dwarf spheroidal (dSph) galaxies of the Milky Way (MW) requires the Newtonian stellar mass-to-light ($M_*/L$) ratios in the range of about 10 to more than 100 solar units that are well outside the ...
H. Haghi, Vahid Amiri
semanticscholar +1 more source