No WIMP mini-spikes in dwarf spheroidal galaxies [PDF]
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 +5 more sources
Star formation history of And XVIII: a dwarf spheroidal galaxy in isolation [PDF]
We present a photometric study of the Andromeda XVIII dwarf spheroidal galaxy associated with M31, and situated well outside of the virial radius of the M31 halo.
L. Makarova+4 more
semanticscholar +1 more source
The Sensitivity of the IceCube Neutrino Detector to Dark Matter Annihilating in Dwarf Galaxies [PDF]
In this paper, we compare the relative sensitivities of gamma-ray and neutrino observations to the dark matter annihilation cross section in leptophilic models such as have been designed to explain PAMELA data.
C. M. Hui+6 more
core +3 more sources
The distance to the Fornax dwarf spheroidal galaxy★ [PDF]
Accepted for publication on Monthly Notices of the Royal Astronomical ...
Luca Rizzi+5 more
openaire +4 more sources
Extended stellar substructure surrounding the Boötes I dwarf spheroidal galaxy [PDF]
We present deep stellar photometry of the Bootes I dwarf spheroidal galaxy in g and i band filters, taken with the Dark Energy Camera at Cerro Tololo in Chile.
T. A. Roderick+3 more
semanticscholar +1 more source
Blue straggler stars in dwarf spheroidal galaxies [PDF]
Blue straggler star (BSS) candidates have been observed in all old dwarf spheroidal galaxies (dSphs), however whether or not they are authentic BSSs or young stars has been a point of debate. To both address this issue and obtain a better understanding of the formation of BSSs in different environments we have analysed a sample of BSS candidates in two
Mapelli, M.+5 more
openaire +4 more sources
Search for gamma-ray emission from eight dwarf spheroidal galaxy candidates discovered in Year Two of Dark Energy Survey with Fermi-LAT data [PDF]
Very recently the Dark Energy Survey (DES) Collaboration has released their second group of Dwarf spheroidal (dSph) galaxy candidates. With the publicly-available Pass 8 data of Fermi-LAT we search for $\gamma-$ray emissions from the directions of these ...
Shang Li+9 more
semanticscholar +1 more source
A Chemical Evolution Model for the Fornax Dwarf Spheroidal Galaxy
Fornax is the brightest Milky Way (MW) dwarf spheroidal galaxy and its star formation history (SFH) has been derived from observations. We estimate the time evolution of its gas mass and net inflow and outflow rates from the SFH usinga simple star ...
Yuan Zhen, Qian Yong-Zhong, Jing Yi Peng
doaj +1 more source
Dynamics of the Fornax Dwarf Spheroidal Galaxy [PDF]
The mass to light ratio of the inner parts of the Fornax system is 3.2 ± 1.1. Its major axis rotation is only 3.4 ± 2.4 km s-1 over ± 1 kpc, which argues against its origin as a stripped dwarf irregular.
George Paltoglou, K. C. Freeman
openaire +2 more sources
DARK MATTER ANNIHILATION AND DECAY PROFILES FOR THE RETICULUM II DWARF SPHEROIDAL GALAXY [PDF]
The dwarf spheroidal galaxies (dSph) of the Milky Way are among the most attractive targets for indirect searches of dark matter (DM). In this work, we reconstruct the DM annihilation (J-factor) and decay profiles for the newly discovered dSph Reticulum ...
V. Bonnivard+8 more
semanticscholar +1 more source