Results 81 to 90 of about 170,345 (283)
Chemical and Photometric Evolution Models for Disk, Irregular, and Low Mass Galaxies
Advances in Astronomy, Volume 2014, Issue 1, 2014., 2014 We summarize the updated set of multiphase chemical evolution models performed with 44 theoretical radial mass initial distributions and 10 possible values of efficiencies to form molecular clouds and stars. We present the results about the infall rate histories, the formation of the disk, and the evolution of the radial distributions of diffuse and ...
Mercedes Mollá, Jorge Iglesias Páramo
wiley +1 more source
Search for gamma-ray emission from eight dwarf spheroidal galaxy candidates discovered in Year Two of Dark Energy Survey with Fermi-LAT data [PDF]
, 2015 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
The distance to the Fornax dwarf spheroidal galaxy★ [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 Accepted for publication on Monthly Notices of the Royal Astronomical ...
Luca Rizzi +5 more
openaire +4 more sources
Resonant stripping as the origin of dwarf spheroidal galaxies [PDF]
, 2009 Dwarf spheroidal galaxies are the most dark matter dominated systems in the nearby Universe and their origin is one of the outstanding puzzles of how galaxies form. Dwarf spheroidals are poor in gas and stars, making them unusually faint, and those known as ultra-faint dwarfs have by far the lowest measured stellar content of any galaxy.
arxiv +1 more source
Chemodynamical Simulations of Dwarf Galaxy Evolution
Advances in Astronomy, Volume 2014, Issue 1, 2014., 2014 In this review I give a summary of the state of the art for what concerns the chemo‐dynamical numerical modelling of galaxies in general and of dwarf galaxies in particular. In particular, I focus my attention on (i) initial conditions, (ii) the equations to solve; (iii) the star formation process in galaxies, (iv) the initial mass function, (v) the ...
Simone Recchi +1 more
wiley +1 more source
Blue straggler stars in dwarf spheroidal galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 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
A possible formation scenario for dwarf spheroidal galaxies - III. Adding star formation histories to the fiducial model [PDF]
, 2017 Dwarf spheroidal galaxies are regarded as the basic building blocks in the formation of larger galaxies and are believed to be the most dark matter dominated systems known in the Universe. There are several models that attempt to explain their formation and evolution, but they have problems to model the formation of isolated dwarf spheroidal galaxies ...
arxiv +1 more source
Astronomical Signatures of Dark Matter
Advances in High Energy Physics, Volume 2014, Issue 1, 2014., 2014 Several independent astronomical observations in different wavelength bands reveal the existence of much larger quantities of matter than what we would deduce from assuming a solar mass to light ratio. They are very high velocities of individual galaxies within clusters of galaxies, higher than expected rotation rates of stars in the outer regions of ...
Paul Gorenstein +2 more
wiley +1 more source
DARK MATTER ANNIHILATION AND DECAY PROFILES FOR THE RETICULUM II DWARF SPHEROIDAL GALAXY [PDF]
, 2015 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
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 +4 more sources