Results 11 to 20 of about 1,735 (217)
Mass Modelling of dwarf Spheroidal Galaxies [PDF]
Proceedings of the International Astronomical Union, 2007 AbstractWe study the origin and properties of unbound stars in the kinematic samples of dwarf spheroidal galaxies. For this purpose we have run a high resolution N-body simulation of a two-component dwarf galaxy orbiting in a Milky Way potential. We create mock kinematic data sets by observing the dwarf in different directions.
Klimentowski, J +5 more
openaire +5 more sources
Manganese in dwarf spheroidal galaxies [PDF]
Astronomy & Astrophysics, 2012 19 pages, 10 figures, accepted for publication in Astronomy & ...
North, P. +12 more
core +8 more sources
Dwarf Spheroidal Galaxies in the Virgo Cluster [PDF]
The Astrophysical Journal, 1998 We present a study of the smallest and faintest galaxies found in a very deep photographic R band survey of regions of the Virgo Cluster, totalling over 3 square degrees, made with the UK Schmidt Telescope. The objects we detect have the same physical sizes and surface brightnesses as Local Group dwarf spheroidal galaxies.
Jones, JB +3 more
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The internal kinematics of dwarf spheroidal galaxies [PDF]
EAS Publications Series, 2006 8 pages, 5 figs. Invited review in Proceedings of XXIst IAP Colloquium, "Mass Profiles & Shapes of Cosmological Structures" (Paris, 4-9 July 2005), eds G.A. Mamon, F. Combes, C. Deffayet, B. Fort (Paris: EDP Sciences)
Wilkinson, M. I. +7 more
openaire +4 more sources
FORMATION OF DWARF SPHEROIDAL GALAXIES VIA MERGERS OF DISKY DWARFS [PDF]
The Astrophysical Journal, 2011 We perform collisionless N-body simulations to investigate whether binary mergers between rotationally supported dwarfs can lead to the formation of dwarf spheroidal galaxies (dSphs). Our simulation campaign is based on a hybrid approach combining cosmological simulations and controlled numerical experiments.
Kazantzidis, S +4 more
openaire +6 more sources
Implications of elemental abundances in dwarf spheroidal galaxies [PDF]
Astronomy & Astrophysics, 2006 Unusual elemental abundance patterns observed for stars belonging to nearby dwarf spheroidal (dSph) galaxies are discussed. Analysis of the [alpha/H] vs. [Fe/H] diagrams where alpha represents Mg or average of alpha-elements reveals that Fe from Type Ia supernovae (SNe Ia) does not contribute to the stellar abundances in the dSph galaxies where the ...
T. Tsujimoto
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Dwarf spheroidal galaxies in the M81 group of galaxies [PDF]
Astronomische Nachrichten, 2009 AbstractWe study the properties of the dwarf galaxy population in the nearby interacting M81 group of galaxies. In particular, we are deriving the metallicity distribution functions, the ages and the star formation histories of these dwarf galaxies based on data from the Hubble Space Telescope's Advanced Camera for Surveys and the Sloan Digital Sky ...
Lianou, S., Grebel, E. K., Koch, Andreas
openaire +2 more sources
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 +6 more sources
Gravitational tides and dwarf spheroidal galaxies [PDF]
Astronomy & Astrophysics, 2014 The effect of the local environment on the evolution of dwarf spheroidal galaxies is poorly understood. We have undertaken a suite of simulations to investigate the tidal impact of the Milky Way on the chemodynamical evolution of dwarf spheroidals that resemble present day classical dwarfs using the SPH code GEAR.
Nichols, Matthew +2 more
openaire +6 more sources
Numerical simulations of the metallicity distribution in dwarf spheroidal galaxies [PDF]
, 2006 : Recent observations show that the number of stars with very low metallicities in the dwarf spheroidal satellites of the Milky Way is low, despite the low average metallicities of stars in these systems.
Battaglia, G. +4 more
core +14 more sources