Results 21 to 30 of about 148,135 (75)
Local Group Dwarf Galaxies and the Fundamental Manifold of Spheroids [PDF]
Astrophys.J.642:L37-L40,2006, 2006 The fundamental manifold (FM), an extension of the fundamental plane formalism, incorporates all spheroid-dominated stellar systems from dwarf ellipticals up to the intracluster stellar populations of galaxy clusters by accounting for the continuous variation of the mass-to-light ratio within the effective radius r_e with scale.
arxiv +1 more source
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
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
Late-time dark matter oscillations and the core-cusp problem
Journal of High Energy Physics, 2021 The core-cusp problem persists as an unresolved tension between the pre- dictions of ΛCDM cosmology and observations of dark matter (DM) profiles in dwarf spheroidal and other galaxies.
James M. Cline +3 more
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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
Dwarf Spheroidal Satellite Formation in a Reionized Local Group [PDF]
, 2013 Dwarf spheroidal satellite galaxies have emerged a powerful probe of small-scale dark matter clustering and of cosmic reionization. They exhibit structural and chemical continuity with dwarf irregular galaxies in the field and with spheroidal galaxies in high-density environments. By combining empirical constraints derived for star formation at low gas
arxiv +1 more source
Radio-Frequency Searches for Dark Matter in Dwarf Galaxies
Galaxies, 2019 Dwarf spheroidal galaxies have long been discussed as optimal targets for indirect dark matter searches. However, the majority of such studies have been conducted with gamma-ray instruments.
Geoff Beck
doaj +1 more source
Search for Ultraheavy Dark Matter from Observations of Dwarf Spheroidal Galaxies with VERITAS
The Astrophysical Journal, 2023 Dark matter is a key piece of the current cosmological scenario, with weakly interacting massive particles (WIMPs) a leading dark matter candidate. WIMPs have not been detected in their conventional parameter space (100 GeV ≲ M _χ ≲ 100 TeV), a mass ...
A. Acharyya +53 more
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The Astrophysical JournalA fundamental question regarding the evolution of dwarf spheroidal galaxies is the identification of the key physical mechanisms responsible for gas depletion.
Roberto Hazenfratz +3 more
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The Chemical Composition of Local Group Dwarf Spheroidals [PDF]
, 2005 I will review the progress of VLT spectroscopy of large numbers of individual stars in nearby dwarf spheroidal galaxies. This spectroscopy has allowed us to obtain detailed insights into the chemical and dynamical properties of the resolved stellar population in these nearby systems.
arxiv +1 more source