Results 51 to 60 of about 148,135 (75)
Tracing the Intrinsic Shapes of Dwarf Galaxies out to Four Effective Radii: Clues to Low-Mass Stellar Halo Formation [PDF]
arXiv, 2020 Though smooth, extended spheroidal stellar outskirts have long been observed around nearby dwarf galaxies, it is unclear whether dwarfs generically host an extended stellar halo. We use imaging from the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) to measure the shapes of dwarf galaxies out to four effective radii for a sample of dwarfs at 0 ...
arxiv
Proper Motions of Dwarf Spheroidal Galaxies from Hubble Space Telescope Imaging. III: Measurement for Ursa Minor [PDF]
, 2005 This article presents a measurement of the proper motion of the Ursa Minor dwarf spheroidal galaxy determined from images taken with the Hubble Space Telescope in two distinct fields.
arxiv +1 more source
The Astrophysical Journal Supplement SeriesIn this study, we compare the structural parameters of ultradiffuse galaxies (UDGs) to those of other dwarf galaxies and investigate whether UDGs form a distinct population.
Raphael Zöller +3 more
doaj +1 more source
Oscillating composite asymmetric dark matter
Journal of High Energy Physics, 2020 The asymmetric dark matter (ADM) scenario can solve the coincidence problem between the baryon and the dark matter (DM) abundance when the DM mass is of O $$ \mathcal{O} $$ (1) GeV.
Masahiro Ibe +3 more
doaj +1 more source
The Andromeda Dwarf Spheroidal Galaxies [PDF]
in "The Stellar Content of Local Group Galaxies", IAU Symposium
192, ed. P. Whitelock & R. Cannon, page 203 (1999), 1998 Our current knowledge of M31's dwarf spheroidal companions is reviewed. Two topics of recent interest constitute the bulk of this review. First, color-magnitude diagrams reaching below the horizontal branch have been constructed for two M31 dwarf spheroidals based on images from HST/WFPC2. The horizontal branches are predominantly red in both galaxies,
arxiv
Dwarf spheroidal galaxies in nearby groups imaged with HST [PDF]
, 2005 An all-sky list of 88 nearby dwarf spheroidal (dSph) galaxies with distances D < 10 Mpc is considered. Most of the objects have recently been found by Karachentseva & Karachentsev based on POSSII/ESO-SERC survey. A hundred more dSph galaxies are expected in this volume, being missed so far because of their low luminosity and low surface brightness ...
arxiv +1 more source
The Effect of Tidal Stripping on Composite Stellar Populations in Dwarf Spheroidal Galaxies
Advances in Astronomy, 2010 We use N-body simulations to study the effects of tides on the kinematical structure of satellite galaxies orbiting a Milky Way-like potential. Here we focus on the evolution of a spherical, dark matter dominated satellite, which is modelled with two ...
Laura V. Sales +2 more
doaj +1 more source
Disentangling γ − β: The Fourth-order Velocity Moments Based on Spherical Jeans Analysis
The Astrophysical JournalDistinguishing a core and a cusp within dark matter halos is complexified by the existence of mass-anisotropy degeneracy, where various combinations of velocity anisotropy ( β ) and inner density slope ( γ ) yield similar observational signatures.
Dafa Wardana +2 more
doaj +1 more source
Little Bear’s pulsating stars: Variable star census of UMi dSph Galaxy
EPJ Web of Conferences, 2017 Recent observations and a photometric search for variable stars in the Ursa Minor dwarf spheroidal galaxy (UMi dSph) are presented. Our observations were taken at Apache Point Observatory in 2014 and 2016 using the 0.5m ARCSAT telescope and the West ...
Kinemuchi K. +4 more
doaj +1 more source
The inert doublet model in the light of Fermi-LAT gamma-ray data: a global fit analysis
European Physical Journal C: Particles and Fields, 2017 We perform a global fit within the inert doublet model taking into account experimental observables from colliders, direct and indirect dark matter searches and theoretical constraints.
Benedikt Eiteneuer +2 more
doaj +1 more source