Results 31 to 40 of about 159,319 (262)
The Astronomical Journal, 2023 SX Phoenicis (SXP) variables are short-period pulsating stars that exhibit a period–luminosity (PL) relation. We derived the gri -band PL and extinction-free period–Wesenheit (PW) relations, as well as the period-color and reddening-free period-Q-index ...
Chow-Choong Ngeow +6 more
doaj +1 more source
The Chemical Signature of a Relic Star Cluster in the Sextans Dwarf Spheroidal Galaxy - Implications for Near-Field Cosmology [PDF]
, 2012 We present tentative evidence for the existence of a dissolved star cluster at [Fe/H]=-2.7 in the Sextans dwarf spheroidal galaxy. We use the technique of chemical tagging to identify stars that are highly clustered in a multi-dimensional chemical ...
Bland-Hawthorn, Joss +3 more
core +2 more sources
The Astrophysical Journal, 2023 Elucidating dark matter density profiles in Galactic dwarf satellites is essential to understanding not only the quintessence of dark matter, but also the evolution of the satellites themselves.
Kohei Hayashi +3 more
doaj +1 more source
The Origin Of Dwarf Spheroidal Galaxies [PDF]
Symposium - International Astronomical Union, 1983 Two dwarf spheroidal galaxies are associated with the Magellanic Stream with their major axes oriented along it. Evidence suggests that all the dwarf spheroidal satellites of the Galaxy belong to one or other of two streams of tidal debris. If this is true the orbits will give the first reliable determination of the total mass of the Galaxy out to 120 ...
openaire +2 more sources
Structure of the Draco Dwarf Spheroidal Galaxy [PDF]
The Astronomical Journal, 2002 25 pages, 11 figures, 3 tables.
Slawomir Piatek +3 more
openaire +4 more sources
Abundance Analysis of Stars at Large Radius in the Sextans Dwarf Spheroidal Galaxy
The Astrophysical Journal, 2023 We present the stellar parameters and chemical abundances of 30 elements for five stars located at large radii (3.5–10.7 times the half-light radius) in the Sextans dwarf spheroidal galaxy. We selected these stars using proper motions, radial velocities,
Ian U. Roederer +7 more
doaj +1 more source
Zinc abundances in the Sculptor dwarf spheroidal galaxy, [PDF]
Astronomy & Astrophysics, 2017 Accepted in A&A, 14 pages, 16 figures, 8 ...
Stefania Salvadori +6 more
openaire +7 more sources
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
doaj +1 more source
Modeling star formation in dwarf spheroidal galaxies: a case for extended dark matter halos [PDF]
Astrophys.J. 624 (2005) 726-741, 2005 We propose a simple model for the formation of dwarf spheroidal galaxies, in which stars are assumed to have formed from isothermal gas in hydrostatic equilibrium inside extended dark matter halos. After expelling the leftover gas, the stellar system undergoes a dynamical relaxation inside the dark matter halo.
arxiv +1 more source
The dynamical and chemical evolution of dwarf spheroidal galaxies [PDF]
Astronomy & Astrophysics, 2009 21 Pages, 19 figures ; Accepted for publication in A&A.
B. Letarte +11 more
openaire +8 more sources