Results 51 to 60 of about 34,432 (305)
FORMATION OF DWARF SPHEROIDAL GALAXIES VIA MERGERS OF DISKY DWARFS [PDF]
The Astrophysical Journal, 2011 6 pages, 2 figures, LaTeX (uses emulateapj.cls). Replaced to match the version accepted for publication in ApJL.
Kazantzidis, S +4 more
openaire +3 more sources
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 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
Globular clusters and dwarf spheroidal galaxies [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2008 Abstract Traditionally, globular clusters and dwarf spheroidal galaxies have been distinguished by using one or more of the following criteria: (i) mass, (ii) luminosity, (iii) size, (iv) mass-to-light ratio and (v) spread in metallicity.
openaire +2 more sources
On the Origins of Extreme Velocity Stars as Revealed by Large-scale Galactic Surveys
The Astronomical Journal, 2023 We assemble a large sample of 12,784 high-velocity stars with total velocity V _GSR ≥ 300 km s ^−1 , selected from RAVE DR5, SDSS DR12, LAMOST DR8, APOGEE DR16, GALAH DR2, and Gaia EDR3.
Qing-Zheng Li +5 more
doaj +1 more source
A discrete chemo-dynamical model of the dwarf spheroidal galaxy Sculptor: mass profile, velocity anisotropy and internal rotation [PDF]
, 2016 We present a new discrete chemo-dynamical axisymmetric modelling technique, which we apply to the dwarf spheroidal galaxy Sculptor. The major improvement over previous Jeans models is that realistic chemical distributions are included directly in the ...
Ling Zhu, G. Ven, L. Watkins, L. Posti
semanticscholar +1 more source
Structural analysis of the Sextans dwarf spheroidal galaxy [PDF]
, 2016 We present wide-field $g$ and $i$ band stellar photometry of the Sextans dwarf spheroidal galaxy and its surrounding area out to four times its half-light radius ($r_h=695\,$pc), based on images obtained with the Dark Energy Camera at the 4-m Blanco ...
T. A. Roderick +3 more
semanticscholar +1 more source
A VIRIAL CORE IN THE SCULPTOR DWARF SPHEROIDAL GALAXY [PDF]
The Astrophysical Journal, 2012 4 pages, 2 figures, ApJL ...
Agnello, A., Evans, N. W.
openaire +2 more sources
Dark satellites and the morphology of dwarf galaxies [PDF]
, 2012 One of the strongest predictions of the LambdaCDM cosmological model is the presence of dark satellites orbiting all types of galaxies. We focus here on the dynamical effects of such satellites on disky dwarf galaxies, and demonstrate that these ...
Bergvall +16 more
core +2 more sources
THE CHEMICAL EVOLUTION OF THE DRACO DWARF SPHEROIDAL GALAXY [PDF]
The Astrophysical Journal, 2009 We present an abundance analysis based on high resolution spectra of 8 stars selected to span the full range in metallicity in the Draco dwarf spheroidal galaxy. We find [Fe/H] for the sample stars ranges from -1.5 to -3.0 dex. Combining our sample with previously published work for a total of 14 luminous Draco giants, we show that the abundance ratios
Cohen, Judith G., Huang, Wenjin
openaire +3 more sources