Revisiting perfect fluid dark matter: Observational constraints from our galaxy
Physics Letters B, 2016 We revisit certain features of an assumed spherically symmetric perfect fluid dark matter halo in the light of the observed data of our galaxy, the Milky Way (MW). The idea is to apply the Faber–Visser approach of combined observations of rotation curves
Alexander A. Potapov +2 more
doaj +1 more source
Evolution of the Galactic Halo and Disk [PDF]
Symposium - International Astronomical Union, 1995 Correlations between stellar kinematics and chemical abundances are fossil evidence for evolutionary connections between Galactic structural components. Extensive stellar surveys show that the only tolerably clear distinction between galactic components appears in the distributions of specific angular momentum.
openaire +3 more sources
The Chemical Evolution of the Draco Dwarf Spheroidal Galaxy [PDF]
, 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.
Cohen, Judith G., Huang, Wenjin
core +2 more sources
DESI Observations of the Andromeda Galaxy: Revealing the Immigration History of Our Nearest Neighbor
The Astrophysical Journal, 2023 We present Dark Energy Spectroscopic Instrument (DESI) observations of the inner halo of M31, which reveal the kinematics of a recent merger—a galactic immigration event—in exquisite detail.
Arjun Dey +47 more
doaj +1 more source
Evidence for a Triaxial Milky Way Dark Matter Halo from the Sagittarius Stellar Tidal Stream
, 2009 Observations of the lengthy tidal streams produced by the destruction of the Sagittarius dwarf spheroidal (Sgr dSph) are capable of providing strong constraints on the shape of the Galactic gravitational potential.
Bailin +34 more
core +1 more source
New Constraints on the Galactic Halo Magnetic Field using Rotation Measures of Extragalactic Sources Towards the Outer Galaxy [PDF]
, 2012 We present a study of the Milky Way disk and halo magnetic field, determined from observations of Faraday rotation measure (RM) towards 641 polarized extragalactic radio sources in the Galactic longitude range 100-117 degs, within 30 degs of the Galactic
A. R. Taylor +45 more
core +2 more sources
EPJ Web of Conferences, 2017 We present our project to calibrate the RR Lyræ period-luminosity-metallicity relation using a sample of Galactic calibrators in the halo and globular clusters.
Marengo Massimo +7 more
doaj +1 more source
A Tilted Dark Halo Origin of the Galactic Disk Warp and Flare [PDF]
, 2023 The outer disk of the Milky Way Galaxy is warped and flared. Several mechanisms have been proposed to explain these phenomena, but none have quantitatively reproduced both features. Recent work has demonstrated that the Galactic stellar halo is tilted with respect to the disk plane, suggesting that at least some component of the dark matter halo may ...
arxiv +1 more source
AXIONS AND THEIR DISTRIBUTION IN GALACTIC HALOS [PDF]
The Identification of Dark Matter, 2003 10 pages, 1 figure, invited talk at the IDM2002 conference, September 2-6, 2002 in York ...
openaire +3 more sources
Great Circle tidal streams: evidence for a nearly spherical massive dark halo around the Milky Way [PDF]
, 2000 An all high-latitude sky survey for cool carbon giant stars in the Galactic halo has revealed 75 such stars, of which the majority are new detections.
Becquaert J.-F. +20 more
core +4 more sources