Results 21 to 30 of about 74,154 (347)
GAS CONDENSATION IN THE GALACTIC HALO [PDF]
The Astrophysical Journal, 2012 13 pages, 8 figures, submitted to ...
M. Ryan Joung +3 more
openaire +4 more sources
Vacuum Polarization Instead of “Dark Matter” in a Galaxy
Universe, 2022 We considered a vacuum polarization inside a galaxy in the eikonal approximation and found that two possible types of polarization exist. The first type is described by the equation of state p=ρ/3, similar to radiation.
Sergey L. Cherkas +1 more
doaj +1 more source
Stars in the Galactic Halo [PDF]
Astrophysics and Space Science, 1995 The field star halo is comprised of those field stars that are like the stars found in the halo globular clusters. We discuss the halo properties — in particular whether Vrot is a function of z. An analysis of recent surveys for blue horizontal branch stars is described; the halo that is defined by these stars is composite and contains both a spherical
openaire +2 more sources
Dark matter annihilation at the galactic center [PDF]
, 1999 If cold dark matter is present at the galactic center, as in current models of the dark halo, it is accreted by the central black hole into a dense spike.
A. Eckart +24 more
core +2 more sources
A simple multistage closed-(box+reservoir) model of chemical evolution [PDF]
Serbian Astronomical Journal, 2011 Simple closed-box (CB) models of chemical evolution are extended on two respects, namely (i) simple closed-(box+reservoir) (CBR) models allowing gas outflow from the box into the reservoir (Hartwick 1976) or gas inflow into the box from the ...
Caimmi R.
doaj +1 more source
Hot halos and galactic glasses (carbonado) [PDF]
Journal of High Energy Physics, 2012 We initiate a systematic study of the state space of non-extremal, stationary black hole bound states in four-dimensional N = 2 supergravity. Specifically, we show that an exponential multitude of classically stable "halo" bound states can be formed between large finite temperature D4-D0 black hole cores and much smaller, arbitrarily charged black ...
Bram Gaasbeek +5 more
openaire +4 more sources
Substructure Boosts to Dark Matter Annihilation from Sommerfeld Enhancement [PDF]
, 2009 The recently introduced Sommerfeld enhancement of the dark matter annihilation cross section has important implications for the detection of dark matter annihilation in subhalos in the Galactic halo.
F. A. Aharonian +11 more
core +2 more sources
GALACTIC WARPS IN TRIAXIAL HALOS [PDF]
The Astrophysical Journal, 2009 We study the behaviors of galactic disks in triaxial halos both numerically and analytically to see if warps can be excited and sustained in triaxial potentials. We consider the following two scenarios: 1) galactic disks that are initially tilted relative to the equatorial plane of the halo (for a pedagogical purpose), and 2) tilted infall of dark ...
Myoungwon Jeon +2 more
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
Mapping the Galactic halo with main-sequence and RR Lyrae stars
EPJ Web of Conferences, 2012 We present an analysis of Galactic halo structure, substructure, and metallicity traced by main-sequence and RR Lyrae stars selected from the SDSS stripe 82 and CFHT Legacy Survey data sets.
Sesar B.
doaj +1 more source