Results 21 to 30 of about 73,795 (320)
The Galactic Halo Ionising Field [PDF]
Publications of the Astronomical Society of Australia, 1997 AbstractThere has been much debate in recent decades as to what fraction of ionising photons from star-forming regions in the Galactic disk escape into the halo. The recent detection of the Magellanic Stream in optical line emission at the CTIO 4 m and the AAT 3·9 m telescopes may now provide the strongest evidence that at least some of the radiation ...
J. Bland-Hawthorn, Philip R. Maloney
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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
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GAS CONDENSATION IN THE GALACTIC HALO [PDF]
The Astrophysical Journal, 2012 13 pages, 8 figures, submitted to ...
M. Ryan Joung +3 more
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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.
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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
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Gravitational Stability of Vortices in Bose-Einstein Condensate Dark Matter
The Open Journal of Astrophysics, 2022 We investigate a simple model for a galactic halo under the assumption that it is dominated by a dark matter component in the form of a Bose-Einstein condensate involving an ultra-light scalar particle.
Mark N Brook, Peter Coles
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Galactic Stellar Haloes in the CDM Model [PDF]
AIP Conference Proceedings, 2010 We present six simulations of galactic stellar haloes formed by the tidal disruption of accreted dwarf galaxies in a fully cosmological setting. Our model is based on the Aquarius project, a suite of high resolution N-body simulations of individual dark matter haloes.
A. P. Cooper +13 more
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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.
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The Disk-Halo Distinction of Galaxies Using Faraday Tomography
Galaxies, 2018 Faraday tomography allows us to study the distribution and properties of the magnetoionic medium of galaxies through the Faraday effect. However, this can be achieved only after the Faraday spectrum is interpreted.
Shinsuke Ideguchi
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Stars in the Galactic Halo [PDF]
Symposium - International Astronomical Union, 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
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