Results 31 to 40 of about 74,154 (347)
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
doaj +1 more source
Interstellar titanium in the galactic halo [PDF]
The Astrophysical Journal, 1995 We present observations of Ti~II~$ 3384$ absorption towards 15 distant stars in the Galactic halo and the Magellanic Clouds. These new data extend existing surveys of the distribution of Ti$^+$ to larger distances from the plane of the Galaxy than sampled previously, allowing the scale height of titanium to be determined for the first time.
Max Pettini, Keith Lipman
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FOSSILs in the Galactic Halo [PDF]
Proceedings of the International Astronomical Union, 2018 AbstractWe use a matched filter to detect compact groups of old, metal-poor stars that we term FOSSILs (Fragments of Old Stellar Systems in Limbo). With size scales on the order of 10 arcminutes, distances ranging from 2 to 200 kpc, and memberships ranging from a handful to several dozen stars, these FOSSILs stand out from the surrounding field and are
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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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Globular Cluster Abundances and What They Can Tell Us About Galaxy Formation [PDF]
, 2009 We review the properties of globular clusters which make them useful for studying the Galactic halo, Galactic chemical evolution, and the early stages of the formation of the Milky Way. We review the evidence that GCs have a chemical inventory similar to
Carretta +4 more
core +3 more sources
European Physical Journal C: Particles and Fields, 2022 Dark matter (DM) annihilation in the galactic halo can be enhanced relative to that in the early Universe due to the Breit–Wigner enhancement, if the DM particles annihilate through a narrow resonance.
Yu-Chen Ding +3 more
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On the early evolution of the Galactic halo [PDF]
Astronomy & Astrophysics, 2003 It is shown that the low metallicity tail of the stellar metallicity distribution predicted by simple Outflow models for the Milky Way halo depends sensitively on whether Instantaneous Recycling is adopted or relaxed. In both cases, current - and still preliminary - data suggest a ``G-dwarf problem'' for the halo (reminiscent of the local disk).
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Is the galactic halo baryonic?
, 1995 Recent observations of microlensing events in the Large Magellanic Cloud suggest that a sizeable fraction of the galactic halo is in form of MACHOs with mass less than abou 0.1 M_{\odot}. Here we argue that molecular clouds (mainly H_2) located in the galactic halo can contribute substantially to its total mass.
DE PAOLIS, Francesco +3 more
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Evolution of the Galactic Halo and Disk [PDF]
Astrophysics and Space Science, 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.
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The asymmetric structure of the Galactic halo [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 17 pages, 7 figures, 5 tables, MNRAS ...
J. Y. Hu, Yong Xu, Licai Deng
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