Results 41 to 50 of about 105,508 (303)
Odessa Astronomical Publications, 2017 The thick accretion disk and donor’s wind on the example of CYG X-1 are computed. The main aim of the present simulations is to calculate the precessing thick accretion disk and ON- and OFF-state generation by the methods of 3D numerical hydrodynamics ...
V. V. Nazarenko, S. V. Nazarenko
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Gauging the Galactic thick disk with RR Lyrae stars
EPJ Web of Conferences, 2012 In this contribution we present results from the QUEST RR Lyrae Survey of the thick disk. The survey spans ~480 sq. deg. at low latitude |b| < 30°, with multi-epoch VRI observations, obtained with the QUEST-I camera at the 1m Jürgen Stock Schmidt ...
Cruz G. +4 more
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A possible age-metallicity relation in the Galactic thick disk? [PDF]
Astron.Astrophys. 421 (2004) 969, 2004 A sample of 229 nearby thick disk stars has been used to investigate the existence of an age-metallicity relation (AMR) in the Galactic thick disk. The results indicate that that there is indeed an age-metallicity relation present in the thick disk. By dividing the stellar sample into sub-groups, separated by 0.1 dex in metallicity, we show that the ...
arxiv +1 more source
THE IMPRINTS OF THE GALACTIC BAR ON THE THICK DISK WITH RAVE [PDF]
The Astrophysical Journal, 2015 Accepted for publication in ApJL; 7 pages, 3 figures, 1 ...
Amina Helmi +17 more
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The Astrophysical Journal, 2023 The Milky Way (MW) stellar disk has both a thin and a thick component. The thin disk is composed mostly of younger stars (≲8 Gyr) with a lower abundance of α -elements, while the thick disk contains predominantly older stars (≳8–12 Gyr) with a higher α ...
Bethany R. Garver +4 more
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Characterisation of the Galactic thick disk [PDF]
Proceedings of the International Astronomical Union, 2013 AbstractThick disks appear to be common in external large spiral galaxies and our own Milky Way also hosts one. The existence of a thick disk is possibly directly linked to the formation history of the host galaxy and if its properties is known it can constrain models of galaxy formation and help us to better understand galaxy formation and evolution ...
openaire +3 more sources
Fractional yields inferred from halo and thick disk stars [PDF]
Serbian Astronomical Journal, 2013 Linear [Q/H]-[O/H] relations, Q = Na, Mg, Si, Ca, Ti, Cr, Fe, Ni, are inferred from a sample (N = 67) of recently studied FGK-type dwarf stars in the solar neighbourhood including different populations (Nissen and Schuster 2010, Ramirez et al ...
Caimmi R.
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Elemental Abundance Survey of The Galactic Thick Disk [PDF]
Mon.Not.Roy.Astron.Soc.367:1329-1366,2006, 2005 [Abridged abstract] We have performed an abundance analysis for 176 F- and G- dwarfs of the Galactic thick disk component. Using accurate radial velocities combined with $Hipparcos$ astrometry, kinematics (U, V, and W) and Galactic orbital parameters were computed. We estimate the probability for a star to belong to the thin disk, the thick disk or the
arxiv +1 more source
Chemo-orbital evidence from SDSS/SEGUE G dwarf stars for a mixed origin of the Galactic thick disk
EPJ Web of Conferences, 2012 About 13,000 G dwarf within ...
van de Ven G., Liu C.
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The Panchromatic Hubble Andromeda Treasury. XX. The Disk of M31 is Thick
The Astronomical Journal, 2023 We present a new approach to measuring the thickness of a partially face-on stellar disk, using dust geometry. In a moderately-inclined disk galaxy, the fraction of reddened stars is expected to be 50% everywhere, assuming that dust lies in a thin ...
Julianne J. Dalcanton +8 more
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