Results 71 to 80 of about 1,109,137 (355)
Elemental Abundance Survey of The Galactic Thick Disk
, 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 ...
Lambert, David L. +2 more
core +2 more sources
The Thick Disk in the Galaxy NGC 4244 from S^4G Imaging [PDF]
, 2010 If thick disks are ubiquitous and a natural product of disk galaxy formation and/or evolution processes, all undisturbed galaxies that have evolved during a significant fraction of a Hubble time should have a thick disk. The late-type spiral galaxy NGC
Athanassoula, E. +18 more
core +5 more sources
POPULATION STUDIES. XIII. A NEW ANALYSIS OF THE BIDELMAN–MACCONNELL “WEAK-METAL” STARS—CONFIRMATION OF METAL-POOR STARS IN THE THICK DISK OF THE GALAXY [PDF]
, 2014 A new set of very high signal-to-noise (S/N > 100/1), medium-resolution (R ∼ 3000) optical spectra have been obtained for 302 of the candidate “weak-metal” stars selected by Bidelman & MacConnell.
T. Beers +6 more
semanticscholar +1 more source
Isotopic Titanium Abundances in Local M Dwarfs [PDF]
, 2009 Relative abundances of the five stable isotopes of titanium (^46Ti to ^50Ti) are measured for 11 M dwarfs belonging to the thin disk (four stars), thick disk (three stars), the halo (one star), and either the thick or the thin disk (three stars).
Asplund +30 more
core +2 more sources
THE MILKY WAY AS A HIGH-REDSHIFT GALAXY: THE IMPORTANCE OF THICK DISK FORMATION IN GALAXIES [PDF]
, 2014 We compare the star formation history and dynamics of the Milky Way (MW) with the properties of distant disk galaxies. During the first ∼4 Gyr of its evolution, the MW formed stars with a high star formation intensity (SFI), ΣSFR ≈ 0.6 M☉ yr−1 kpc−2 and ...
M. Lehnert +3 more
semanticscholar +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.
doaj +1 more source
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
doaj +1 more source
, 2011 We employ measurements of the [alpha/Fe] ratio derived from low-resolution (R~2000) spectra of 17,277 G-type dwarfs from the SEGUE survey to separate them into likely thin- and thick-disk subsamples.
Abadi +55 more
core +1 more source
Indications of M-Dwarf Deficits in the Halo and Thick Disk of the Galaxy [PDF]
, 2014 We compared the number of faint stars detected in deep survey fields with the current stellar distribution model of the Galaxy and found that the detected number in the H band is significantly smaller than the predicted number.
M. Konishi +57 more
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView.Incorporating nanosized silver into titanium for antimicrobial materials exploits the metastable miscibility gap between silver and titanium. Silver nanoparticles are synthesized via pulsed laser ablation in liquid. Silver addition refines the microstructure, increases hardness by 30%, and reduces Staphylococcus capitis microbial adhesion by 70%, with ...
Hamed Shokri +4 more
wiley +1 more source