Results 81 to 90 of about 1,109,137 (355)
Unveiling a Young Thick Disk in the Milky Way
The Astrophysical Journal LettersThe thickness of a galaxy’s disk provides a valuable probe of its formation and evolution history. Observations of the Milky Way and local galaxies have revealed an ubiquitous disk structure with two distinctive components: an old thick disk and a ...
Jianhui Lian +7 more
doaj +1 more source
IEEE Photonics Journal, 2015 It has been demonstrated that, in the terahertz (THz) waveband, disk scattering slab modes (DSSMs) can exist in a heterostructure composed of a metallic subwavelength disk array coated on one surface of a dielectric slab.
Wei Wang +4 more
doaj +1 more source
, 2013 We analyze high quality abundances data of solar neighborhood stars and show that there are two distinct regimes of [alpha/Fe] versus age which we identify as the epochs of the thick and thin disk formation.
Di Matteo, P. +4 more
core +2 more sources
Advanced Engineering Materials, EarlyView.This study investigates the bond quality of co‐extruded aluminum–titanium hybrid profiles, focusing on the lateral angular co‐extrusion (LACE) process. It examines how heat treatments (HT) affect intermetallic phase formation, bond strength, and material properties.
Norman Mohnfeld +9 more
wiley +1 more source
Subsystems of the Galactic halo, their structures and compositions
Odessa Astronomical Publications, 2017 It is shown that general populations of globular clusters and metal-poor field stars are components at least of three subsystems occupying different volumes in the Galaxy.
V. A. Marsakov, T. V. Borkova
doaj +1 more source
3D kinematics of white dwarfs from the SPY project [PDF]
, 2003 Original article can be found at: http://www.aanda.org/--Copyright The European Southern ObservatoryWe present kinematics of a sample of 107 DA white dwarfs from the SPY project (ESO SN Ia Progenitor surveY) and discuss kinematic criteria for a ...
Altmann, M. +5 more
core +2 more sources
Advanced Engineering Materials, EarlyView.Hydrostatic bearings excel in high‐precision applications, but their performance hinges on a continuous external supply. This study evaluates various material combinations for sliding surfaces to mitigate damage during supply failures or misalignment and to discover the most effective materials identified for enhancing the reliability and efficiency of
Michal Michalec +6 more
wiley +1 more source
Graphene overcoats for ultra-high storage density magnetic media
Nature Communications, 2021 The main limitation to the areal storage density of hard disk drives (HDDs) is the thickness of carbon overcoats protecting the disk media. Here,
N. Dwivedi +18 more
doaj +1 more source
CHEMICAL ABUNDANCES OF THE MILKY WAY THICK DISK AND STELLAR HALO. II. SODIUM, IRON-PEAK, AND NEUTRON-CAPTURE ELEMENTS [PDF]
, 2013 We present chemical abundance analyses of sodium, iron-peak, and neutron-capture elements for 97 kinematically selected thick disk, inner halo, and outer halo stars with metallicities −3.3 < [Fe/H] −1.5 support the hypothesis that these components formed
M. Ishigaki, W. Aoki, M. Chiba
semanticscholar +1 more source
Lithium-rich giants in the Galactic thick disk [PDF]
Astronomy & Astrophysics, 2011 11 pages, 7 tables, 7 figures.
Oscar A. Gonzalez +9 more
openaire +10 more sources