Results 41 to 50 of about 1,109,137 (355)
Indian Journal of Ophthalmology, 2022 A 65-year-old male with proliferative diabetic retinopathy (PDR) and non-clearing vitreous hemorrhage underwent 25G pars plana vitrectomy (PPV). A large disk of thick organized blood of 5 disk diameter (DD) size was encountered in subhyaloid space.
Deependra V Singh +3 more
doaj +1 more source
A RADIAL AGE GRADIENT IN THE GEOMETRICALLY THICK DISK OF THE MILKY WAY [PDF]
, 2016 In the Milky Way, the thick disk can be defined using individual stellar abundances, kinematics, or age, or geometrically, as stars high above the midplane.
M. Martig +4 more
semanticscholar +1 more source
The Galactic thin and thick disk [PDF]
Astronomische Nachrichten, 2012 AbstractThe ongoing large spectroscopic surveys of the Milky Way such as SEGUE and RAVE have enabled us to take a fresh look at the structure of the Galactic thin and thick disks, and how their structure fits within the framework of structure formation via hierarchical clustering. In this article I will summarize some recent results mainly based in the
openaire +3 more sources
Chemical constraints on the formation of the Galactic thick disk
EPJ Web of Conferences, 2012 We highlight some results from our detailed abundance analysis study of 703 kinematically selected F and G dwarf stars in the solar neighbourhood. The analysis is based on spectra of high-resolution (R = 45000 to 110 000) and high signal-to-noise (S/N ...
Feltzing S., Bensby T.
doaj +1 more source
The Astrophysical Journal, 2023 We explore reprocessing models for a sample of 17 hypervariable quasars, taken from the Sloan Digital Sky Survey Reverberation Mapping project, which all show coordinated optical luminosity hypervariability with amplitudes of factors ≳2 between 2014 and ...
Tatsuya Akiba +7 more
doaj +1 more source
Detailed chemical abundance analysis of the thick disk star cluster Gaia 1 [PDF]
, 2017 Star clusters, particularly those objects in the disk-bulge-halo interface are as of yet poorly charted, albeit carrying important information about the formation and the structure of the Milky Way. Here, we present a detailed chemical abundance study of
A. Koch, T. Hansen, A. Kunder
semanticscholar +1 more source
Probing the distinct chemical history of the Milky Way halo and old thick disk through HESP-GOMPA survey [PDF]
EPJ Web of ConferencesRecent studies of the time-resolved Milky Way formation using asteroseismology have shown that thick disk stars could be very old (0.8 Gyr after the Big Bang, even older than the inner halo).
Saraf Pallavi +2 more
doaj +1 more source
Vertical Structure of the Milky Way Disk with Gaia DR3
Galaxies, 2023 Using a complete sample of about 330,000 dwarf stars, well measured by Gaia DR3, limited to the galactic north and south solid angles |b|700 pc and points to the presence of more stars beyond the thin disk that cannot be accounted for by the two-disk ...
Katherine Vieira +3 more
doaj +1 more source
Cannibals in the thick disk: the young α-rich stars as evolved blue stragglers [PDF]
, 2016 This work was partly supported by the European Union FP7 programme through ERC grant number 320360. P.J. acknowledges King’s College Cambridge for partially supporting this work. K.H.
P. Jofre +12 more
semanticscholar +1 more source
Beryllium and the formation of the Thick Disk and of the Halo [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractWe use Beryllium to investigate star formation in the early Galaxy. Be has been demonstrated to be a good indicator of time in these early epochs. By analyzing the so-far largest sample of halo and thick disk metal poor stars, we find a clear scatter in Be for a given value of [Fe/H] and [O/H].
Pasquini, Luca +5 more
openaire +4 more sources