Results 31 to 40 of about 105,508 (303)
The Astrophysical Journal, 2023 The Imaging X-ray Polarimetry Explorer, launched in 2021 December, enables precision measurements of the energy-dependent polarization of the X-ray emission from stellar mass and supermassive black holes.
Andrew Thomas West, Henric Krawczynski
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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
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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
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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
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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
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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
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Nonextensive Behavior of Stellar Rotation in the Galactic Disk Components
The Astrophysical Journal, 2023 The solar neighborhood is a unique stellar astrophysical laboratory formed by a variety of stars from different origins. In particular, two of the most notable populations known are the thick and thin disk stars, each characterized by distinct chemical ...
M. P. da Silva +3 more
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The Asymmetric Drift of the Thick Disk Population [PDF]
Symposium - International Astronomical Union, 1995 We investigate the kinematics of the thick disk population using photometric and astrometric sample surveys towards two opposite directions at intermediate latitude. A multivariate discriminant analysis (MDA) is used to distinguish the ‘Thick Disk’ from other populations with the help of the Besançon model of population synthesis.
Olivier Bienaymé +2 more
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Origins of the thick disk of the galaxy as traced by metal-poor stars selected from RAVE
EPJ Web of Conferences, 2012 Models of the formation of the thick disk of the Milky Way Galaxy make specific predictions about the chemical abundance properties of the metal-weak (and oldest) stellar population in the thick disk.
Ruchti G.R.
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Exact general relativistic thick disks [PDF]
Physical Review D, 2004 11 pages, RevTex, 9 eps figs.
Patricio S. Letelier +1 more
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