Results 1 to 10 of about 221,035 (206)

Thick disk kinematics from RAVE and the solar motion [PDF]

open access: yesEPJ Web of Conferences, 2012
We present a method to derive kinematic parameters for the Galactic thick disk based on stellar radial velocity data alone, without previous knowledge of distances.
Pasetto S., Grebel E.K.
doaj   +3 more sources

Thick-disk evolution induced by the growth of an embedded thin disk [PDF]

open access: yes, 2010
We perform collisionless N-body simulations to investigate the evolution of the structural and kinematical properties of simulated thick disks induced by the growth of an embedded thin disk.
Amina Helmi   +52 more
core   +11 more sources

Vertical Density Distribution of the Galaxy from Star Count Analysis [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2002
The five space density distribution D(z) with distance perpendicular to the Galactic plane were combined. The scale heights and the local densities at z = 0 of the thin disk, thick disk, and the halo components were estimated from the nonlinear least ...
Young-Jong Sohn
doaj   +1 more source

Black Hole Accretion with Saturated Magnetic Pressure and Disk Wind

open access: yesThe Astrophysical Journal, 2023
We construct an analytical black hole accretion disk model that incorporates both magnetic pressure and disk wind, which are found to be important from numerical simulations.
Jiahui Huang   +3 more
doaj   +1 more source

The Physical Thickness of Stellar Disks to z ∼ 2

open access: yesThe Astrophysical Journal, 2023
In local disk galaxies such as our Milky Way, older stars generally inhabit a thicker disk than their younger counterparts. Two competing models have attempted to explain this result: one in which stars first form in thin disks that gradually thicken ...
Kathleen A. Hamilton-Campos   +4 more
doaj   +1 more source

THE MAGNESIUM ABUNDANCE IN THE THIN AND THICK DISK OF THE GALAXY

open access: yesOdessa Astronomical Publications, 2017
The chemical evolution of the thin and thick disk of our Galaxy was investigated in framework of the opened model with gas inflow. It was supposed that the thin and thick disks separate chemically and spatially and have different evolution timescales ...
T. V. Nykytyuk, T. V. Mishenina
doaj   +1 more source

High-resolution Chemical Abundances of the Nyx Stream

open access: yesThe Astrophysical Journal, 2023
Nyx is a nearby, prograde, and high-eccentricity stellar stream physically contained in the thick disk, but its origin is unknown. Nyx could be the remnant of a disrupted dwarf galaxy, in which case the associated dark matter substructure could affect ...
Shuyu Wang   +7 more
doaj   +1 more source

Milky Way's Thick and Thin disk: Is there distinct thick disk? [PDF]

open access: yes, 2016
This article is based on our discussion session on Milky Way models at the 592 WE-Heraeus Seminar, Reconstructing the Milky Way's History: Spectroscopic Surveys, Asteroseismology and Chemodynamical models. The discussion focused on the following question:
Chiappini, C., Kawata, D.
core   +2 more sources

Impact of the Accretion Disk Thickness on the Polarization of the Thermal Emission from Stellar Mass Black Holes

open access: yesThe 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
doaj   +1 more source

Ultrasonic fragmentation for removing thick organized clots during diabetic vitrectomy – A novel technique

open access: yesIndian 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

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