Results 51 to 60 of about 2,153,493 (386)
, 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
Turbulent convection in thin accretion disks [PDF]
The Astrophysical Journal, 1995 38 pages including 1 PostScript ...
Goldman, Itzhak, Wandel, Amri
openaire +2 more sources
Thin accretion disk around a four-dimensional Einstein-Gauss-Bonnet black hole [PDF]
Chinese Physics C, High Energy Physics & Nuclear Physics, 2020 Recently, a novel four-dimensional Einstein-Gauss-Bonnet (4EGB) theory of gravity was proposed by Glavan and Lin [D. Glavan and C. Lin, Phys. Rev. Lett.
C. Liu 刘, T. Zhu 朱, Qiang 强 Wu 武
semanticscholar +1 more source
Gas-lens effect in kW-class thin-disk lasers.
Optics Express, 2018 We unveil a gas-lens effect in kW-class thin-disk lasers, which accounts in our experiments for 33% of the overall disk thermal lensing. By operating the laser in vacuum, the gas lens vanishes. This leads to a lower overall thermal lensing and hence to a
A. Diebold +5 more
semanticscholar +1 more source
Observational signatures of strongly naked singularities: image of the thin accretion disk [PDF]
The European Physical Journal C, 2020 We study the optical appearance of a thin accretion disk around the strongly naked static Janis–Newman–Winicour singularity. The solution does not possess a photon sphere, which results in the formation of a complex structure of bright rings in the ...
G. Gyulchev +4 more
semanticscholar +1 more source
Magnetohydrodynamic simulations of black hole accretion [PDF]
, 2001 We discuss the results of three-dimensional magnetohydrodynamic simulations, using a pseudo-Newtonian potential, of thin disk (h/r ~ 0.1) accretion onto black holes.
Armitage, Philip J. +2 more
core +3 more sources
IEEE Photonics Journal, 2020 We present a novel concept for the stabilization of the carrier-envelope offset (CEO) frequency of femtosecond pulse trains from thin-disk laser oscillators by exploiting gain depletion modulation in the active gain region.
Jose R. C. Andrade +10 more
doaj +1 more source
Origin of chemical and dynamical properties of the Galactic thick disk
, 2011 We adopt a scenario in which the Galactic thick disk was formed by minor merging between the first generation of the Galactic thin disk (FGTD) and a dwarf galaxy about 9 Gyr ago and thereby investigate chemical and dynamical properties of the Galactic ...
Abadi +43 more
core +1 more source
The Geneva-Copenhagen Survey of the Solar neighbourhood II. New uvby calibrations and rediscussion of stellar ages, the G dwarf problem, age-metallicity diagram, and heating mechanisms of the disk [PDF]
, 2007 Ages, metallicities, space velocities, and Galactic orbits of stars in the Solar neighbourhood are fundamental observational constraints on models of galactic disk evolution.
Allende Prieto +56 more
core +1 more source
Generation of 35-fs pulses from a Kerr lens mode-locked Yb:Lu2O3 thin-disk laser.
Optics Express, 2017 We investigate Kerr lens mode locking of Yb:Lu2O3 thin-disk laser oscillators operating in the sub-100-fs regime. Pulses as short as 35 fs were generated at an average output power of 1.6 W. These are the shortest pulses directly emitted from a thin-disk
C. Paradis +5 more
semanticscholar +1 more source