Results 81 to 90 of about 277,210 (229)

Non-LTE Sodium Abundance in Galactic Thick- and Thin-Disk Red Giants

, 2014
We evaluate non-local thermodynamical equilibrium (non-LTE) line formation for neutral sodium in model atmospheres of the 79 red giants using the model atom that incorporates the best available atomic data.
Alexeeva, S. A., Mashonkina, L. I., Pakhomov, Yu. V.   +2 more
core   +1 more source

High-Power Thin-Disk Lasers

Advanced Solid-State Photonics, 2007
The current status of the thin disk laser technology will be given for cw-operation and for pulsed-mode operation. Also the scaling laws and the scaling limits will be discussed in detail.
openaire   +4 more sources

The Ages of the Thin Disk, Thick Disk, and the Halo from Nearby White Dwarfs

, 2017
We present a detailed analysis of the white dwarf luminosity functions derived from the local 40 pc sample and the deep proper motion catalog of Munn et al (2014, 2017).
DeGennaro, Steven, Harris, Hugh C., Jeffery, Elizabeth, Kilic, Mukremin, Liebert, James W., Munn, Jeffrey A., von Hippel, Ted, Williams, Kurtis A.   +7 more
core   +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., Chiang, James, Reynolds, Christopher S.   +2 more
core   +3 more sources

Kinematics of Stellar Populations with RAVE Data

, 2011
We study the kinematics of the Galactic thin and thick disk populations using stars from the RAVE survey's second data release together with distance estimates from Breddels et al. (2009).
Abadi, Allende Prieto, Arifyanto, Bensby, Breddels, Brook, Carney, Carollo, Carollo, Chiappini, Chiappini, Chiba, Croswell, Cui, Dierickx, Edvardsson, Francis, Frenk, Gilmore, Girard, Grenon, Gunn, Hernquist, Holmberg, Johnson, Johnston, Juric, Karatas, Kerr, Klement, Klement, Miyamoto, Murray, Nissen, Nordström, Norris, Norris, Ojha, Quinn, Rainer J. Klement, Robin, Roškar, Ruchti, Sales, Schuster, Schuster, Schönrich, Seabroke, Skuljan, Soubiran, Steinmetz, Vallenari, Velazquez, Veltz, Wilson, Wyse, Yüksel Karataş, Zhao, Zwitter   +58 more
core   +1 more source

Kinematics of Cataclysmic Variables in the Solar Neighborhood in the Gaia Era

The Astronomical Journal
Using high-precision astrometric data from Gaia DR3 and updated systemic velocities from the literature, the kinematical properties of cataclysmic variables (CVs) were investigated. By constraining the data according to the total space velocity error and
Remziye Canbay, Tansel AK, Selçuk Bilir, Faruk Soydugan, Zeki Eker   +4 more
doaj   +1 more source

Extracting Energy from a Black Hole through Its Disk

, 2000
When some magnetic field lines connect a Kerr black hole with a disk rotating around it, energy and angular momentum are transferred between them. If the black hole rotates faster than the disk, $ca/GM_H>0.36$ for a thin Keplerian disk, then energy and ...
Blandford R. D., Blandford R. D., Illarionov A. F., Li-Xin Li, Macdonald D.   +4 more
core   +2 more sources

Abundances of Chemical Elements in Open Star Clusters as Indicators of their Nature

Open Astronomy, 2015
Applying a compilled catalog, we find that the relative abundances of α-elements in open clusters and in field stars of the thin disk of the Galaxy show different dependencies on metallicity, age and parameters of their Galactic orbits.
Marsakov V. A., Gozha M. L., Koval’ V. V., Shpigel’ L. V.   +3 more
doaj   +1 more source

400 W average power Q-switched Yb:YAG thin-disk-laser. [PDF]

Sci Rep, 2022
Radmard S, Moshaii A, Pasandideh K.
europepmc   +1 more source

The Kinematics of Thick Disks in External Galaxies

, 2005
We present kinematic measurements of the thick and thin disks in two edge-on galaxies. We have derived stellar rotation curves at and above the galaxies' midplanes using Ca II triplet features measured with the GMOS spectrograph on Gemini North.
Bottema R., Buser R., de Grijs R., Fall S. M., Gilmore G., Julianne J. Dalcanton, Karachentsev I. D., Karachentsev I. D., Matteucci F., Nissen P. E., Peter Yoachim, Rix H., Robin A. C., Shaw M. A., Simkin S. M., van der Kruit P. C., van Dokkum P. G.   +16 more
core   +1 more source