Results 51 to 60 of about 2,101,430 (372)

Lick Indices in the Thin and Thick Disks of Edge‐On Disk Galaxies [PDF]

The Astrophysical Journal, 2008
14 pages, 10 figures, accepted for publication in ...
Peter Yoachim, Peter Yoachim, Julianne J. Dalcanton   +2 more
openaire   +5 more sources

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, F. Saltarelli, I. Graumann, C. Saraceno, C. Phillips, U. Keller   +5 more
semanticscholar   +1 more source

Formation and Evolution of the Disk System of the Milky Way: [alpha/Fe] Ratios and Kinematics of the SEGUE G-Dwarf Sample

, 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, Abazajian, Aihara, Allende Prieto, An, An, An, Andreas Just, Bond, Brian Yanny, Brook, Brook, Brook, Carollo, Casetti-Dinescu, Chiba, Constance M. Rockosi, Deokkeun An, Dierickx, Fuhrmann, Gilmore, Girard, Girard, Heather L. Morrison, Helio J. Rocha-Pinto, Ivezić, Jenkins, Jennifer A. Johnson, Jonathan Bird, Kazantzidis, Lee, Lee, Lee, Loebman, Minchev, Munn, Munn, Parker, Paul Harding, Ralph Schönrich, Reddy, Roškar, Roškar, Schlesinger, Sesar, Smolinski, Steinmetz, Timothy C. Beers, Villalobos, Wyse, Yanny, York, Yoshii, Young Sun Lee, Zwitter, Željko Ivezić   +55 more
core   +1 more source

The Stellar Population of the Thin Disk [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractWe discuss recent observations of stars located close to the symmetry plane of the Milky Way, and examine them in the context of theories of Galaxy formation and evolution. The kinematics, ages, and compositions of thin disk stars in the solar neighborhood display complex patterns, and interesting correlations.
openaire   +3 more sources

Status of the High Average Power Diode-Pumped Solid State Laser Development at HiLASE

Applied Sciences, 2015
An overview of the latest developments of kilowatt-level diode pumped solid state lasers for advanced applications at the HiLASE Centre is presented. An overview of subcontracted and in-house-developed laser beamlines is presented. The aim of development
Ondřej Novák, Taisuke Miura, Martin Smrž, Michal Chyla, Siva Sankar Nagisetty, Jiří Mužík, Jens Linnemann, Hana Turčičová, Venkatesan Jambunathan, Ondřej Slezák, Magdalena Sawicka-Chyla, Jan Pilař, Stefano Bonora, Martin Divoký, Jakub Měsíček, Alina Pranovich, Pawel Sikocinski, Jaroslav Huynh, Patricie Severová, Petr Navrátil, David Vojna, Lucie Horáčková, Klaus Mann, Antonio Lucianetti, Akira Endo, Danijela Rostohar, Tomáš Mocek   +26 more
doaj   +1 more source

Oxygen Abundances in Nearby FGK Stars and the Galactic Chemical Evolution of the Local Disk and Halo [PDF]

, 2013
Atmospheric parameters and oxygen abundances of 825 nearby FGK stars are derived using high-quality spectra and a non-LTE analysis of the 777 nm O I triplet lines. We assign a kinematic probability for the stars to be thin-disk (P1), thick-disk (P2), and
Lambert, D. L., Prieto, C. Allende, Ramirez, I.   +2 more
core   +2 more sources

Cr:ZnSe thin disk cw laser [PDF]

SPIE Proceedings, 2013
Abstract: A Thulium fiber laser pumped or diode laser stack pumped Cr:ZnSe thin disk cw InP multimode laser at 2.4 µm with an output power of 5 and 4 W, respectively, and - with optical-tooptical efficiencies of 10% will be presented. An experimentally verified and numerically simulated thermal lens ing induced and cyclic instability in the laser ...
Renz, Günther, Speiser, Jochen, Giesen, Adolf, Sorokina, Irina, Sorokin, Evgeni   +4 more
openaire   +3 more sources

Kinematic and chemical components in the solar neighbourhood

EPJ Web of Conferences, 2012
Abundance data on solar neighbourhood stars suggest the presence of chemically-distinct stellar components in the solar neighbourhood. When the abundances of Fe, α elements, and the r-process element Eu are considered together, stars separate neatly into
Navarro J.F.
doaj   +1 more source

Carrier-Envelope Offset Frequency Stabilization of a Thin-Disk Laser Oscillator via Depletion Modulation

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, Norbert Modsching, Ayhan Tajalli, Christian M. Dietrich, Sven Kleinert, Fabian Placzek, Bernhard Kreipe, Stephane Schilt, Valentin J. Wittwer, Thomas Sudmeyer, Uwe Morgner   +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, Allende Prieto, Bekki, Bekki, Bekki, Bensby, Binney, Binney, Brook, Carollo, Chiappini, Chiba, Dierickx, Dinescu, Edvardsson, Frogel, Fuhrmann, Gilmore, Gilmore, Gratton, Huang, Humphreys, Ivezić, Jurić, Karataş, Kazantzidis, Kenji Bekki, Larsen, Larsen, Lee, Loebman, Parker, Prochaska, Reddy, Reddy, Robin, Roškar, Ruchti, Takuji Tsujimoto, Tsujimoto, Tsujimoto, Villalobos, Yoachim, Yoshii   +43 more
core   +1 more source