Results 1 to 10 of about 124,357 (214)
Dual-comb thin-disk oscillator [PDF]
Nature Communications, 2022 Achieving high output powers in dual-comb sources is important for possible applications like deep UV high resolution spectroscopy. Here the authors demonstrate a fully passive scheme of generating a set of high-power dual-combs from a thin-disc gain ...
Kilian Fritsch +7 more
doaj +5 more sources
Chemical constraints on the formation of the Galactic thick disk [PDF]
EPJ Web of Conferences, 2012 We highlight some results from our detailed abundance analysis study of 703 kinematically selected F and G dwarf stars in the solar neighbourhood. The analysis is based on spectra of high-resolution (R = 45000 to 110 000) and high signal-to-noise (S/N ...
Feltzing S., Bensby T.
doaj +2 more sources
110 MW Thin-Disk Oscillator [PDF]
EPJ Web of Conferences, 2022 A compact Kerr-lens mode-locked thin-disk oscillator reproducibly delivering 110 MW output peak power, the highest among all oscillators, is reported. This simple and stable femtosecond oscillator delivering a unique combination of high average power (202 W) and peak power, is an ideal driver and an important milestone for the development of extreme ...
Goncharov Semyon +2 more
doaj +4 more sources
Thick-disk evolution induced by the growth of an embedded thin disk [PDF]
Astrophys.J.718:314-330,2010, 2009 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. The thick disks used in the present study originate from cosmologically-common 5:1 encounters between initially-thin primary disk galaxies and infalling satellites.
Stelios Kazantzidis +2 more
arxiv +7 more sources
Lick Indices in the Thin and Thick Disks of Edge-On Disk Galaxies [PDF]
The Astrophysical Journal, 2008 We have measured Lick index equivalent widths to derive luminosity weighted stellar ages and metallicities for thin and thick disk dominated regions of 9 edge-on disk galaxies with the ARC 3.5 meter telescope at Apache Point Observatory. In all cases, the thick disks are confirmed to be old stellar populations, with typical ages between 4 and 10 Gyr ...
Peter Yoachim +2 more
arxiv +7 more sources
Hydrodynamical activity in thin accretion disks [PDF]
New Astron.Rev.51:819-827,2008, 2008 An asymptotic treatment of thin accretion disks, introduced by Klu\'zniak & Kita (2000) for a steady-state disk flow, is extended to a time-dependent problem. Transient growth of axisymmetric disturbances is analytically shown to occur on the global disk scale.
Oded Regev, Oded Regev
arxiv +6 more sources
Structural Parameters of Thin and Thick Disks in Edge-On Disk Galaxies [PDF]
Astron.J.131:226-249,2006, 2005 We analyze the global structure of 34 late-type, edge-on, undisturbed, disk galaxies spanning a wide range of mass. We measure structural parameters for the galaxies using two-dimensional least-squares fitting to our $R$-band photometry. The fits require both a thick and a thin disk to adequately fit the data.
Peter Yoachim +2 more
arxiv +5 more sources
Are there thin accretion disks?
, 2004 Total and internal energy requirements set constraints on the allowable temperature on the disk. In a gas pressure dominated disk, they lead to a cooling rate that decreases with temperature. These findings are used to show that the flow is mildly supersonic, with the azimuthal Mach number moderately exceeding one in a large extent of the disk. Only in
Cesar Meirelles Filho +2 more
openalex +4 more sources
Abundance trends in the thin and thick disks [PDF]
, 2004 Review article presented at the ESO-ARCETRI workshop on: Chemical Abundances and Mixing in Stars in the Milky Way and its Satellites (September 13-17 2004), To be published in "ESO Astrophysics Symposia", Editors: Luca Pasquini and Sofia Randich, 6 pages, 4 figures (one in colour)
S. Feltzing
openalex +5 more sources
High-efficiency 100-W Kerr-lens mode-locked Yb:YAG thin-disk oscillator
Frontiers in Physics, 2023 We demonstrate a Kerr-lens mode-locked femtosecond Yb:YAG thin-disk oscillator and investigate the approach to increase the optical-to-optical efficiency based on the scheme of direct multiple passes of the laser beam through the thin-disk medium.
Hongshan Chen +13 more
doaj +1 more source