Results 1 to 10 of about 2,548,043 (302)
Stark Broadening of Zn III Spectral Lines
Universe, 2022 Stark widths for spectral lines within 24 multiplets of Zn III singlets and triplets have been calculated using modified semiempirical method for an electron density of 1017 cm−3 and temperatures from 5000 K up to 100,000 K.
Milan S. Dimitrijević +1 more
doaj +1 more source
On the Stark broadening of Ru III spectral lines [PDF]
Bulletin of Natural Sciences Research, 2021 Stark broadening parameters, full widths at half maximum (FWHM) and shifts for spectral lines within six multiplets of doubly charged ruthenium ions have been calculated, for an electron density of 10 17 cm-3 and temperature range from 10 000 K to 160 ...
Dimitrijevć Milan S.
doaj +1 more source
Natural line profile asymmetry
Physica Scripta, 2022 Abstract The paper discusses the line profile asymmetry of the photon scattering process that arises naturally in quantum electrodynamics (QED). Based on precision spectroscopic experiments conducted on hydrogen atoms, we focus our attention on the two-photon 1s − 2s transition.
A Anikin, T Zalialiutdinov, D Solovyev
openaire +2 more sources
Impact of Molecular Spectroscopy on Carbon Monoxide Abundances from TROPOMI
Remote Sensing, 2020 The impact of SEOM–IAS (Scientific Exploitation of Operational Missions–Improved Atmospheric Spectroscopy) spectroscopic information on CO columns from TROPOMI (Tropospheric Monitoring Instrument) shortwave infrared (SWIR) observations was examined ...
Philipp Hochstaffl +7 more
doaj +1 more source
Possibilities of velocity field analysis from Hinode SOT/SP data
Open Astronomy, 2022 The possibility of analyzing the line of sight (LOS) velocity and its gradient at each point of the Hinode SOT/SP maps using bisector analysis is revealed. A technique for obtaining such gradient is described.
Mozharovsky Sergei G.
doaj +1 more source
Stark Broadening of N VI Spectral Lines
Universe, 2023 Stark broadening parameters, line widths and shifts, for 15 N VI multiplets are calculated using semiclassical perturbation theory for temperatures from 50,000 K to 2,000,000 K, and perturber density of 1016 cm−3. As perturbers have been taken electrons,
Milan S. Dimitrijević +2 more
doaj +1 more source
Measured Stark widths and shifts in the O IV spectrum [PDF]
Serbian Astronomical Journal, 2003 Stark widths (W) and shifts (d) of 5 prominent triply ionized oxygen (O IV) spectral lines in 3 multiplets have been measured in oxygen plasma at 42 000 K electron temperature using a linear, low-pressure, pulsed arc discharge as an optically thin plasma
Đeniže Stevan +3 more
doaj +1 more source
Line Profile Variations in AGN [PDF]
International Astronomical Union Colloquium, 1994 AbstractLine-profile variations in the Seyfert galaxies NGC 5548 and NGC 4593 are discussed. The variations of individual line segments are different from line to line and from outburst to outburst.
W. Kollatschny, M. Dietrich
openaire +2 more sources
Line profile variations in Doradus [PDF]
Monthly Notices of the Royal Astronomical Society, 1996 11 pages, 10 figures, accepted to Monthly Notices of the Royal Astronomical ...
Balona, L. A. +13 more
openaire +1 more source
Collective pulsational velocity broadening due to gravity modes as a physical explanation for macroturbulence in hot massive stars [PDF]
, 2009 We aimed at finding a physical explanation for the occurrence of macroturbulence in the atmospheres of hot massive stars, a phenomenon found in observations since more than a decade but yet unexplained.
Aerts +48 more
core +7 more sources