Results 21 to 30 of about 791,277 (228)
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
Nomogram for the Evaluation of Blackbody Radiancy and of Peak and Total Intensities for Spectral Lines with Doppler Contour [PDF]
, 1953 A nomogram has been constructed for the determination of blackbody radiancy and of peak and total intensities for spectral lines with Doppler contour. The basic equations used for the construction of the nomogram and the use of the nomogram are described
Björnerud, E. K. +2 more
core +2 more sources
Remote Sensing, 2023 Non-Gaussian impulsive noise in marine environments strongly influences the detection of weak spectral lines. However, existing detection algorithms based on the Gaussian noise model are futile under non-Gaussian impulsive noise.
Zhen Li, Junyuan Guo, Xiaohan Wang
doaj +1 more source
Analysis of Infrared Spectral Radiance of O2 1.27 μm Band Based on Space-Based Limb Detection
Remote Sensing, 2023 The infrared spectral radiance of O2 is of great significance for space-based infrared detection. In this work, based on the demand for near-infrared spectral radiance of O2 limb detection, a method of spectral radiance calculation coupled with an ...
Jingyu Bai +4 more
doaj +1 more source
Application of high optical technologies to determine the temperature field, ingredient composition and microstructure of the dispersed phase of combustion products of energy fuels [PDF]
E3S Web of Conferences, 2020 Application of high optical technologies for determining the temperature field, ingredient composition and microstructure of the dispersed phase of combustion products of power fuels is considered. The temperature of the combustion products is determined
Moskalenko Nikolay +2 more
doaj +1 more source
Turbulence Spectra from Doppler-shifted Spectral Lines [PDF]
, 2006 Turbulence is a key element of the dynamics of astrophysical fluids, including those of interstellar medium, clusters of galaxies and circumstellar regions. Turbulent motions induce Doppler shifts of observable emission and absorption lines.
Lazarian, A.
core +3 more sources
INVESTIGATION OF THE DAMPING CONSTANT OF FRAUNHOFER'S LINES IN SOLAR ATMOSPHERE
Odessa Astronomical Publications, 2017 To define chemical contents of elements in stars' atmospheres we need reliable data on their damping in spectral lines. We have found distinct expressions for damping constant with consideration of several mechanisms that in the expansion of spectral ...
L. Yankiv-Vitkovska
doaj +1 more source
Magnetic Field Information in the Near-ultraviolet Fe ii Lines of the CLASP2 Space Experiment
The Astrophysical Journal, 2023 We investigate theoretically the circular polarization signals induced by the Zeeman effect in the Fe ii lines of the 279.3–280.7 nm spectral range of the CLASP2 space experiment and their suitability to infer solar magnetic fields. To this end, we use a
David Afonso Delgado +2 more
doaj +1 more source
Intermediate Resolution Near-Infrared Spectroscopy of 36 late-M Dwarfs
, 2012 We present observations of 36 late-M dwarfs obtained with the KeckII/NIRSPEC in the J-band at a resolution of \sim20,000. We have measured projected rotational velocities, absolute radial velocities, and pseudo-equivalent widths of atomic lines.
Allen +54 more
core +1 more source
EngIn this study, we explored the correlation between fluctuated waveform tails under both positive and negative impulse voltages and their corresponding spectral lines during millisecond observations of arc discharge. We examined impulse voltages in ±100, ±
Muhammad Ikhwanus, Takeshi Morimoto
doaj +1 more source