Results 21 to 30 of about 999,597 (267)

Analysis of Infrared Spectral Radiance of O2 1.27 μm Band Based on Space-Based Limb Detection

open access: yesRemote 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]

open access: yesE3S 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

INVESTIGATION OF THE DAMPING CONSTANT OF FRAUNHOFER'S LINES IN SOLAR ATMOSPHERE

open access: yesOdessa 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

Review of Recent Advances in the Analytical Theory of Stark Broadening of Hydrogenic Spectral Lines in Plasmas: Applications to Laboratory Discharges and Astrophysical Objects

open access: yesAtoms, 2018
There is presented an overview of the latest advances in the analytical theory of Stark broadening of hydrogenic spectral lines in various types of laboratory and astrophysical plasmas.
Eugene Oks
doaj   +1 more source

Magnetic Field Information in the Near-ultraviolet Fe ii Lines of the CLASP2 Space Experiment

open access: yesThe 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

Selective excitation of homogeneous spectral lines

open access: yes, 2010
It is possible, for homogeneously broadened lines, to excite selectively the response signals, which are orders of magnitude narrower than the original lines.
A. K. Khitrin   +3 more
core   +1 more source

Library of high-resolution UES echelle spectra of F, G, K and M field dwarf stars [PDF]

open access: yes, 1997
We present a library of Utrecht echelle spectrograph (UES) observations of a sample of F, G, K and M field dwarf stars covering the spectral range from 4800 AA to 10600 AA with a resolution of 55000.
Martin, E. L., Montes, D.
core   +2 more sources

Nomogram for the Evaluation of Blackbody Radiancy and of Peak and Total Intensities for Spectral Lines with Doppler Contour [PDF]

open access: yes, 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

Contribution of Metastable Oxygen Spectra to Fluctuated Waveform Tails after Breakdown Time in Air under Positive and Negative Impulse Voltages

open access: yesEng
In 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

Stark Broadening of In III Lines in Astrophysical and Laboratory Plasma

open access: yesOpen Astronomy, 2011
In the deeper layers of hot stellar photospheres the Stark widths of spectral lines can be comparable and even larger than the thermal Doppler widths.
Simić Z.   +3 more
doaj   +1 more source

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