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- Centre National de la Recherche ScientifiqueFR6 papers
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8 papers · 1 filter
Effect of Anisotropic Collisions on Solar Scattering Polarization
Saleh Qutub, Moncef Derouich, Badruddin Zaheer Ahmad
Scattering of anisotropic radiation by atoms, ions or molecules is sufficient to generate linear polarization observable in stars and planets atmospheres, circumstellar environment…
Effect of the isotropic collisions with neutral hydrogen on the polarization of the CN solar molecule
S. Qutub, M. Derouich, Y. N. Kalugina +2
Our work is concerned with the case of the solar molecule CN which presents conspicuous profiles of scattering polarization. We start by calculating accurate PES for the singlet an…
Scattering polarization of the -states of ions and solar magnetic field: Effects of isotropic collisions
M. Derouich, H. Basurah, B. Badruddin
Analysis of solar magnetic fields using observations as well as theoretical interpretations of the scattering polarization is commonly designated as a high priority area of the sol…
Inversion of Zeeman polarization for solar magnetic field diagnostics
M. Derouich
The topic of magnetic field diagnostics with the Zeeman effect is currently vividly discussed. There are some testable inversion codes available to the spectropolarimetry community…
General model of depolarization and transfer of polarization of singly ionized atoms by collisions with hydrogen atoms
Moncef Derouich
Simulations of the generation of the atomic polarization is necessary for interpreting the second solar spectrum. For this purpose, it is important to rigorously determine the effe…
A unified numerical model of collisional depolarization and broadening rates due to hydrogen atom collisions
M. Derouich, A. Radi, P. S. Barklem
Interpretation of solar polarization spectra accounting for partial or complete frequency redistribution requires data on various collisional processes. Data for depolarization and…