Results 21 to 30 of about 35,353 (312)
The link between outgoing longwave radiation and the altitude at which a spaceborne lidar beam is fully attenuated [PDF]
Atmospheric Measurement Techniques, 2017 According to climate model simulations, the changing altitude of middle and high clouds is the dominant contributor to the positive global mean longwave cloud feedback.
T. Vaillant de Guélis +6 more
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Adaptive Algorithm for the Generation of Superconfigurations in Hot-Plasma Opacity Calculations
Plasma, 2022 In hot plasmas, such as the ones encountered in astrophysics or laser-fusion studies, the number of ionic excited states may become huge, and the relevant electron configurations cannot always be handled individually.
Jean-Christophe Pain
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Radiative transfer and opacity calculations
, 1964 The similarity groups for multicomponent, reacting gas mixtures with radiative energy transport are derived. The resulting relations are used to consider the feasibility of scaling for flow processes with radiative energy transport under highly simplified conditions.
Mitchell Thomas
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The Radiative Transfer in Accretion Discs with Linear Plank Function: Role of Scattering Effect [PDF]
Iranian Journal of Astronomy and Astrophysics, 2020 Radiative transfer in a geometrically thin accretion disc with fnite optical depth is considered under the plane-parallel approximation. The Eddington factor that is defned as the ratio of the mean intensity to radiation stress tensor, is assumed be ...
Fahimeh Habibi, Maryam Samadi
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Opacity Sampling in Radiative Acceleration Calculations [PDF]
The Astrophysical Journal, 2000 The accuracy requirements on atomic data for the calculation of stellar evolution with atomic diffusion are determined. In particular, the density of frequency grids needed for precise radiative acceleration (grad) calculations via the sampling method are presented.
F. LeBlanc, G. Michaud, J. Richer
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Opacities and Atomic Diffusion
Galaxies, 2023 Opacity is a fundamental quantity for stellar modeling, and it plays an essential role throughout the life of stars. After gravity drives the collapse of interstellar matter into a protostar, the opacity determines how this matter is structured around ...
Georges Alecian, Morgan Deal
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Parallel Implementation of the PHOENIX Generalized Stellar Atmosphere Program [PDF]
, 1996 We describe the parallel implementation of our generalized stellar atmosphere and NLTE radiative transfer computer program PHOENIX. We discuss the parallel algorithms we have developed for radiative transfer, spectral line opacity, and NLTE opacity and ...
Baron E. +5 more
core +3 more sources
Photoejection from Various Systems and Radiative-Rate Coefficients
Atoms, 2022 Photoionization or photodetachment is an important process. It has applications in solar- and astrophysics. In addition to accurate wave function of the target, accurate continuum functions are required.
Anand K. Bhatia
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Quantum Molecular Dynamics calculations of radiative opacities [PDF]
Astronomy & Astrophysics, 2003 We show that Quantum Molecular Dynamics provides a powerful tool to extend and benchmark current opacities libraries into the complex regime of warm dense matter. In this regime, the medium can be constituted of electrons, protons, atoms and molecules, while plasma and many-body effects can not be treated as perturbations.
S. Mazevet +4 more
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International Astronomical Union Colloquium, 1993 AbstractA review is given of opacity calculations made during the past decade.
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