Results 21 to 30 of about 34,429 (304)
A Table of the Radiative Opacities of a Number of Gas Mixtures.
The Astrophysical Journal, 1955 Geoffrey Keller, R. E. Meyerott
openalex +4 more sources
Radiative and Conductive Opacities for Eleven Astrophysical Mixtures.
The Astrophysical Journal Supplement Series, 1965 A. N. Cox, John N. Stewart
openalex +3 more sources
Radiative opacity tables for 40 stellar mixtures
The Astrophysical Journal Supplement Series, 1976 Using improved methods, radiative opacities for 40 mixtures of elements are given for use in calculations of stellar structure, stellar evolution, and stellar pulsation. The major improvements over previous Los Alamos data are increased iron abundance in the composition, better allowance for the continuum depression for bound electrons, and corrections
A. N. Cox, J. E. Tabor
openalex +3 more sources
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
doaj +1 more source
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
doaj +1 more source
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
openalex +2 more sources
Opacity Studies of Silicon in Radiatively Heated Plasma [PDF]
The Astrophysical Journal, 2008 Measurements of the opacity of silicon at high temperature and high density are reported. A silicon dioxide foam was heated by eight nanosecond laser beams while a backlighter X-ray source was produced with a picosecond laser. Absorptions of the 1-2 transitions of Si XII through Si VI were observed in the wavelength range from 6.6 to 7.1 A.
Hui Wei +22 more
openalex +3 more sources
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source