Results 1 to 10 of about 197,703 (285)
Opacity Effects on Pulsations of Main-Sequence A-Type Stars
Atoms, 2018 Opacity enhancements for stellar interior conditions have been explored to explain observed pulsation frequencies and to extend the pulsation instability region for B-type main-sequence variable stars.
Joyce A. Guzik +2 more
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An Expanded Set of Los Alamos OPLIB Tables in MESA: Type-1 Rosseland-mean Opacities and Solar Models
The Astrophysical JournalWe present a set of 1194 Type-1 Rosseland-mean opacity tables for four different metallicity mixtures. These new Los Alamos OPLIB atomic radiative opacity tables are an order of magnitude larger in number than any previous opacity table release, and span
Ebraheem Farag +13 more
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Analytical expressions for radiative opacities of low Z plasmas
Journal of Physics: Conference Series, 2010 In this work we obtain analytical expressions for the radiative opacity of several low Z plasmas (He, Li, Be, and B) in a wide range of temperatures and densities. These formulas are obtained by fitting the proposed expression to mean opacities data calculated by using the code ABAKO/ RAPCAL. This code computes the radiative properties of plasmas, both
Garcia Rubiano, Jesus +6 more
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New single-valued-parameters radiative accelerations of Sc and Ni for modelling stellar interiors
Astronomy & AstrophysicsContext. The precise evaluation of the radiative accelerations of chemical elements in stars is critical since these accelerations are often the principal contributor to atomic diffusion. Atomic diffusion causes the migration of elements inside stars and
Alecian G., LeBlanc F., Hui-Bon-Hoa A.
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Irradiated Atmospheres. III. Radiative-convective-mixing Equilibrium for Nongray Picket-fence Model
The Astrophysical JournalThe nongray picket-fence model predicts more accurately the temperatures in low-density regions compared to semigray models. This study investigates how the vertical-mixing and convection fluxes modify the picket-fence model.
Wei Zhong +5 more
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AtomsAccurate determination of opacity is critical for understanding radiation transport in both astrophysical and laboratory plasmas. We employ atomic data from R-Matrix calculations to investigate radiative properties in high-energy-density (HED) plasma ...
Anil K. Pradhan, Sultana N. Nahar
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EPJ Web of Conferences, 2017 Atomic diffusion, including the effects of radiative accelerations on individual elements, leads to important variations of the chemical composition inside stars.
Deal M., Vauclair S., Richard O.
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Estimation of the radiation budget during MOSAiC based on ground-based and satellite remote sensing observations [PDF]
Atmospheric Chemistry and PhysicsAn accurate representation of the radiation budget is essential for investigating the impact of clouds on the climate system, especially in the Arctic, an environment highly sensitive to complex and rapid environmental changes.
C. Barrientos-Velasco +9 more
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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
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Physical Retrieval of Rain Rate from Ground-Based Microwave Radiometry
Remote Sensing, 2021 Because of its clear physical meaning, physical methods are more often used for space-borne microwave radiometers to retrieve the rain rate, but they are rarely used for ground-based microwave radiometers that are very sensitive to rainfall.
Wenyue Wang +2 more
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