Results 21 to 30 of about 35,447 (292)
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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International Astronomical Union Colloquium, 1993 AbstractA review is given of opacity calculations made during the past decade.
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On radiative opacities of dense plasmas
Physica B: Condensed Matter, 1996 Abstract Besides advanced atomic data, the strong coupling effects are the key-stones for true radiative opacities and for the proper description of energy transport in dense matter. These opacities, which are sensitive to the ‘windows’ in absorption spectra, are discussed briefly in terms of strongly coupled plasmas (SCP) dielectric functions.
Yu.K. Kurilenkov +4 more
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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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Radiative Transfer with Opacity Distribution Functions: Application to Narrowband Filters [PDF]
The Astrophysical Journal Supplement Series, 2021 Abstract Modeling of stellar radiative intensities in various spectral passbands plays an important role in stellar physics. At the same time, direct calculation of the high-resolution spectrum and then integration of it over the given spectral passband is computationally demanding due to the vast number of atomic and molecular lines ...
L. S. Anusha +5 more
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A numerical strategy for radiative transfer problems with higly oscillating opacities [PDF]
Applied Mathematics and Computation, 2013 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Julien Mathiaud, Francesco Salvarani
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A systematic study on 2p → 3d radiative opacity of lowly charged Cu plasmas
AIP Advances, 2021 The L-shell radiative opacity of lowly charged Cu plasmas is investigated using a detailed level accounting method. The transmission spectra are compared with a recent experiment at ∼16 eV and 0.005 g/cm3, and good agreement is observed. For a systematic
Wenhang Yu +6 more
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Helioseismic Tests of Radiative Opacities [PDF]
AIP Conference Proceedings, 2002 During the past fifteen years, thousands of solar acoustic oscillation modes have been measured to remarkable precision, in many cases to within 0.01%. These frequencies have been used to infer the interior structure of the sun and test the physical input to solar models. Here we summarize the procedures, input physics and assumptions for calculating a
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Improvements to Stellar Structure Models, Based on a Grid of 3D Convection Simulations. I. $T(\tau)$-Relations [PDF]
, 2014 Relations between temperature, T, and optical depth, tau, are often used for describing the photospheric transition from optically thick to optically thin in stellar structure models.
Asplund, Martin +4 more
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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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