Results 31 to 40 of about 35,353 (312)
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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The Inhomogeneity Effect. I. Inhomogeneous Surface and Atmosphere Accelerate Planetary Cooling
The Astrophysical Journal, 2023 We propose a general principle that under radiative-convective equilibrium, the spatial and temporal variations in a planet’s surface and atmosphere tend to increase its cooling.
Xi Zhang
doaj +1 more source
Asteroseismology of Massive Stars : Some Words of Caution [PDF]
, 2014 Although playing a key role in the understanding of the supernova phenomenon, the evolution of massive stars still suffers from uncertainties in their structure, even during their "quiet" main sequence phase and later on during their subgiant and helium ...
Gabriel, M. +5 more
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Generation of a sharp density increase in radiation transport between high-Z and low-Z plasmas
Matter and Radiation at Extremes, 2016 A sharp density increase (referred to as density incrustation) of the Au plasmas in the radiative cooling process of high-Z Au plasmas confined by low-Z CH plasmas is found through the radiative hydrodynamic simulations.
Guangwei Meng +4 more
doaj +1 more source
Observational properties of peculiar core-collapse super-novae producing r-process elements [PDF]
EPJ Web of Conferences, 2022 We investigate the effects of r-process elements on the electromagnetic wave emission from peculiar core-collapse supernovae. We perform a series of radiative transfer simulations based on one-dimensional hydrodynamical explosion models. Varying the mass
Hasegawa Tatsuki +5 more
doaj +1 more source
Radiative atomic Rosseland mean opacity tables
The Astrophysical Journal Supplement Series, 1992 For more than two decades the astrophysics community has depended on opacity tables produced at Los Alamos. In the present work we offer new radiative Rosseland mean opacity tables calculated with the OPAL code developed independently at LLNL. We give extensive results for the recent Anders-Grevesse mixture which allow accurate interpolation in ...
Forrest J. Rogers, Carlos A. Iglesias
openaire +1 more source
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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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
doaj +1 more source
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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Instabilities in the Envelopes and Winds of Very Massive Stars
, 2014 The high luminosity of Very Massive Stars (VMS) means that radiative forces play an important, dynamical role both in the structure and stability of their stellar envelope, and in driving strong stellar-wind mass loss.
A. A. Belyanin +53 more
core +1 more source