Results 31 to 40 of about 35,447 (292)

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, Jianguo Wang, Xuerong Wang, Jinghong Li, Weiyan Zhang   +4 more
doaj   +1 more source

The Stagger-grid: A Grid of 3D Stellar Atmosphere Models - I. Methods and General Properties [PDF]

, 2013
We present the Stagger-grid, a comprehensive grid of time-dependent, 3D hydrodynamic model atmospheres for late-type stars with realistic treatment of radiative transfer, covering a wide range in stellar parameters. This grid of 3D models is intended for
Asplund, M., Chiavassa, A., Collet, R., Hayek, W., Magic, Z., Nordlund, Å., Stein, R. F., Trampedach, R.   +7 more
core   +1 more source

Opacities for the solar radiative interior

The Astrophysical Journal, 1991
Opacities for the solar radiative interior are computed and compared to previous calculations. A significant enhancement of the Rosseland mean opacity near the bottom of the convection zone is reported when compared to the Los Alamos Astrophysical Opacity Library. The discrepancy is attributed mainly to the equation of state.
C. A. Iglesias, F. J. Rogers
openaire   +1 more source

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

Radiative transfer and the energy equation in SPH simulations of star formation [PDF]

, 2007
We introduce and test a new and highly efficient method for treating the thermal and radiative effects influencing the energy equation in SPH simulations of star formation.
A. P. Whitworth, Alexander, Attwood, Bate, Bate, Bell, Black, Boley, Bonnell, Boss, Boss, Boss, D. Stamatellos, Gingold, Goodwin, Goodwin, Hubber, Hubeny, Iglesias, Kitsionas, Klein, Larson, Larson, Larson, Low, Lucy, Masunaga, Masunaga, Masunaga, Mayer, Monaghan, Monaghan, Oxley, Preibisch, S. Goodwin, Spiegel, Stamatellos, Stamatellos, T. Bisbas, Truelove, Viau, Whitehouse, Whitehouse, Whitehouse, Whitworth, Whitworth   +45 more
core   +3 more sources

Radiative accelerations of nickel from new monochromatic opacities

Astronomy & Astrophysics
Context. Radiative accelerations express the transfer of momentum from the radiation field to the various chemical species of the stellar medium. They are evaluated from the monochromatic cross-sections of each element given the local thermodynamical ...
Hui-Bon-Hoa A., Pain J.-C.
doaj   +1 more source

The opacity of grains in protoplanetary atmospheres

, 2007
We have computed the size distribution of silicate grains in the outer radiative region of the envelope of a protoplanet evolving according to the scenario of Pollack et al. (1996).
Chokshi, Clayton, Dorschner, Fuchs, Haisch, Hubickyj, Kasten, Khare, Kovetz, M. Podolak, N. Movshovitz, Podolak, Podolak, Pollack, Saumon, van de Hulst, Weaver, Weidenschilling, Wetherill   +18 more
core   +1 more source

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, Christopher J. Fontes, Chris Fryer   +2 more
doaj   +1 more source

3D LTE spectral line formation with scattering in red giant stars [PDF]

, 2011
We investigate the effects of coherent isotropic continuum scattering on the formation of spectral lines in local thermodynamic equilibrium (LTE) using 3D hydrodynamical and 1D hydrostatic model atmospheres of red giant stars.
Allen de Prieto, Anstee, Asplund, Asplund, Asplund, Asplund, Asplund, Asplund, Asplund, Auer, Auer, Barklem, Barklem, Barklem, Barklem, Barklem, Barklem, Barklem, Beers, Behara, Bihain, Caffau, Cayrel, Cayrel, Collet, Collet, Dravins, Dravins, Eidelsberg, Feautrier, González Hernández, Hayek, Huang, Hui, Kiselman, Lai, Ludwig, M. Asplund, Marquette, Nordlund, Nordlund, Olson, Pereira, Pereira, R. Collet, Ruscic, Sauval, Sbordone, Skartlien, Spite, Steffen, Stein, Trujillo Bueno, Uitenbroek, Urdahl, W. Hayek, Å. Nordlund   +56 more
core   +2 more sources

OP data on CD for mean opacities and radiative accelerations

, 2004
All monochromatic opacity data from the Opacity Project (OP), together with all codes required for the calculation of mean opacities and radiative accelerations for any required chemical mixture, temperature and mass-density, are being put on a 700 Mb CD
Seaton, M. J.
core   +1 more source