منابع مشابه
Low Temperature Opacities
Previous computations of low temperature Rosseland and Planck mean opacities from Alexander & Ferguson (1994b) are updated and expanded. The new computations include a more complete equation of state with more grain species and updated optical constants. Grains are now explicitly included in thermal equilibrium in the equation of state calculation, which allows for a much wider range of grain c...
متن کاملEvolution and chemical yields of AGB stars: effects of low-temperature opacities
The studies focused on the Thermally-Pulsing Asymptotic Giant Branch phase experienced by lowand intermediate-mass stars are extremely important in many astrophysical contexts. In particular, a detailed computation of their chemical yields is essential for several issues, ranging from the chemical evolution of galaxies, to the mechanisms behind the formation of globular clusters. Among all the ...
متن کاملLow temperature Rosseland opacities with varied abundances of carbon and nitrogen
Context. The radiative energy transport can under certain assumptions be treated in the diffusion approximation. If so, the Rosseland mean opacity coefficient characterises the interaction between radiation and matter. The opacity data are usually available in pretabulated form, and in the generation of the data one assumes a distinct heavy element mixture which is usually a scaled solar one. I...
متن کاملSupernova Neutrino Opacities
In a supernova (SN) core during infall and after collapse, neutrinos are trapped by their interactions with nucleons. For the axial-vector current interactions it is not enough to include static particle-particle correlations. Even the single-nucleon spin autocorrelation reduces the scattering cross section dramatically. Therefore, the dynamical structure of the spin-density structure function ...
متن کاملMolecular opacities for exoplanets.
Spectroscopic observations of exoplanets are now possible by transit methods and direct emission. Spectroscopic requirements for exoplanets are reviewed based on existing measurements and model predictions for hot Jupiters and super-Earths. Molecular opacities needed to simulate astronomical observations can be obtained from laboratory measurements, ab initio calculations or a combination of th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1994
ISSN: 0252-9211
DOI: 10.1017/s0252921100026713