Journal
ASTROPHYSICAL JOURNAL
Volume 546, Issue 2, Pages 1168-1170Publisher
UNIV CHICAGO PRESS
DOI: 10.1086/318311
Keywords
atomic processes; infrared : stars; line : profiles; radiation mechanisms : thermal; scattering; stars : atmospheres
Categories
Ask authors/readers for more resources
On the basis of recent state-of-the-art ab initio calculations of the interatomic potential and dipole surface of interacting helium (He) and hydrogen (H) atoms, we calculate the collision-induced absorption spectra in the infrared of the He-H pair, using a rigorous quantum mechanical formalism. Furthermore, we present a simple analytical model which is capable of reproducing these calculated spectra with precision, for frequencies from 50 to roughly 10,000 cm(-1) and temperatures from 1500 to 10,000 K. For a given temperature and frequency, the ratio of the absorption coefficient and the product of the H and He densities may be evaluated in seconds, even on small computers (e.g., PCs), provided this ratio exceeds a certain (very small) lower numerical limit.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available