Free–free absorption coefficients and Gaunt factors for dense hydrogen-like stellar plasma

Abstract

In this work, we present a study dedicated to determination of the inverse bremsstrahlung absorption coefficients and the corresponding Gaunt factor of dense hydrogen-like stellaratmosphere plasmas where electron density and temperature change in a wide range. A method suitable for this wide range is suggested and applied to the inner layers of the solar atmosphere, as well as the plasmas of partially ionized layers of some other stellar atmospheres (for example, some DA and DB white dwarfs) where the electron densities vary from 10 14 cm −3 to 10 20 cm −3 and temperatures from 6000 K to 300 000 K in the wavelength region of 10 nm ≤ λ ≤ 3000 nm. The results of the calculations are illustrated by the corresponding figures and tables.

The development of simplified approach in describing of the ionic field to emitter interaction in stellar and laboratory plasmas

“…The usage of Cut-off Coulomb model potential was applied in the fully quantum mechanical solution for determining the optical properties of dense hydrogen plasma. Up until now the results were presented and used for instance see Dimitrijević et al (2018); Srećković et al (2018); Mihajlov et al (2015Mihajlov et al ( , 2011; Ignjatović et al (2017); Ignjatović et al (2009). Both Coulomb as well as cut-off Coulomb potential is presented in Eq.…”