CDROM/APJ/V382/P636 Rosseland Mean Free-Free Gaunt Factor (Itoh+ 1991) ================================================================================ The Rosseland Mean Free-Free Gaunt Factor of the Dense High-Temperature Stellar Plasma Naoki Itoh, Fumiyoshi Kuwashima, Koki Ichihashi, and Haruhiko Mutoh <1991, ApJ, 382, 636> =1991ApJ...382..636I ================================================================================ Abstract: The Rosseland mean free-free Gaunt factor of the dense high-temperature stellar plasma is calculated, based on both the accurate relativistic cross section and Sommerfeld's exact nonrelativistic cross section. A wide range of electron degeneracy is accurately taken into account. Comparison of the resulting free-free opacity with the electron conduction opacity is made. Keywords: atomic processes - dense matter - opacities - plasmas File Summary: -------------------------------------------------------------------------------- File Name Lrecl Records Explanations -------------------------------------------------------------------------------- table1.dat 139 50 Results of Calculations of <> -------------------------------------------------------------------------------- Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 F4.1 --- Eta Value of the degeneracy parameter, eta 5 1X --- --- Blank 6- 7 A2 --- Elem *Element for Gaunt factor calculation 8-18 D11.3 --- G-4.0 []? Gaunt factor, log Gamma^2 = -4.0D+00 19-29 D11.3 --- G-3.5 []? Gaunt factor, log Gamma^2 = -3.5D+00 30-40 D11.3 --- G-3.0 []? Gaunt factor, log Gamma^2 = -3.0D+00 41-51 D11.3 --- G-2.5 []? Gaunt factor, log Gamma^2 = -2.5D+00 52-62 D11.3 --- G-2.0 []? Gaunt factor, log Gamma^2 = -2.0D+00 63-73 D11.3 --- G-1.5 []? Gaunt factor, log Gamma^2 = -1.5D+00 74-84 D11.3 --- G-1.0 []? Gaunt factor, log Gamma^2 = -1.0D+00 85-95 D11.3 --- G-0.5 []? Gaunt factor, log Gamma^2 = -5.0D-01 96-106 D11.3 --- G+0.0 []? Gaunt factor, log Gamma^2 = 0.0D+00 107-117 D11.3 --- G+0.5 []? Gaunt factor, log Gamma^2 = 5.0D-01 118-128 D11.3 --- G+1.0 []? Gaunt factor, log Gamma^2 = 1.0D+00 129-139 D11.3 --- G+2.0 []? Gaunt factor, log Gamma^2 = 2.0D+00 -------------------------------------------------------------------------------- Notes for file: table1.dat -------------------------------------------------------------------------------- Elem: The Rosseland mean inverse Gaunt factor was calcluated for the following: H - relativistic hydrogen He - relativistic helium C - relativistic carbon O - relativistic oxygen G - exact nonrelativistic inverse Gaunt factor -------------------------------------------------------------------------------- ================================================================================ (End) Lee E. Brotzman [ADS] 27-Aug-97