src.Atomic.Opacity.xclte

src.Atomic.Opacity.xclte(T, n_H, n_e, wl)[source]

LTE continuum opacity in cm-1, incruding HI, H-, H2, rayleigh scat.

Parameters

  • T (Temperature, [\(K\)]) –

  • n_H (H atom number density, [\(cm^{-3}\)]) –

  • n_e (electron number density, [\(cm^{-3}\)]) –

  • wl (wavelength, [\(\AA\)]) –

Notes

HI Rayleigh opacity in LTE is 1.

khray = n_HI * HIRayleigh_CrossSection(wl) * 1.e-26 (/cm)

  • n_HI: hydrogen number density in cm^(-3)

  • stimulated emission is corrected

  • partition function of HI is assumed to be 2.0, which is valid for T < 2.e4 K

Modification history:

  • k.ichimoto 18 jun. 1987, 6 Jan. 1992

  • k.ichimoto 19 Feb.1994

  • 2019.9.15 K.Ichimoto from IDL avray.pro

References

1

Gingerich SAO special report 167,21,1964. porinomial fitting for f-f gaunt factor is taken from Carbon & Gingerich (1969) “theory and observation of normal stellar atmosphere” MIT press