11: Curve of Growth
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It will be part of the aim of this chapter to predict the curve of growth for gaussian and lorentzian profiles, and also for Voigt profile for different Gauss/Lorentz ratios. The curve of growth (die Wachstumskurve) is a graph showing how the equivalent width of an absorption line, or the radiance of an emission line, increases with the number of atoms producing the line.
- 11.1: Introduction to Curve of Growth
- The curve of growth (die Wachstumskurve) is a graph showing how the equivalent width of an absorption line, or the radiance of an emission line, increases with the number of atoms producing the line.
- 11.4: Curve of Growth for Gaussian Profiles
- By “gaussian profile” in the title of this section, I mean profiles that are gaussian in the optically-thin case; as soon as there are departures from optical thinness, there are also departures from the gaussian profile. Alternatively, the absorption coefficient and the optical depth are gaussian; the absorptance is not.
- 11.6: Curve of Growth for Voigt Profiles
- Our next task is to construct curves of growth for Voigt profiles for different values of the ratio of the Lorentzian and Gaussians.