The Balmer Lines in Early Type Stars |
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agreement approximation of detailed assume Astrophysical Journal asymptotic Avrett Balmer lines behavior bound-bound transitions bound-free bound-free transitions broadening theories calculations Chapter collision cross sections collision rates collisional comparison computations consider cross-section define density departure coefficients departures from LTE detailed balancing discussed Doppler Doppler profile early type stars effective temperature electron equivalent widths estimate ESW theory Figure frequency Furthermore Griem theory Hẞ Hy profiles hydrogen line hydrogen line blanketed indicated integral equation iteration Kalkofen line profiles line source function line transfer problems log g luminosity matrix metal line blanketing Mihalas Modified Bethe monochromatic nm nm observations obtained opacity optical depth perturbers photoelectric photospheric plotted procedure quasi-static radiation field regions Saraph significantly Sirius and Vega solution solved spectral Stark broadening statistical equilibrium stellar atmospheres stimulated emissions Strom surface gravities Teff temperature correction temperature structure two-level atom uncertainties widths of Hy Δλ