Difference between curves of growth for even-odd and odd-even Fe I transitions

Details Difference between curves of growth for even-odd and odd-even Fe I transitions Difference between curves of growth for even-odd and odd-even Fe I transitions

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976azh....53..577k&link_type=abstract

Astronomicheskii Zhurnal, vol. 53, May-June 1976, p. 577-588. In Russian.

Astronomy and Astrophysics

Astronomy

Atomic Spectra, Electron Transitions, Photosphere, Solar Temperature, Spectrum Analysis, Ferric Ions, Iron, Line Spectra

Scientific paper

The excitation temperature of the solar photosphere is determined from lines of even-odd, odd-even, and both types of Fe I transitions for eight spectral regions in the wavelength range from 3000 to 9000 A. It is found that the excitation temperature computed from the lines of odd-even transitions is somewhat higher than that determined from the lines of even-odd transitions and that the difference increases markedly with photospheric depth. Using the appropriate excitation temperatures, independent curves of growth are derived from the lines considered in all eight spectral regions. The results show that the difference between the curves of growth becomes pronounced in a mildly sloping section and increases toward the damped section of the curves. It is suggested that the differences in both excitation temperatures and curves of growth are related to different effective formation depths for the lines of the two types of transitions, with the lines of odd-even transitions arising in deeper photospheric layers than those of the even-odd transitions.

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