The parity effect of spectral terms of NI I on a curve of growth

Astronomy and Astrophysics – Astronomy

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Atomic Excitations, Line Spectra, Nickel, Photosphere, Solar Spectra, Curves, Eddington Approximation, Solar Temperature, Sun, Temperature Effects, Transition Probabilities

Scientific paper

The excitation temperature of the solar photosphere is determined from the lines of the even-odd and odd-even transitions of Ni I. Mean values of excitation temperature thus determined are 4850 K for even-odd and 5600 K for odd-even transitions, while the mean value determined from lines of both transitions is 5100 K. A curve of growth is constructed for the solar disk from 229 Ni I lines in the Milne-Eddington approximation from even-odd, odd-even, and both transitions.

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