NLTE analysis of the solar potassium abundance

H. W. Zhang, K. Butler, T. Gehren, J. R. Shi, G. Zhao
2006 Astronomy and Astrophysics  
Aims. We investigate the formation of neutral potassium lines in the solar photosphere based on extensive statistical equilibrium calculations to determine the solar potassium abundance. Methods. The computations are based on a 68-level potassium atomic model. Hydrogen collisions were supplied with an enhancement factor S H = 0.05 to the classical Drawin formula. Synthetic line profiles calculated from the level populations according to the NLTE departure coefficients were compared with the
more » ... mpared with the observed solar spectral atlas. Results. The solar potassium abundance based on theoretical model atmospheres is log ε (K) = 5.12 ± 0.03, which agrees with the meteoritic value of 5.09 ± 0.05 compiled by Lodders.
doi:10.1051/0004-6361:20065074 fatcat:jrvbc3cc3fbw3ia6usqp62m5ee