Paper:	The solar CA II lines
Volume:	9, Cool Stars, Stellar Systems, and the Sun: Sixth Cambridge Workshop
Page:	103
Authors:	Uitenbroek, Han
Abstract:	The formation of the 854.2 nm IR line and the K line are calculated by using the VAL3C model to manage multilevel non-LTE line transfer with partial frequency redistribution. A partial redistribution (PR) transfer equation and transfer operator are used to correct the population numbers, and an extra error term drives the redistribution of frequency over the emission-line profile. The scattering integral introduces nonlinearities in the line formation, but PR effects of many lines can be handled without significant increases in computer time and memory. Calculations made using the plane parallel model show that cross redistribution between the K line and the 854.2 nm IR line is not significant. Ca II K(2V) bright points are also examined, and the asymmetric profiles of the bright points suggest that their formation involves a distinct mechanism from that of Ca II network enhancements.

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