CH and CH⁺ lines in facula models

Abstract

Equivalent width calculations for CH and CH⁺ are carried out in three facula models. For CH, the λ4313.662 A line of the (0-0) and of the transition ²∆ - ²II of the Q₁c branch, and for CH⁺ , the λ 4288.047 A line of the (0-0) band of the transition A ¹II- X¹ ∑⁺ of the Q branch are selected. For CH the KF and LF facula models seem to behave similarly, whereas the 7B2J model behaves differently, and gives higher equivalent width at the center of the disc.