Perturbations (black) for the 6173 Å line for the G2 star with 0 G, i = 0° and no rotation. The values of (l, m) are (0, 0) (solid), (1, 0) (dotted), (2, 0) (dashed), and (3, 0) (dash-dotted). Also shown (in red) is the derivative scaled to best fit each perturbation. The shape (but not magnitude) of the perturbations do not depend on i and m in the absence of rotation.
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