Singular vectors in wavelength for three cases. Black: i = 90° with 4 km s−1 equatorial rotation rate. Red: All inclinations (i = 0°, 10°, … , 90°) combined with 4 km s−1 equatorial rotation rate. Green: All inclinations combined with all equatorial rotation rates (0 km s−1, 1 km s−1, … , 6 km s−1). Solid, dotted, and dashed lines indicate the first, second, and third vectors, respectively. The signs of some of the vectors were inverted; they are arbitrary in an SVD. All cases are for the 6173 Å line at 0 G.
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