Dark and bright sides of the Broad Line Region clouds as seen in the FeII emission of SDSS RM 102

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Fig. 4.

Contour plots denoting the ratios observed in the source RM 102 for different values of metallicity and microturbulence. The black, red, and blue contours denote R_UV−opt, R_UV, and R_opt, respectively. An orange dot in each plot marks the position of the best χ² for each bin of metallicity.

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