Blue-to-red peak intensity ratio as a function of FWQM for Hα (upper) and Hβ (bottom). The correlation coefficients are r = −0.55 (P0 = 0.2E-03) and r = −0.14 (P0 = 0.4) for Hα and Hβ respectively. The best fit parameters are given on the plots. The measurements for the Hα of Gezari et al. (2007) are given on upper plot (open triangles).
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