Relationships between accretion luminosity and line luminosity for the several diagnostics as labelled in each panel. The Lupus YSOs are represented as black dots. The He i (λ5016 Å), He i (λ5876 Å), and He i (λ7065 Å) data available in literature for YSOs in Taurus (Herczeg & Hillenbrand 2008), the σ-Ori cluster (Rigliaco et al. 2012), and the Cha-II cloud (Biazzo et al. 2012) are overlaid as small open circles, star symbols, and as open circles, respectively.
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