Fig. 11
Detection limits in apparent Hα line flux at 5σ confidence levels. The colored shaded regions around each curve represent the standard deviation of the contrasts obtained at eight PAs. PDS 70 b and c from Haffert et al. (2019) are shown as red stars. The three horizontal lines show predicted Hα emission estimated from Gullbring et al. (1998) and Rigliaco et al. (2012). The detailed estimation can be found in Sect. 6.2
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