Fig. 7.
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EW diagram of Na I + Ca I versus CO for the FUor template and the observed candidates. The dashed line represents the empirical criterion defined by Connelley & Reipurth (2018) to separate FUor-type objects from other YSOs. Objects below the dashed line show enhanced CO absorption relative to Na I and Ca I and are therefore consistent with FUor-like near-infrared spectra.
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