File:KPNO-Tau-4 graph.gif

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V-band excesses as a function of spectral type. Filled circles denote Taurus members, open circles denote Upper Sco members, and large symbols denote confirmed or probable accretors. The solid line shows the mean value for all nonaccretors in our sample, and the dashed line shows the corresponding 2 σ limit for the existence of significant optical excesses. The four objects with significant excesses are labeled. From: https://iopscience.iop.org/article/10.1086/503665/fulltext/

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