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Fig. 3


Summary of observed 10 GHz radio fluxes. We show the characteristic [3.6]–[4.5] color ranges of the Class III, II, and 0/I YSOs as blue, yellow, and red filled regions which are bound in horizontal axis by [−0.4, 0.4], [0.0, 0.8], and [0.8, 4.0], respectively (overlapped area for Class III and II objects appears in green; see Allen et al. 2004). Our 10 GHz detections are presented as black circles. For sources we detected at 10 GHz, we also presented the fluxes measured at 7.5 GHz (red symbols) by Dzib et al. (2013). For the purposes of presentation, we offset the [3.6]–[4.5] values of the red symbols by −0.04. The observations towards the same target sources are linked by green lines. Gray and red downward triangles are the 3σ upper limits from these observations. Dashed lines show the expected radio fluxes from EUV photoevaporation winds from protoplanetary disks, assuming the EUV flux ΦEUV =1041 (bottom) and 1042 photons s−1 (top).

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