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Fig. 3


Left: VVV CL027 field-star decontaminated CMD. The most probable cluster members and field stars are labelled with black and grey symbols, respectively. Numbers indicate the position for the spectroscopically observed stars. Main (1.0, 4.9, and 10.0 Myr, Lejeune & Schaerer 2001) and pre-main sequence (0.2, 0.7, and 1.0 Myr, Siess et al. 2000) isochrones are also shown in the diagram. Right, top: VVV CL027 field-decontaminated colour–colour diagram (CCD). We use the same symbols as in the CMD to show the most probable cluster members and field stars. The projected position following the Stead & Hoare (2009) extinction law of an O8 V (blue) and a K5 V (red) star are presented in the diagram. The thicker black segmented line shows the expected position for T Tauri stars along the extinction vector. Right, bottom: VVV CL027 P-DMF. The points show the central position in the mass ranges indicated above them, and the segmented red line corresponds to the best fit to the data.

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