Fig. 1
Spatial distribution of our ONC targets (filled stars) and the sample of D’Orazi et al. (2009) re-analyzed in this work (empty stars). Dots represent the Hillenbrand (1997) sample with membership probability higher than 90%. The field is centered on the Trapezium cluster and covers an area of about 0.5° × 0.5°. The position of the star at the edge of the main cluster (P1455) is given.
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