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Fig. 2


LX vs. LR diagram of the ONC, based on COUP X-ray data and radio observations reported by Zapata et al. (2004), detections are marked by “ × ”. The dotted line marked “GB93” marks the relation reported for WTTS (among other sources) by Güdel & Benz (1993), the filled dots mark all sources in Güdel & Benz (1993) that fall into the luminosity range considered here. The squares mark sources with LX/Lbol information, as explained in the upper left corner. Proplyds from Kastner et al. (2005) are marked by “°”. Some sources are marked with their GMR names (see text), and the only two (possibly) extragalactic sources from Getman et al. (2005b) are marked by “EG”.

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