HR diagram of objects classified by their SINFONI spectra. Top: the extinction corrected M_K vs. log(T) HR diagram. The K-band magnitude has been corrected for a distance of 830  ±  50 pc. Over plotted with a dashed line is the ZAMS isochrone from Blum et al. (2000) and the dotted lines represent the isochrones from Da Rio et al. (2009) between 1 and 10 Myr calculated from the Siess et al. (2000) evolutionary models. The bottom panel shows the same diagram with overplotted the pre-main-sequence evolutionary tracks for 3, 2.5, 2, 1.5 and 1 M_⊙ stars from Da Rio et al. (2009).