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There is cumulative evidence showing that, for the most massive galaxies, thefraction of disk-like objects compared to those with spheroidal propertiesincreases with redshift. However, this evolution is thus far based on thesurface brightness study of these objects. To explore the consistency of thisscenario, it is necessary to measure the dynamical status of these galaxies.With this aim we have obtained seeing-limited near-infrared integral fieldspectra in the H-band for 10 massive galaxies (M_{stellar} >10^{11} h_{70}^-2M_{Sun}) at z~1.4 with SINFONI at the VLT. Our sample is selected by theirstellar mass and EW[OII] > 15 \AA, to secure their kinematic measurements, butwithout accounting for any morphological or flux criteria a priori. Throughthis 3D kinematic spectroscopy analysis we find that half (i.e. 50+/-7%) of ourgalaxies are compatible with being rotationally supported disks, in agreementwith previous morphological expectations. This is a factor of approximately twohigher than what is observed in the present Universe for objects of the samestellar mass. Strikingly, the majority of our sample of massive galaxies showextended and fairly high rotational velocity maps, implying that massivegalaxies acquire rapidly rotational support and hence gravitationalequilibrium. Our sample also show evidence for ongoing interactions andmergers. Summarizing, massive galaxies at high-z show a significant diversityand must have continued evolution beyond the fading of stellar populations, tobecome their present day counterparts.

SINFONI/VLT 3D spectroscopy of massive galaxies: Evidence of rotational support at z~1.4