Spatially resolved spectroscopy of Z Canis Majoris components

We present adaptive optics integral field spectrograph observations of the Z CMa binary in the 6203 Angstrom-6528 Angstrom band with a spectral resolu tion of 3200 and spatial resolution of 0.24 ", made with the OASIS instrume nt coupled to the PUE'O bonnette, Using the binary parameters derived from speckle interferometry, we are able to recover the spectrum of each compone nt, in spite of a spatial sampling (0.11 ") similar to the system separatio n (0.1 "). The component that dominates the optical continuum presents a sp ectrum similar to the one from the system in its pre-outburst phase. The ot her component (so-called ''IR companion") shows an emission line spectrum. Extended emission is detected in [OI]lambda 6300. This emission presents an unresolved peak plus an elongated structure, similar to that found in Clas sical T Tauri Stars' microjets. The low velocity component is unresolved an d slightly shifted from the stellar continuum location. The high velocity c omponent is extended but also contributes to the unresolved peak. This micr ojet is spatially associated with the infrared companion and with the syste m's powerful parsec-scale jet. The upper limit of the microjet width is 0.2 4 ", and its length is similar to 1 ". This size combined with the material velocity results in a dynamical time scale of similar to 10 yrs, compatibl e with its origin in the 1987 outburst.