A 2000 kilometer per second "pristine" post-asymptotic giant branch wind in the proto-planetary nebula He 3-1475

We analyze (archival) Space Telescope Imaging Spectrograph long-slit H alph a spectra of the proto-planetary nebula He 3-1475. We find two remarkable b lueshifted absorption features arising from the inner cm similar to5 x 10(1 6) cm of the nebula, revealing the presence of two different winds outflowi ng at high velocity from the central star. The kinematic age of these winds is only tens of years. We find that the fast wind is flowing with velociti es in the range similar to 150-1200 km s(-) whereas the ultrafast wind is m oving much faster (up to 2300 km s(-1)). The latter is highly collimated (l ength/width greater than or similar to7) close to the central star (similar to 10(16) cm) along a direction different from previous mass ejection axes and shows a radially increasing velocity. We identify the ultrafast wind w ith a "pristine" post-asymptotic giant branch (post-AGB) outflow that has n ot been (strongly) altered by its interaction with the AGB envelope. We dis cuss the implications of the spatiokinematic structure of this wind for cur rent theories of the formation and shaping of planetary nebulae.