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Alberto Noriega-Crespo (SIRTF Science Center - IPAC), A. Cotera, E. Young (Steward Observatory, U. Arizona)
New Hubble Space Telescope NICMOS images of the HH 7-11 outflow are presented. As expected from ground based images the outflow is strong and clearly detected in the H2 (1,0) S(1) 2.121\mum~emission, but surprisingly does not show P\alpha 1.87\mum~emission. In the near-IR H2 emission HH 7 is the most prominent feature, displaying a very complete arc-like structure, in contrast with other HH objects which have a more chaotic morphology at their leading working surfaces. At the position of the SVS 13 source, the continuum subtracted H2 image shows a clear indication of the jet with an extension of ~ 2\arcsec~following the the overall position angle of the outflow. Thus our observations strengthened the idea of SVS 13 as the driving source of the HH 7-11 outflow (Bachiller et al. 2000; astro-ph-0009439). A comparison with the 1998 archival WFPC2 images in H\alpha and [S~II] \lambda \lambda 6717/31 suggests that the Mach Disk plays a major role in the atomic/ionic emission.