HST NICMOS Images of the HH 7-11 Outflow

Details HST NICMOS Images of the HH 7-11 Outflow HST NICMOS Images of the HH 7-11 Outflow

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.1008n&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #10.08; Bulletin of the American Astronomical Society, Vol. 32, p.1413

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Scientific paper

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) 2.121μ m emission, but surprisingly does not show Pα 1.87μ m 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 Hα and [S II] λ λ 6717/31 suggests that the Mach Disk plays a major role in the atomic/ionic emission.

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