High Resolution Spectroscopy of Shocked H2 from Stellar Outflows

Details High Resolution Spectroscopy of Shocked H2 from Stellar Outflows High Resolution Spectroscopy of Shocked H2 from Stellar Outflows

May 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...19513505y&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #135.05; Bulletin of the American Astronomical Society, Vol. 32, p.883

Biology

Scientific paper

We present new high resolution spectroscopy of nine separate H2 emission knots from outflows in OMC-2/3. The long-slit spectra, taken with the Phoenix spectrograph mounted at the KPNO Mayall 4 m, show 2.12 μ m v=1--0 S(1) emission with FWHMs of 15--35 km s-1. The majority of the spectral line profiles show a single peak, corresponding to the main bow shock, with the peak velocities clustered near the v LSR of the cloud at 13--14 km s-1. Four knots in addition show the jet (or Mach disk) shocks, blue-shifted from the ambient cloud v LSR by -75 km s-1 to -20 km s-1. Comparisons to parabolic bow-shock models allow us to roughly determine the flow orientation with respect to the line-of-sight, and ascertain that the emission is likely to be due to C-shocks. This research was partially funded by the NASA Astrobiology program.

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