Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adil...lc...01c&link_type=abstract
NCSA Astronomy Digital Image Library
Astronomy and Astrophysics
Astronomy
Astronomical Interferometry, Astronomical Models, Bow Waves, Emission Spectra, Image Processing, Molecular Flow, Pre-Main Sequence Stars, Radio Jets (Astronomy), Red Shift, Shock Waves, Spatial Resolution, Star Formation, Stellar Mass Ejection
Scientific paper
In this letter, we present high spatial resolution (7") images, obtained with the BIMA interferometer, of the 47-66 km/s CO J=1-0 emission in the redshifted lobe of the NGC 2071 molecular outflow. The 47-66 km/s CO, hereafter referred to as the extremely high velocity (EHV) feature, has a mass of 0.01 solar masses, temperature of 50 K, density of 2 x 10^5 per cubic cm, and is spatially compact and spectrally distinct from the swept-up flow (3.5 solar masses). The EHV emission region consists of three main peaks which are individually unresolved by the interferometer beam. The EHV peaks resemble the ``hot spots'' found in the lobes of extragalactic radio sources. Since the EHV emission does not trace the outline of any of the known clumps in the outflow lobe, the EHV emission cannot be modeled as clumps being accelerated by a wind. Instead, we propose that the hot spots are caused by the (unseen) jet striking a known clump, and either the jet-bow shock fragments, or there are multiple bow shocks formed by a wandering jet.
Chernin Lawrence M.
Welch William J.
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