Powerful jets and weak outflows: HH 1-2 and HH 34

Details Powerful jets and weak outflows: HH 1-2 and HH 34 Powerful jets and weak outflows: HH 1-2 and HH 34

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...443..181c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 443, no. 1, p. 181-186

Astronomy and Astrophysics

Astrophysics

40

Herbig-Haro Objects, Interstellar Matter, Jet Flow, Mapping, Molecular Clouds, Red Shift, Pre-Main Sequence Stars, Star Formation, Stellar Winds, Very Large Array (Vla), Water Masers

Scientific paper

We have mapped the molecular outflows in the regions surrounding the Herbig-Haro (HH) 1-2 and HH 34 jets. The molecular outflows associated with the jets are predominantly redshifted, as expected for outflows that originate near the front surfaces of clouds. The HH 1-2 region contains a 0.3 solar masses outflow originating near the very large array (VLA) continuum and H2O maser source 1.3 min to the northwest of the driving source of the HH 1-2 optical flow. We can put a rough upper limit of 0.03 solar masses on the amount of molecular outflow associated with the HH 1-2 jet. The HH 34 molecular outflow is well aligned with the jet axis but amounts only to a mass of 0.003 solar masses, making it one of the weakest outflows measured. Since these outflows are so weak, we estimate that the jets must have deposited more than two orders of magnitude more momentum in the intercloud medium (ICM) than the ambient cloud. This suggests that shocks generated by the jet may exist far outside the cloud boundaries, and have a significant effect on the ICM.

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