Observations of Molecular Clouds in the HH 1-2 Region

Details Observations of Molecular Clouds in the HH 1-2 Region Observations of Molecular Clouds in the HH 1-2 Region

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...477..754c&link_type=abstract

Astrophysical Journal v.477, p.754

Astronomy and Astrophysics

Astronomy

16

Ism: Individual Alphanumeric: Hh 1-2, Ism: Jets And Outflows, Ism: Molecules, Ism: Structure, Stars: Formation

Scientific paper

We observed the region of Herbig-Haro object HH 1-2 with several molecular lines. The emission is dominated by two large-scale (~150") elongations roughly parallel to each other in the HCO+ J = 3 --> 2 line map. We discuss our results testing the two possibilities suggested in the literature: a molecular toroid around VLA 1, as suggested by Torrelles et al. (1994), and two physically disconnected elongations, as suggested by Cernicharo (1991). Around the central source, VLA 1, our HCO+ J = 4 --> 3 and H2CO J_{K_{-1}K_{+1}}=303-->202 maps all show a ~40" scale elongation nearly perpendicular to the HH 1-2 axis. We suggest that this molecular core is a disk/toroid-like structure. Our CO J = 3 --> 2 data reveal the existence of a molecular outflow around VLA 1. We also observed an HCO+ clump downwind of HH 2, where the HCO+ abundance is possibly enhanced by the shock. We also discuss the star formation activities around VLA 3.

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