Minho Choi and Shudong Zhou 1997 ApJ 477 754 doi:10.1086/303730
Minho Choi1 and Shudong Zhou1
Show affiliationsWe 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 JK−1K+ 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.
ISM: individual (HH 1-2); ISM: jets and outflows; ISM: molecules; ISM: structure; stars: formation
Issue 2 (1997 March 10)
Received 1996 May 29, accepted for publication 1996 September 16
Minho Choi and Shudong Zhou 1997 ApJ 477 754
Sungho Lee et al. 2008 ApJ 674 247
Minho Choi and Ya-Wen Tang 2006 ApJ 648 504
Geumsook Park and Minho Choi 2007 ApJ 664 L99
Minho Choi and Ken'ichi Tatematsu 2004 ApJ 600 L55
Chunhua Qi et al 2004 ApJ 616 L11
Neal J. Evans II et al. 2005 ApJ 626 919
Minho Choi et al. 2000 ApJ 538 738
Minho Choi 2005 ApJ 630 976
Miju Kang et al. 2008 ApJ 683 267