The Location of Extremely High Velocity HCO + in the HH 7-11 Outflow

Abstract

view Abstract Citations (8) References (15) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Location of Extremely High Velocity HCO + in the HH 7-11 Outflow Mehringer, David M. Abstract In order to determine the location of extremely high velocity (EHV) HCO+ emission in the HH 7-11 outflow, BIMA observations of the j = 1 → 0 transition with 11" x 8."9 angular resolution were carried out. Two spatially unresolved clumps with average velocities 40 km s-1 blueward of the ambient material are detected. The two clumps are projected less than 4" (1400 AU) and 25" (8800 AU) from SVS 13, the IR source which drives the outflow. EHV redshifted material is also observed, although it is not as easily separated from lower velocity material. No high-velocity HCO+ emission is observed toward the HH objects. The position of high-velocity HCO+ emission relative to the exciting source in this region is similar to that observed in the L1551 IRS 5 outflow by Rudolph. This similarity suggests that, as in the case of L1551 IRS 5, the high-velocity molecular material in the HH 7-11 outflow may have been entrained in the neutral atomic wind of SVS 13 as it passed through the surrounding cloud. In addition, lower velocity HCO+ J = 1 → 0 emission traces a curved structure near HH 7, the most distant HH object from SVS 13. The symmetry axis of the curved structure is nearly coincident with the HH object outflow/jet axis, suggesting that the SVS 13 wind/jet is responsible for sweeping up molecular material that forms the curved structure. Publication: The Astrophysical Journal Pub Date: May 1996 DOI: 10.1086/177157 Bibcode: 1996ApJ...462..355M Keywords: ISM: CLOUDS; ISM: INDIVIDUAL ALPHANUMERIC: HH 7-11; ISM: JETS AND OUTFLOWS; ISM: MOLECULES; RADIO LINES: ISM full text sources ADS | data products SIMBAD (16)