Molecular line observations of the extremely high velocity molecular flow near HH 7-11

Abstract

view Abstract Citations (18) References (20) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Molecular Line Observations of the Extremely High Velocity Molecular Flow near HH 7--11 Koo, Bon-Chul Abstract The characteristics of CO J = 2-1 lines of extremely high velocity (EHV) molecular gas near HH 7-11 are described. The CO J = 2-1 to J = 1-0 line ratio in the EHV wing implies a large gas density of 1000 or 10,000/cu cm, depending on whether CO molecules are excited by collisions with H2 or H. While the results are not inconsistent with the EHV CO wing being the emission from CO molecules formed in the neutral stellar wind, the implied large gas density suggests that the wind is not homogeneous but rather blows in either lumps, filaments, or sheets. An upper limit of 0.01 is obtained for the abundance ratio SiO/CO in the EHV gas, which is consistent with a chemical model for neutral stellar winds. Publication: The Astrophysical Journal Pub Date: September 1990 DOI: 10.1086/169176 Bibcode: 1990ApJ...361..145K Keywords: Herbig-Haro Objects; Line Spectra; Molecular Spectra; Stellar Winds; Carbon Compounds; Flow Velocity; Infrared Sources (Astronomy); Interstellar Gas; Magnetohydrodynamic Flow; Oxygen Compounds; Astrophysics; INTERSTELLAR: MOLECULES; LINE PROFILES; STARS: PRE--MAIN-SEQUENCE; STARS: WINDS full text sources ADS | data products SIMBAD (2)