Orion B (NGC 2024). II - Hat Creek synthesis observations of the molecular core in the J = 1 to 0 line of HCO(+)

view Abstract Citations (22) References (30) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Orion B (NGC 2024). II. Hat Creek Synthesis Observations of the Molecular Core in the J=10 Line of HCO + Barnes, Peter J. ; Crutcher, Richard M. Abstract Aperture synthesis maps of HCO(+) J = 1 to 0 emission at 89 GHz for the molecular cloud Orion B were obtained with the Hat Creek Array. The spatial resolution is 11 x 8 arcsec and the velocity resolution is 0.53 km/s. The maps show much fine structure in the dense molecular core, including a centrally located broad-line region with an elliptical velocity distribution and apparently centered on the FIR source FIR 6, a long-quiescent, NS-oriented ridge at a PA of -10 deg with a similar appearance to the cold dust emission, an EW ridge exactly abuts the ioniztaion front of the adjacent H II region, and a possible one-sided high-density outflow to the south with an region apparently not near any of the NIR sources but instead close to FIR 5. FIR 5 and 6 therefore seem to indicate two different centers of activity in the molecular core. Publication: The Astrophysical Journal Pub Date: March 1990 DOI: 10.1086/168454 Bibcode: 1990ApJ...351..176B Keywords: Molecular Clouds; Orion Nebula; Emission Spectra; Infrared Sources (Astronomy); Molecular Gases; Spatial Resolution; Velocity Distribution; Astrophysics; INTERFEROMETRY; INTERSTELLAR: MOLECULES; NEBULAE: INDIVIDUAL NGC NUMBER: NGC 2024; NEBULAE: INTERNAL MOTIONS full text sources ADS | data products SIMBAD (3) Related Materials (2) Part 1: 1989ApJ...342..883B Part 3: 1992ApJ...389..325B