Observations of SiO toward OMC-1 - a new outflow source 1. 5 arcmin south of Orion-KL

Journal Article · Sun Mar 01 04:00:00 EST 1987 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/184849· OSTI ID:6166974

Ziurys, L M; Friberg, P

Observations of the J = 2-1 transition of thermal SiO have been carried out toward OMC-1. Approximately 1.5 arcmin south of the KL nebula and IRc2, a new moderately strong source of SiO emission with T(a)-asterisk of about 1 K has been detected. The emission appears to be confined to a region 30 arcsec or less in size and shows evidence of high-velocity wings extending + or - 12-15 km/s from line center, which may indicate the presence of an embedded star in its early stages. The SiO J - 2-1 line was sought at other positions in OMC-1 but was not detected except at (3N, 1E), where a weak narrow line was observed. Derived column densities and abundances at the 1.5-arcmin S, (3N, 1E), and KL positions suggest that SiO formation is favored in regions where outflows and high temperatures are present. 26 references.

• Research Organization: Five College Radio Astronomy Observatory, Amherst, MA
• OSTI ID: 6166974
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 314; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMISTRY
COSMIC GASES
COSMIC RADIO SOURCES
COSMOCHEMISTRY
FLUIDS
GASES
INTERSTELLAR SPACE
MOLECULES
NEBULAE
OXIDES
OXYGEN COMPOUNDS
SILICON COMPOUNDS
SILICON OXIDES
SPACE
STAR EVOLUTION