Differential rotation near the orion-kleinmann-low region: Aperture synthesis observations of HCN emission

Journal Article · Sun Sep 15 04:00:00 EDT 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/163478· OSTI ID:6077747

Vogel, S N; Bieging, J H; Plambeck, R L; Welch, W J; Wright, M C.H.

We have mapped the 88.6 GHz J = 1-0 transition of HCN toward the Orion-Kleinmann-Low nebula with an angular resolution of 6'' using the Hat Creek interferometer. We detect systematic gradients in the velocity of the molecular ''ridge'' gas across a 1 region centered near the BN and IRc2 infrared cluster. Approaching IRc2 from the south, the ridge velocity decreases from V/sub LSR/roughly-equal 8 to 6 km s , but from the north it increases from V/sub LSR/roughly-equal 10 to 11 km s . We interpret the velocity gradient as rotation of the cloud complex. The rotation curve is consistent with a density distribution in which the cloud mass increases linearly with distance from IRc2.

• Research Organization: Radio Astronomy Laboratory, University of California, Berkeley
• OSTI ID: 6077747
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 296:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CYANOGEN
EMISSION
INTERFEROMETRY
INTERSTELLAR GRAINS
MAPS
MOTION
NEBULAE
PARTICLES
ROTATION