CS around Orion-KL: A large rotating disk

Journal Article · Wed Aug 01 04:00:00 EDT 1984 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/162280· OSTI ID:6259961

Hasegawa, T; Kaifu, N; Inatani, J; Morimoto, M; Chikada, Y; Hirabayashi, H; Iwashita, H; Morita, K; Tojo, A; Akabane, K

J = 1-0 emission of CS and C/sup 34/S around Orion-KL has been mapped with an angular resolution of 33''. The region of large CS integrated intensity has a single maximum near the KL nebula and is elongated NE-SW. The peak velocity shows a systematic shift along the axis of the elongated feature. This is consistent with an existence of a large rotating disk around the KL nebula. The disk is 4 x 10/sup 4/ AU (0.2 pc) in diameter and is rotating with a period of 5 x 10/sup 5/ yr x sin i, where i is the inclination. The disk seems to be still collapsing with a time scale of 3 x 10/sup 5/ yr x sin i. The axis of the disk coincides with the directions of the high-velocity outflow of gas from Orion-KL; the disk may be responsible for the bipolar nature of the flow.

• Research Organization: Nobeyama Radio Observatory, Tokyo Astronomical Observatory, University of Tokyo
• OSTI ID: 6259961
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 283:1; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON COMPOUNDS
CARBON SULFIDES
CHALCOGENIDES
COSMIC GASES
EMISSION SPECTRA
ENERGY-LEVEL TRANSITIONS
FLUIDS
GASES
MAPS
MOTION
NEBULAE
RADIAL VELOCITY
ROTATION
SPECTRA
SULFIDES
SULFUR COMPOUNDS
VELOCITY