Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.349..140u&link_type=abstract
Nature (ISSN 0028-0836), vol. 349, Jan. 10, 1991, p. 140-142.
Astronomy and Astrophysics
Astronomy
21
Extragalactic Radio Sources, Interstellar Magnetic Fields, Interstellar Matter, Molecular Clouds, Astronomical Models, Filaments, Helical Flow, Orion Constellation, Radio Jets (Astronomy), Rotating Environments, Stellar Evolution
Scientific paper
The Nagoya 4-m radiotelescope has been used to study L1641, a streamer which is a part of the giant molecular-cloud complex ion Orion, lying south of the Kleinmann-Low (KL) nebula. The 110-GHz line of (C-=13)O (J = 1-0) has been used to obtain intensity and velocity data. A dense filament with a helical structure, spinning in the same sense as the gas in the Orion KL region, has been found. A model for this structure is proposed in which the streamer, through the action of the interstellar magnetic field, acts as an angular-momentum drain on the Orion KL region, allowing it to collapse. In this model, the approximately 30 pc long streamer is essential to the formation of the cloud, as well as the formation of stars within the dense cloud.
Fukui Yasuo
Iwata Takahiro
Minoshima Y.
Mizuno Akira
Uchida Yoshiharu
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