Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.321..841f&link_type=abstract
Nature (ISSN 0028-0836), vol. 321, June 26, 1986, p. 841, 842. Sponsorship: Ministry of Education, Science, and Culture of Japan
Astronomy and Astrophysics
Astronomy
18
Astronomical Models, Plasma Jets, Precession, Radio Jets (Astronomy), Carbon Monoxide, Extragalactic Radio Sources, Star Formation
Scientific paper
Models for the formation of bipolar jets are discussed with an eye to their tendencies, if any, to further predict precession of the jets. The jets could be formed from a collimated spherical flow accelerated in the polar directions (beam model); by the interaction of an isotropic stellar wind from a proto star with a high-density isothermal disk, producing shock fronts that emanate into polar directions of the disk; MHD wind flow in the funnel formed by a torus around a central object; or, when stellar rotation winds up a magnetic bubble and blows it off in polar directions which precess with the star. Recent observations of L723 and L1551 IRS5 may indicate precession which could be explained by the beam model, or by the precession of a torus or a star, respectively.
Fukue Jun
Yokoo Takeo
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