Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.222..365s&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 222, Sept. 15, 1986, p. 365-372. SERC-supported researc
Astronomy and Astrophysics
Astronomy
14
Emission Spectra, Flow Velocity, Plasma Jets, Quasars, Radio Jets (Astronomy), Kelvin-Helmholtz Instability, Magnetohydrodynamic Flow, Nonrelativistic Mechanics, Red Shift, Stellar Models
Scientific paper
VLA observations of the quasar 0800 + 608 (redshift, z = 0.689) show that it has a remarkable one-sided jet, and an apparently uncollimated structure on the opposite side of the radio/optical core. Such structure is difficult to reconcile with a model in which two symmetric oppositely directed jets are present. The jet itself displays a number of evenly spaced emission-knots, a pseudosinusoidal wiggle and a large-scale bend. This well-defined structure can be compared with analytical models and numerical simulations of jets. If the knots and wiggle can be attributed to MHD Kelvin-Helmholtz pinching and helical modes respectively, then the jet's flow speed is likely to be hypersonic, and its density is greater than that of its surroundings. The latter is consistent with the jet's lack of any well-defined lobe or cocoon.
Browne Ian W. A.
Shone David L.
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