Evidence for the flattening of extra-galactic jets

Details Evidence for the flattening of extra-galactic jets Evidence for the flattening of extra-galactic jets

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.207p..41s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 207, April 1, 1984, p. 41P-44P. Research supported by t

Astronomy and Astrophysics

Astrophysics

5

Astrophysics, Extragalactic Radio Sources, Radio Jets (Astronomy), Brightness, Flattening, Magnetic Effects, Shock Waves

Scientific paper

It is shown how the constant opening angle of the Centaurus A jet can arise from a pressure-confined fluid jet of non-circular cross-section. The slow decrease in surface brightness is predicted even for a pure adiabatic expansion. Evidence for flattening in other jets is discussed. Internal shocks will produce linear structures such as observed in the M87 jet. Magnetic pressure will eventually dominate, resulting in focusing and a return to a circular cross-section. Conversely, shocks may be the catalyst for further flattening.

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