Subluminal motion and limb brightening in the nuclear jet of M87

Details Subluminal motion and limb brightening in the nuclear jet of M87 Subluminal motion and limb brightening in the nuclear jet of M87

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...336..112r&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 336, Jan. 1, 1989, p. 112-120.

Astronomy and Astrophysics

Astronomy

97

Active Galactic Nuclei, Extragalactic Radio Sources, Limb Brightening, Radio Jets (Astronomy), Very Long Base Interferometry, Elliptical Galaxies, Flow Velocity, Northern Hemisphere, Virgo Galactic Cluster

Scientific paper

A high dynamic range VLBI map of the 1.6 GHz emission from the nucleus of M87 is presented. The nuclear jet of M87 has a very complex brightness distribution that appears to be strongly limb-brightened with regions characterized by filamentary or sinuous enhancements. The nuclear jet expands perpendicularly to the jet axis and appears to have correlated oscillations in width and centroid position. These phenomena suggest that hydrodynamic instabilities play a role in molding the structure of the jet. Subluminal motion of 0.28c is detected for a bright component in the jet. Such a 'slow' motion is unusual for active galactic nuclei and quasars and it poses considerable difficulty for simple relativistic beaming models.

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