Evolution of extended extragalactic double radio sources

Details Evolution of extended extragalactic double radio sources Evolution of extended extragalactic double radio sources

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.194.1025s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 194, Mar. 1981, p. 1025-1032.

Astronomy and Astrophysics

Astronomy

28

Binary Stars, Extragalactic Radio Sources, Radio Astronomy, Intergalactic Media, Luminous Intensity, Radiant Flux Density

Scientific paper

A comparison of the flux density ratios s of the two components of extragalactic double radio sources and the ratios r of their angular separations from the associated optical object has been made for the Ooty occultation and 3CR samples. No marked variation is seen in the statistical properties of r and s over a range of flux density exceeding 10 to 1. The distribution of r indicates an average velocity of separation of the two components from the parent object of less than about 0.2c. Simultaneous consideration of the r and s distributions indicates in addition a rapid evolution of the luminosity of radio components with age. Alternatively, the observations can be explained by assuming a non-uniform intergalactic medium with density variations of about a factor of 2 over scales exceeding several tens of kpc.

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