The Radio Galaxy Messier 87

Volume 530 of the series Lecture Notes in Physics pp 56-65


The large-scale structure of virgo A

  • Uli KleinAffiliated withRadioastronomisches Institut der Universität Bonn

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The large-scale structure of the nearby radio galaxy Vir A is reviewed. It is argued that epochs of varying activity are also manifest on large scales. The radio sources exhibits three basic components: the inner bright lobes (projected size ∼5 kpc), the intermediate lobes (∼30 kpc), and the outer diffuse lobes (∼80 kpc). It seems difficult to reconcile these features, which have rather different brightnesses, energy densities and spectra, with a jet that had constant thrust and orientation over the past 108 yrs.