The Parsec-Scale Nucleus and Jets of Hydra A

  • Gregory B. Taylor
Conference paper
Part of the International Astronomical Union book series (IAUS, volume 175)


Sensitive, high-resolution VLBA observations of the nuclear region of Hydra A are presented at 1.3, 5 and 15 GHz. Hydra A (3C218) is an outstanding example of a high-luminosity FRI radio galaxy embedded within a cooling flow cluster. VLA observations by Taylor & Perley (1993) have demonstrated extremely high (>5000 radians m−2) Faraday rotation measures (RMs) and a striking RM and depolarization asymmetry between the northern and southern radio lobes. In view of this asymmetry on the kpc-scale Hydra A appears remarkably symmetric on the pc-scale in the radio continuum. Hydra A is also unusual in that the 21 cm atomic Hydrogen line is seen in absorption against the nucleus.


Position Angle Faraday Rotation Radio Galaxy Radio Continuum Extragalactic Radio Source 
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Copyright information

© International Astronomical Union 1996

Authors and Affiliations

  • Gregory B. Taylor
    • 1
  1. 1.NRAOSocorroUSA

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