4.7 Article

The nature of the jet-driven outflow in the radio galaxy 3C 305

Journal

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 424, Issue 3, Pages 1774-1789

Publisher

OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2012.21247.x

Keywords

galaxies: individual: 3C 305; galaxies: ISM; galaxies: jets; X-rays: galaxies

Funding

  1. Royal Society
  2. NASA [G01-12133A]
  3. Fondazione Angelo Della Riccia
  4. Foundation BLANCEFLOR Boncompagni-Ludovisi, nee Bildt
  5. Science and Technology Facilities Council [ST/J001333/1] Funding Source: researchfish
  6. STFC [ST/J001333/1] Funding Source: UKRI

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We present Chandra X-ray and Very Large Array radio observations of the radio galaxy 3C?305. The X-ray observations reveal the details of the previously known extended X-ray halo around the radio galaxy. We show using X-ray spectroscopy that the X-ray emission is consistent with being shock-heated material and can be modelled with standard collisional-ionization models, rather than being photoionized by the active nucleus. On this basis, we can make a self-consistent model in which the X-ray-emitting plasma is responsible for the depolarization of some regions of the radio emission from the jets and hotspots, and to place lower and upper limits on the magnetic field strength in the depolarizing medium. On the assumption that the X-ray-emitting material, together with the previously known extended emission-line region and the outflow in neutral hydrogen, is all being driven out of the centre of the galaxy by an interaction with the jets, we derive a detailed energy budget for the radio galaxy, showing that the X-ray-emitting gas dominates the other phases in terms of its energy content. The power supplied by the jets must be similar to 1043?erg?s-1.

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