0.5 Mpc-scale extended X-ray emission in the z=2.48 radio galaxy 4C 23.56

O. Johnson, O. Almaini, P. N. Best, J. Dunlop

Research output: Contribution to journalArticlepeer-review

Abstract

We present an XMM-Newton observation of the radio galaxy 4C 23.56 at z = 2.48 which reveals extended X-ray emission coincident with the radio lobes spanning similar to 0.5 Mpc. These are the largest X-ray-bright lobes known at z > 2. Under the assumption that these features result from inverse-Compton scattering of cosmic microwave background photons by relativistic electrons in the radio source lobes, the measured luminosity of L0.5-8 keV = 7.5 x 10(44) erg s(-1) implies that minimum energy stored within the lobes is similar to 10(59) erg. We discuss the potential of the large-scale radio/X-ray lobes to influence evolution of the host galaxy and protocluster environment at high redshift.

Original languageEnglish
Pages (from-to)151-156
Number of pages6
JournalMonthly Notices of the Royal Astronomical Society
Volume376
Issue number1
DOIs
Publication statusPublished - 21 Mar 2007

Keywords

  • galaxies : evolution
  • galaxies : high-redshift
  • galaxies : individual : 4C 23.56
  • radio continuum : galaxies
  • X-rays : galaxies : clusters
  • DEEP CHANDRA OBSERVATION
  • 4C OBJECTS
  • CLUSTERS
  • SCATTERING
  • CAVITIES
  • JETS
  • HST

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