An 80-kpc Ly alpha halo around a high-redshift type-2 quasi-stellar object

Daniel Smith, M.J. Jarvis, C. Simpson, A. Martinez-Sansigre

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)
42 Downloads (Pure)

Abstract

We announce the discovery of an extended emission line region associated with a high redshift type-2 QSO. The halo, which was discovered in our new wide-field narrow-band survey, resides at z = 2.85 in the Spitzer First Look Survey region and is extended over 80 kpc. Deep VLBI observations imply that approximately 50 per cent of the radio emission is extended on scales > 200pc. The inferred AGN luminosity is sufficient to ionize the extended halo, and the optical emission is consistent with being triggered coevally with the radio source. The Lyman- α halo is as luminous as those found around high redshift radio galaxies, however the active nucleus is several orders of magnitude less luminous at radio wavelengths than those FRIIs more commonly associated with extended emission line regions. AMS05 appears to be a highredshift analogue to the radio-quiet quasar E1821+643which is core dominated but which also exhibits extended FRI-like structure and contains an optically powerfulAGN.
Original languageEnglish
Pages (from-to)309-316
Number of pages8
JournalMonthly Notices of the Royal Astronomical Society
Volume393
Issue number1
DOIs
Publication statusPublished - 2009

Keywords

  • galaxies: haloes
  • galaxies: high-redshift
  • galaxies: jets
  • accretion
  • quasars: emission lines
  • SPITZER-SPACE-TELESCOPE
  • ACTIVE GALACTIC NUCLEI
  • SPECTRUM RADIO-SOURCES
  • COMPACT STEEP-SPECTRUM
  • EXTRAGALACTIC 1ST
  • UNIFIED SCHEMES
  • 1ST-LOOK SURVEY
  • COLLAPSING PROTOGALAXIES
  • ENERGY-DISTRIBUTIONS
  • LUMINOSITY FUNCTION

Fingerprint

Dive into the research topics of 'An 80-kpc Ly alpha halo around a high-redshift type-2 quasi-stellar object'. Together they form a unique fingerprint.

Cite this