TY - JOUR
T1 - An 80-kpc Ly alpha halo around a high-redshift type-2 quasi-stellar object
AU - Smith, Daniel
AU - Jarvis, M.J.
AU - Simpson, C.
AU - Martinez-Sansigre, A.
N1 - ‘The definitive version is available at: www3.interscience.wiley.com '. Copyright Blackwell Publishing / Royal Astronomical Society. DOI: 10.1111/j.1365-2966.2008.14232.x
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
KW - galaxies: haloes
KW - galaxies: high-redshift
KW - galaxies: jets
KW - accretion
KW - quasars: emission lines
KW - SPITZER-SPACE-TELESCOPE
KW - ACTIVE GALACTIC NUCLEI
KW - SPECTRUM RADIO-SOURCES
KW - COMPACT STEEP-SPECTRUM
KW - EXTRAGALACTIC 1ST
KW - UNIFIED SCHEMES
KW - 1ST-LOOK SURVEY
KW - COLLAPSING PROTOGALAXIES
KW - ENERGY-DISTRIBUTIONS
KW - LUMINOSITY FUNCTION
UR - http://www.scopus.com/inward/record.url?scp=58749086719&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2966.2008.14232.x
DO - 10.1111/j.1365-2966.2008.14232.x
M3 - Article
SN - 0035-8711
VL - 393
SP - 309
EP - 316
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 1
ER -