Near-infrared spectroscopy of powerful compact steep-spectrum radio sources

Abstract

We have obtained near-infrared spectroscopy of a small sample of powerful Compact Steep-Spectrum (CSS) radio sources mainly, but not exclusively, from the 3CR sample. We find no differences between the distributions in the equivalent width and luminosity of the [OIII] 5007A line for our sample and other larger, presumably older, high-redshift 3C objects, suggesting that the underlying quasar luminosity remains roughly constant as quasars age. We also find a possible broad line in 3C241, adding to recent evidence for broad lines in some radio galaxies.

arXiv commentAccepted by MNRAS

References in corpus (16)

• The radio luminosity function from the low-frequency 3CRR, 6CE & 7CRS complete samples
• On the evolution of young radio-loud AGN
• Ionisation, shocks and evolution of the emission line gas of distant 3CR radio galaxies
• The quasar fraction in low-frequency selected complete samples and implications for unified schemes
• The morphology of the emission line region of Compact Steep Spectrum radio sources
• The inevitable youthfulness of known high-redshift radio galaxies
• A new look at the isotropy of narrow line emission in extragalactic radio sources
• A 98% spectroscopically complete sample of the most powerful equatorial radio sources at 408 MHz
• A sample of 6C radio sources designed to find objects at redshift > 4: II --- spectrophotometry and emission line properties
• Compact steep-spectrum sources from the S4 sample
• Thermal-infrared imaging of 3C radio galaxies at z~1
• Deep spectroscopy of z~1 6C radio galaxies - I. The effects of radio power and size on the properties of the emission line gas
• The Molonglo Reference Catalog 1-Jy radio source survey IV. Optical spectroscopy of a complete quasar sample
• Evidence for Ordered Magnetic Fields in the Quasar Environment
• The hyperluminous infrared quasar 3C 318 and its implications for interpreting sub-mm detections of high-redshift radio galaxies
• [OII] Emission, Eigenvector 1 and Orientation in Radio-quiet Quasars

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• Implications for unified schemes from the quasar fraction and emission-line luminosities in radio-selected samples
• Revealing the heavily obscured AGN population of High Redshift 3CRR Sources with Chandra X-ray Observations
• A survey for redshifted molecular and atomic absorption lines - II. Associated HI, OH and millimetre lines in the z >~ 3 Parkes quarter-Jansky flat-spectrum sample
• The black hole mass, Eddington ratio, and M_bh-σ_[O III] relation in young radio galaxies
• The puzzling case of the radio-loud QSO 3C 186: a gravitational wave recoiling black hole in a young radio source?
• Observational Evidence for Young Radio Galaxies are Triggered by Accretion Disk Instability
• Evidence for AGN-driven Outflows in Young Radio Quasars
• Spectroscopic classification, variability and SED of the Fermi-detected CSS 3C 286: the radio-loudest NLS1 galaxy?
• Submillimetre photometry of typical high-redshift radio quasars
• A simplified model of jet power from active galactic nuclei
• The X-ray emission of the most luminous 3CR radio sources
• Multi-frequency VLBA Polarimetry of the high-redshift GPS Quasar OQ172
• The Energetics of the Central Engine in the Powerful Quasar, 3C298
• Radio Properties of Narrow-Line and Broad-Line Seyfert 1 Galaxies