Herschel-ATLAS: Far-infrared properties of radio-loud and radio-quiet quasars

Abstract

We have constructed a sample of radio-loud and radio-quiet quasars from the Faint Im- ages Radio Sky at Twenty-one centimetres (FIRST) and the Sloan Digital Sky Survey Data Release 7 (SDSS DR7), over the H-ATLAS Phase 1 Area (9h, 12h and 14.5h). Using a stacking analysis we find a significant correlation between the far-infrared luminosity and 1.4-GHz luminosity for radio-loud quasars. Partial correlation analysis confirms the intrinsic correlation after removing the redshift contribution while for radio-quiet quasars no partial correlation is found. Using a single-temperature grey-body model we find a general trend of lower dust temperatures in the case of radio-loud quasars comparing to radio-quiet quasars. Also, radio-loud quasars are found to have almost constant mean values of dust mass along redshift and optical luminosity bins. In addition, we find that radio-loud quasars at lower optical luminosities tend to have on average higher FIR and 250-micron luminosity with respect to radio-quiet quasars with the same optical luminosites. Even if we use a two-temperature grey-body model to describe the FIR data, the FIR luminosity excess remains at lower optical luminosities. These results suggest that powerful radio jets are associated with star formation especially at lower accretion rates.

Accepted for publication in MNRAS, 17 pages, 5 figures, 5 tables

References in corpus (14)

• A Catalog of Quasar Properties from SDSS DR7
• Radio-Loudness of Active Galactic Nuclei: Observational Facts and Theoretical Implications
• CRATES: An All-Sky Survey of Flat-Spectrum Radio Sources
• The VLA Low-frequency Sky Survey
• Spitzer Quasar and ULIRG Evolution Study (QUEST): II. The Spectral Energy Distributions of Palomar-Green Quasars
• The Mean Star Formation Rate of X-ray selected Active Galaxies and its Evolution from z=2.5: Results from PEP-Herschel
• Extreme gas kinematics in the z=2.2 powerful radio galaxy MRC1138-262: Evidence for efficient AGN feedback in the early Universe?
• The Radio-Loud Fraction of Quasars is a Strong Function of Redshift and Optical Luminosity
• Signals from the Noise: Image Stacking for Quasars in the FIRST Survey
• Minkowski's Object: A Starburst Triggered by a Radio Jet, Revisited
• The VVDS type-1 AGN sample: The faint end of the luminosity function
• Low accretion rates at the AGN cosmic downsizing epoch
• The Herschel-ATLAS: Evolution of the 250um luminosity function out to z=0.5
• Herschel-ATLAS/GAMA: What determines the far-infrared properties of radio-galaxies?

Cited by in corpus (11)

• LOFAR/H-ATLAS: A deep low-frequency survey of the Herschel-ATLAS North Galactic Pole field
• From Starburst to Quiescence: Testing AGN feedback in Rapidly Quenching Post-Starburst Galaxies
• The MIXR sample: AGN activity versus star formation across the cross-correlation of WISE, 3XMM, and FIRST/NVSS
• Galaxy Evolution in the Radio Band: The Role of Starforming Galaxies and Active Galactic Nuclei
• The mean star formation rates of unobscured QSOs: searching for evidence of suppressed or enhanced star formation
• Radio jets from AGN in dwarf galaxies in the COSMOS survey: mechanical feedback out to redshift $\sim$3.4
• Evidence that the AGN dominates the radio emission in z ~ 1 radio-quiet quasars
• The Largest X-ray Selected Sample of z>3 AGNs: C-COSMOS & ChaMP
• Stellar Signatures of AGN Jet Triggered Star Formation
• Observational evidence that positive and negative AGN feedback depends on galaxy mass and jet power
• The Infrared Medium-Deep Survey II: How to Trigger Radio-AGN? Hints from Their Environments