| Description |
We propose Herschel observations of a complete sample of 3C radio-galaxies and quasars at redshift z<1. For all sources Spitzer mid-IR spectra are available. The aim is to quantify the orientation-dependence of AGN radiation (AGN unification), to investigate the interplay between accretion onto the central black-hole and star-formation in the hosts, and to understand the evolution of the black-hole/stellar-bulge relation. The low-frequency radio-selection provides us with powerful and massive active galaxies free from any orientation/obscuration bias, a requirement for testing AGN unification. The properties of the 3C sources are well known throughout the electromagnetic spectrum, except in the far-IR/sub-mm, where most of them were hitherto outside the capability of space missions to reach reliable measurements. We propose PACS 70-160 micron photometry of 72 sources supplemented by SPIRE 250-500 micron photometry of 11 sufficiently bright sources, in order to measure their detailed spectral energy distributions between available Spitzer and SCUBA/MAMBO data. Depending on redshift of the sources and predicted flux, the filter choice is optimised to provide best rest-frame FIR coverage. The rest-frame FIR emission serves as an isotropic calorimeter and the MIR/FIR luminosity ratio is determined by the relative strength of the AGN and star-forming contributions combined with dust obscuration. These observations will return crucial new information on the energy processes in powerful AGN and their hosts at z<1, providing an essential anchor for studies of galaxy and AGN evolution, in particular for a consistent comparison with Herschel observations of several (radio-loud) AGN samples at cosmic epochs z>1. |
| Publication |
The post-Herschel view of intrinsic AGN emission: constructing templates for galaxy and AGN emission at IR wavelengths . Bernhard E. et al. . Monthly Notices of the Royal Astronomical Society . null . null . 2021MNRAS.503.2598B ,
Star Formation in 3CR Radio Galaxies and Quasars at z < 1 . Westhues Christian et al. . The Astronomical Journal, Volume 151, Issue 5, article id. 120, 53 pp. (2016). . 151 . 10.3847\/0004-6256\/151\/5\/120 . 2016AJ....151..120W ,
Quantifying the cool ISM in radio AGNs: evidence for late-time retriggering by galaxy mergers and interactions . Bernhard E. et al. . Monthly Notices of the Royal Astronomical Society . null . null . 2022MNRAS.512...86B ,
BAT AGN Spectroscopic Survey. XI. The Covering Factor of Dust and Gas in Swift/BAT Active Galactic Nuclei . Ichikawa Kohei et al. . The Astrophysical Journal, Volume 870, Issue 1, article id. 31, 16 pp. (2019). . 870 . 10.3847\/1538-4357\/aaef8f . 2019ApJ...870...31I ,
AGN impact on the molecular gas in galactic centres as probed by CO lines . Esposito Federico et al. . Monthly Notices of the Royal Astronomical Society . null . null . 2022MNRAS.512..686E ,
Star Formation Suppression Due to Jet Feedback in Radio Galaxies with Shocked Warm Molecular Gas . Lanz Lauranne et al. . The Astrophysical Journal, Volume 826, Issue 1, article id. 29, 40 pp. (2016). . 826 . 10.3847\/0004-637X\/826\/1\/29 . 2016ApJ...826...29L ,
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