Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/24225
DC Field | Value | Language |
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dc.contributor.author | Padovani, P. | en_US |
dc.contributor.author | Bonzini, M. | en_US |
dc.contributor.author | Kellermann, K. I. | en_US |
dc.contributor.author | Miller, N. | en_US |
dc.contributor.author | Mainieri, V. | en_US |
dc.contributor.author | TOZZI, Paolo | en_US |
dc.date.accessioned | 2020-04-24T13:23:36Z | - |
dc.date.available | 2020-04-24T13:23:36Z | - |
dc.date.issued | 2015 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/24225 | - |
dc.description | We thank Philip Best, Ed Fomalont, Rachel Somerville, Jasper Wall, and an anonymous referee for helpful comments and discussions and Piero Rosati and Shaji Vattakunnel for their work on the E-CDFS survey. We acknowledge the ESO/GOODS project for the ISAAC and FORS2 data obtained using the Very Large Telescope at the ESO Paranal Observatory under programme ID(s): LP168.A-0485, 170.A-0788, 074.A-0709, 275.A-5060, and 081.A-0525. We made use of the topcat software package (Taylor 2005 ). The VLA is a facility of the National Radio Astronomy Observatory which is operated by Associated Universities, Inc., under a cooperative agreement with the National Science Foundation. This research has made use of NASA's Astrophysics Data System (ADS) Bibliographic Services. | en |
dc.description.abstract | We study the Extended Chandra Deep Field-South Very Large Array sample, which reaches a flux density limit at 1.4 GHz of 32.5 μJy at the field centre and redshift ̃4, and covers ̃0.3 deg<SUP>2</SUP>. Number counts are presented for the whole sample while the evolutionary properties and luminosity functions are derived for active galactic nuclei (AGN). The faint radio sky contains two totally distinct AGN populations, characterized by very different evolutions, luminosity functions, and Eddington ratios: radio-quiet (RQ)/radiative-mode and radio-loud (RL)/jet-mode AGN. The radio power of RQ AGN evolves ̃ ∝(1+z)^{2.5}, similarly to star-forming galaxies, while the number density of RL ones has a peak at z ̃ 0.5 and then declines at higher redshifts. The number density of radio-selected RQ AGN is consistent with that of X-ray selected AGN, which shows that we are sampling the same population. The unbiased fraction of radiative-mode RL AGN, derived from our own and previously published data, is a strong function of radio power, decreasing from ̃0.5 at P<SUB>1.4 GHz</SUB> ̃ 10<SUP>24</SUP> W Hz<SUP>-1</SUP> to ̃0.04 at P<SUB>1.4 GHz</SUB> ̃ 10<SUP>22</SUP> W Hz<SUP>-1</SUP>. Thanks to our enlarged sample, which now includes ̃700 radio sources, we also confirm and strengthen our previous results on the source population of the faint radio sky: star-forming galaxies start to dominate the radio sky only below ̃0.1 mJy, which is also where RQ AGN overtake RL ones. | en_US |
dc.language.iso | eng | en_US |
dc.title | Radio-faint AGN: a tale of two populations | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stv1375 | en_US |
dc.identifier.scopus | 2-s2.0-84940118609 | en_US |
dc.identifier.isi | 000360851900015 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/452/2/1263/1062981 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 452 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 1263 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2015MNRAS.452.1263P | en_US |
dc.relation.ercsector | Scienze Fisiche Settori ERC (ERC) di riferimento::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegherò il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.orcid | 0000-0003-3096-9966 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
Appears in Collections: | 1.01 Articoli in rivista |
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File | Description | Size | Format | |
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stv1375.pdf | PDF editoriale | 1 MB | Adobe PDF | View/Open |
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Items in DSpace are published in Open Access, unless otherwise indicated.