The XXL Survey: XLI. Radio AGN luminosity functions based on the GMRT 610 MHz continuum observations

被引：4

作者：

Slaus, B. ^{[1
]}

Smolcic, V ^{[1
]}

Novak, M. ^{[2
]}

Fotopoulou, S. ^{[3
,4
]}

Ciliegi, P. ^{[5
]}

Jurlin, N. ^{[6
,7
]}

Ceraj, L. ^{[1
]}

Tisanic, K. ^{[1
]}

Birkinshaw, M. ^{[8
]}

Bremer, M. ^{[8
]}

Chiappetti, L. ^{[9
]}

Horellou, C. ^{[10
]}

Huynh, M. ^{[11
,12
]}

Intema, H. ^{[13
]}

Kolokythas, K. ^{[14
]}

Pierre, M. ^{[15
]}

Raychaudhury, S. ^{[16
]}

Rottgering, H. ^{[13
]}

机构：

[1] Univ Zagreb, Fac Sci, Dept Phys, Bijenicka Cesta 32, Zagreb 10000, Croatia

[2] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[3] Univ Durham, Ctr Extragalact Astron, Dept Phys, South Rd, Durham DH1 3LE, England

[4] Univ Geneva, Dept Astron, Ch Ecogia 16, CH-1290 Versoix, Switzerland

[5] INAF Osservatorio Astron Bologna, P Gobetti 93-3, I-40129 Bologna, Italy

[6] ASTRON, Netherlands Inst Radio Astron, Postbus 2, NL-7990 AA Dwingeloo, Netherlands

[7] Univ Groningen, Kapteyn Astron Inst, POB 800, NL-9700 AV Groningen, Netherlands

[8] Univ Bristol, HH Wills Phys Lab, Tyndall Ave, Bristol BS8 1TL, Avon, England

[9] IASF Milano, INAF, Via Corti 12, I-20133 Milan, Italy

[10] Chalmers Univ Technol, Onsala Space Observ, Dept Space Earth & Environm, S-43992 Onsala, Sweden

[11] CSIRO Astron & Space Sci, POB 1130, Bentley, WA 6102, Australia

[12] Univ Western Australia, Int Ctr Radio Astron Res ICRAR, M468,35 Stirling Highway, Crawley, WA 6009, Australia

[13] Leiden Univ, Leiden Observ, Niels Bohrweg 2, NL-2333 CA Leiden, Netherlands

[14] North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa

[15] Univ Paris Diderot, Univ Paris Saclay, Sorbonne Paris Cite, AIM,CEA,CNRS, F-91191 Gif Sur Yvette, France

[16] Interuniv Ctr Astron & Astrophys Ganeshkhind, Post Bag 4, Pune 411007, Maharashtra, India

来源：

ASTRONOMY & ASTROPHYSICS | 2020年 / 638卷

关键词：

galaxies: nuclei; radio continuum: galaxies; accretion; accretion disks; galaxies: evolution; galaxies: active; ACTIVE GALACTIC NUCLEI; NEAR-INFRARED COUNTERPARTS; SUPERMASSIVE BLACK-HOLES; VLA-COSMOS SURVEY; GALAXY PROPERTIES; GAS ACCRETION; DEEP FIELD; 1.4; GHZ; EVOLUTION; IDENTIFICATION;

D O I：

10.1051/0004-6361/201937258

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the space density evolution of active galactic nuclei (AGN) using the 610 MHz radio survey of the XXL-North field, performed with the Giant Metrewave Radio Telescope. The survey covers an area of 30.4 deg(2), with a beamsize of 6.5 arcsec. The survey is divided into two parts, one covering an area of 11.9 deg(2) with 1 sigma rms noise of 200 mu Jy beam(-1) and the other spanning 18.5 deg(2) with rms noise of 45 mu Jy beam(-1). We extracted the catalog of radio components above 7 sigma. The catalog was cross-matched with a multi-wavelength catalog of the XXL-North field (covering about 80% of the radio XXL-North field) using a likelihood ratio method, which determines the counterparts based on their positions and their optical properties. The multi-component sources were matched visually with the aid of a computer code: Multi-Catalog Visual Cross-Matching. A flux density cut above 1 mJy selects AGN hosts with a high purity in terms of star formation contamination based on the available source counts. After cross-matching and elimination of observational biases arising from survey incompletenesses, the number of remaining sources was 1150. We constructed the rest-frame 1.4 GHz radio luminosity functions of these sources using the maximum volume method. This survey allows us to probe luminosities of 23 less than or similar to log(L-1.4 GHz[W Hz(-1)])less than or similar to 28 up to redshifts of z approximate to 2.1. Our results are consistent with the results from the literature in which AGN are comprised of two differently evolving populations, where the high luminosity end of the luminosity functions evolves more strongly than the low-luminosity end.

引用

页数：11