English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/169664
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Clustering of X-ray selected active galactic nuclei

AuthorsCarrera, Francisco J. ; Barcons, Xavier ; Fabian, A. C.; Hasinger, Günther; Mason, Keith O.; McMahon, Richard G.; Mittaz, J. P. D.; Page, M. J.
Galaxies: active
Galaxies: clusters: general
X-rays: genera
Large scale structure of Universe
Quasars: general
Issue Date1998
PublisherOxford University Press
CitationMonthly Notices of the Royal Astronomical Society 299(1): 229-236 (1998)
AbstractA total of 235 active galactic nuclei (AGN) from two different soft X-ray surveys [the ROSAT Deep Survey (DRS) and the ROSAT International X-ray Optical Survey (RIXOS)] with redshifts between 0 and 3.5 are used to study the clustering of X-ray selected AGN and its evolution. A 2σ significant detection of clustering of such objects is found on scales < 40-80 h-1 Mpc in the RIXOS sample, while no clustering is detected on any scales in the DRS sample. Assuming a single power-law model for the spatial correlation function (SCF), quantitative limits on the AGN clustering have been obtained: a comoving correlation length 1.5 ≲ r0 ≲ 3.3 h-1 Mpc is implied for comoving evolution, while 1.9 ≲ r0 ≲ 4.8 for stable clustering and 2.2 ≲ r0 ≲ 5.5 for linear evolution. These values are consistent with the correlation lengths and evolutions obtained for galaxy samples, but imply smaller amplitude or faster evolution than recent ultraviolet and optically selected AGN samples. We also constrain the ratio of bias parameters between X-ray selected AGN and IRAS galaxies to be ≲1.7 on scales ≲ 10 h-1 Mpc, a somewhat smaller value than is inferred from local large-scale dynamical studies.
Publisher version (URL)https://doi.org/10.1046/j.1365-8711.1998.01767.x
Identifiersdoi: 10.1046/j.1365-8711.1998.01767.x
issn: 0035-8711
e-issn: 1365-2966
Appears in Collections:(IFCA) Artículos
Files in This Item:
File Description SizeFormat 
clusnucle.pdf514,78 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.