The spatial clustering of X-ray selected AGN in the XMM-COSMOS field
- R. Gilli
- G. Zamorani
- T. Miyaji
- J. Silverman
- M. Brusa
- V. Mainieri
- N. Cappelluti
- E. Daddi
- C. Porciani
- L. Pozzetti
- F. Civano
- A. Comastri
- A. Finoguenov
- F. Fiore
- M. Salvato
- C. Vignali
- G. Hasinger
- S. Lilly
- C. Impey
- J. Trump
- P. Capak
- H. McCracken
- N. Scoville
- Y. Taniguchi
- C. M. Carollo
- T. Contini
- J.-P. Kneib
- O. Le Fevre
- A. Renzini
- M. Scodeggio
- S. Bardelli
- M. Bolzonella
- A. Bongiorno
- K. Caputi
- A. Cimatti
- G. Coppa
- O. Cucciati
- S. de la Torre
- L. de Ravel
- P. Franzetti
- B. Garilli
- A. Iovino
- P. Kampczyk
- C. Knobel
- K. Kovač
- F. Lamareille
- J.-F. Le Borgne
- V. Le Brun
- C. Maier
- M. Mignoli
- R. Pellò
- Y. Peng
- E. Perez Montero
- E. Ricciardelli
- M. Tanaka
- L. Tasca
- L. Tresse
- D. Vergani
- E. Zucca
- U. Abbas
- D. Bottini
- A. Cappi
- P. Cassata
- M. Fumana
- L. Guzzo
- A. Leauthaud
- D. Maccagni
- C. Marinoni
- P. Memeo
- B. Meneux
- P. Oesch
- R. Scaramella
- J. Walcher
DOIAbstract
We study the spatial clustering of 538 X-ray selected AGN in the 2 deg2 XMM-COSMOS field that are spectroscopically identified with $I_{\rm AB}<23$ and span the redshift range $z=0.2{-}3.0$. The median redshift and X-ray luminosity of the sample are $z = 0.98$ and $L_{0.5-10}=6.3\times 10^{43}$ erg s-1, respectively. A strong clustering signal is detected at ~$18\sigma$ level, which is the most significant measurement obtained to date for clustering of X-ray selected AGN. By fitting the projected correlation function $w(r_{\rm p})$ with a power law on scales of $r_{\rm p}=0.3{-}40\,h^{-1}$ Mpc, we derive a best-fit comoving correlation length of $r_0 = 8.6\pm0.5\,h^{-1}$ Mpc and slope of $\gamma=1.88\pm0.07$ (Poissonian errors; bootstrap er...
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