HerMES: Halo Occupation Number and Bias Properties of Dusty Galaxies from Angular Clustering Measurements

Asantha Cooray , A. Amblard , L. Wang , B. Altieri (1) , V. Arumugam , R. Auld , H. Aussel (2) , T. Babbedge , A. Blain , J. Bock , A. Boselli (3) , V. Buat (3) , D. Burgarella (3) , N. Castro-Rodriguez , A. Cava (2) , P. Chanial (4) , D. L. Clements , A. Conley (5) , L. Conversi , C. D. Dowell (2) , E. Dwek , S. Eales , D. Elbaz (6) , D. Farrah , M. Fox , A. Franceschini (7) , W. Gear , J. Glenn , M. Griffin (8) , M. Halpern , E. Hatziminaoglou (2) , E. Ibar , K. Isaak , R. J. Ivison (9) , A. A. Khostovan , Guilaine Lagache , L. Levenson , N. Lu (10) , S. Madden , B. Maffei , G. Mainetti , L. Marchetti (11, 12) , G. Marsden , K. Mitchell-Wynne , A. M. J. Mortier , H. T. Nguyen (13, 14) , B. O'Halloran , S. J. Oliver , A. Omont (15) , M. J. Page (16) , P. Panuzzo , A. Papageorgiou , C. P. Pearson (17) , I. Pérez-Fournon , M. Pohlen , J. I. Rawlings , G. Raymond (12) , D. Rigopoulou , D. Rizzo , I. G. Roseboom , M. Rowan-Robinson , M. Sanchez Portal , B. Schulz , Douglas Scott , P. Serra , N. Seymour , D. L. Shupe , A. J. Smith (18) , J. A. Stevens , M. Symeonidis , M. Trichas , K. E. Tugwell , M. Vaccari , I. Valtchanov (2) , J. D. Vieira , L. Vigroux , R. Ward , Gavin Wright , C. K. Xu (19) , M. Zemcov (2)

1 XMM-Newton Science Operations Centre
2 AUTRES
3 LAM - Laboratoire d'Astrophysique de Marseille
4 DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée
5 Department of Astronomy and Astrophysics [Universty of Toronto]
6 AIM (UMR7158 / UMR_E_9005 / UM_112) - Astrophysique Interprétation Modélisation
7 LCMD - Laboratoire Colloïdes et Matériaux Divisés
8 School of Physics and Astronomy [Cardiff]
9 ROE - Royal Observatory Edinburgh
10 Division of Engineering
11 SCP - Service de Chimie Physique
12 SIMaP - Science et Ingénierie des Matériaux et Procédés
13 LPN - Laboratoire de photonique et de nanostructures
14 CRPP - Centre de recherches Paul Pascal
15 IAP - Institut d'Astrophysique de Paris
16 Department of Chemistry and Biochemistry
17 NIWA - National Institute of Water and Atmospheric Research [Wellington]
18 BAS - British Antarctic Survey
19 LMRS - Laboratoire de Mathématiques Raphaël Salem

We measure the angular correlation function, w(theta), from 0.5 to 30 arcminutes of detected sources in two wide fields of the Herschel Multi-tiered Extragalactic Survey (HerMES). Our measurements are consistent with the expected clustering shape from a population of sources that trace the dark matter density field, including non-linear clustering at arcminute angular scales arising from multiple sources that occupy the same dark matter halos. By making use of the halo model to connect the spatial clustering of sources to the dark matter halo distribution, we estimate source bias and halo occupation number for dusty sub-mm galaxies at z ~ 2. We find that sub-mm galaxies with 250 micron flux densities above 30 mJy reside in dark matter halos with mass above (5\pm4) x 10^12 M_sun, while (14\pm8)% of such sources appear as satellites in more massive halos.

Domaines: Astrophysique galactique [astro-ph.GA]; Astrophysique galactique [astro-ph.GA]

Asantha Cooray, A. Amblard, L. Wang, B. Altieri, V. Arumugam, et al.. HerMES: Halo Occupation Number and Bias Properties of Dusty Galaxies from Angular Clustering Measurements. 2010. ⟨hal-00662767⟩