Black hole growth and starburst activity at z=0.6-4 in the Chandra Deep Field South Host galaxies properties of obscured AGN

被引:94
作者
Brusa, M. [1 ]
Fiore, F. [2 ]
Santini, P. [2 ]
Grazian, A. [2 ]
Comastri, A. [3 ]
Zamorani, G. [3 ]
Hasinger, G. [1 ,4 ]
Merloni, A. [5 ]
Civano, F. [6 ]
Fontana, A. [2 ]
Mainieri, V. [7 ]
机构
[1] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany
[2] Osserv Astron Roma, INAF, I-00040 Rome, Italy
[3] Osservatorio Astron Bologna, INAF, I-40127 Bologna, Italy
[4] Max Planck Inst Plasma Phys, D-85748 Garching, Germany
[5] Excellence Cluster Universe, D-85748 Garching, Germany
[6] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[7] European So Observ, D-85748 Garching, Germany
来源
ASTRONOMY & ASTROPHYSICS | 2009年 / 507卷 / 03期
关键词
galaxies: active; galaxies: starburst; X-rays: galaxies; RAY SPECTRAL PROPERTIES; POINT-SOURCE CATALOGS; GOODS-MUSIC SAMPLE; X-RAY; GALACTIC NUCLEI; MASSIVE GALAXIES; STAR-FORMATION; HIGH-REDSHIFT; LUMINOSITY FUNCTION; COSMOS FIELD;
D O I
10.1051/0004-6361/200912261
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Aims. The co-evolution of host galaxies and the active black holes which reside in their centre is one of the most important topics in modern observational cosmology. Here we present a study of the properties of obscured active galactic nuclei (AGN) detected in the CDFS 1 Ms observation and their host galaxies. Methods. We limited the analysis to the MUSIC area, for which deep K-band observations obtained with ISAAC@VLT are available, ensuring accurate identifications of the counterparts of the X-ray sources as well as reliable determination of photometric redshifts and galaxy parameters, such as stellar masses and star formation rates. In particular, we: 1) refined the X-ray/infrared/optical association of 179 sources in the MUSIC area detected in the Chandra observation; 2) studied the host galaxies observed and rest frame colors and properties. Results. We found that X-ray selected (L-X greater than or similar to 10(42) erg s(-1)) AGN show Spitzer colors consistent with both AGN and starburst dominated infrared continuum; the latter would not have been selected as AGN from infrared diagnostics. The host galaxies of X-ray selected obscured AGN are all massive (M-* > 10(10) M-circle dot) and, in 50% of the cases, are also actively forming stars (1/SSFR < t(Hubble)) in dusty environments. The median L/L-Edd value of the active nucleus is between 2% and 10% depending on the assumed M-BH/M-* ratio. Finally, we found that the X-ray selected AGN fraction increases with the stellar mass up to a value of similar to 30% at z > 1 and M-* > 3 x 10(11) M-circle dot, a fraction significantly higher than in the local Universe for AGN of similar luminosities.
引用
收藏
页码:1277 / U119
页数:20
相关论文
共 94 条
[1]   The Chandra Deep Field North survey. XIII. 2 Ms point-source catalogs [J].
Alexander, DM ;
Bauer, FE ;
Brandt, WN ;
Schneider, DP ;
Hornschemeier, AE ;
Vignali, C ;
Barger, AJ ;
Broos, PS ;
Cowie, LL ;
Garmire, GP ;
Townsley, LK ;
Bautz, MW ;
Chartas, G ;
Sargent, WLW .
ASTRONOMICAL JOURNAL, 2003, 126 (02) :539-574
[2]   The X-ray spectral properties of scuba galaxies [J].
Alexander, DM ;
Bauer, FE ;
Chapman, SC ;
Smail, I ;
Blain, AW ;
Brandt, WN ;
Ivison, RJ .
ASTROPHYSICAL JOURNAL, 2005, 632 (02) :736-750
[3]   The host galaxies and black holes of typical z ∼ 0.5-1.4 AGNs [J].
Alonso-Herrero, Almudena ;
Perez-Gonzalez, Pablo G. ;
Rieke, George H. ;
Alexander, David M. ;
Rigby, Jane R. ;
Papovich, Casey ;
Donley, Jennifer L. ;
Rigopoulou, Dimitra .
ASTROPHYSICAL JOURNAL, 2008, 677 (01) :127-136
[4]   UNIFIED MODELS FOR ACTIVE GALACTIC NUCLEI AND QUASARS [J].
ANTONUCCI, R .
ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1993, 31 :473-521
[5]   SPECTROPOLARIMETRY AND THE NATURE OF NGC-1068 [J].
ANTONUCCI, RRJ ;
MILLER, JS .
ASTROPHYSICAL JOURNAL, 1985, 297 (02) :621-632
[6]   CLASSIFICATION PARAMETERS FOR THE EMISSION-LINE SPECTRA OF EXTRA-GALACTIC OBJECTS [J].
BALDWIN, JA ;
PHILLIPS, MM .
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1981, 93 (551) :5-19
[7]   The fall of active galactic nuclei and the rise of star-forming galaxies: A close look at the Chandra Deep Field X-ray number counts [J].
Bauer, FE ;
Alexander, DM ;
Brandt, WN ;
Schneider, DP ;
Treister, E ;
Hornschemeier, AE ;
Garmire, GP .
ASTRONOMICAL JOURNAL, 2004, 128 (05) :2048-2065
[8]  
Best P. N., 2005, MNRAS, V362, P35
[9]   The XMM-Newton wide-field survey in the COSMOS field.: III.: Optical identification and multiwavelength properties of a large sample of X-ray-selected sources [J].
Brusa, M. ;
Zamorani, G. ;
Comastri, A. ;
Hasinger, G. ;
Cappelluti, N. ;
Civano, F. ;
Finoguenov, A. ;
Mainieri, V. ;
Salvato, M. ;
Vignali, C. ;
Elvis, M. ;
Fiore, F. ;
Gilli, R. ;
Impey, C. D. ;
Lilly, S. J. ;
Mignoli, M. ;
Silverman, J. ;
Trump, J. ;
Urry, C. M. ;
Bender, R. ;
Capak, P. ;
Huchra, J. P. ;
Kneib, J. P. ;
Koekemoer, A. ;
Leauthaud, A. ;
Lehmann, I. ;
Massey, R. ;
Matute, I. ;
McCarthy, P. J. ;
McCracken, H. J. ;
Rhodes, J. ;
Scoville, N. Z. ;
Taniguchi, Y. ;
Thompson, D. .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2007, 172 (01) :353-367
[10]   XMM-Newton observations of Extremely Red Objects and the link with luminous, X-ray obscured quasars [J].
Brusa, M ;
Comastri, A ;
Daddi, E ;
Pozzetti, L ;
Zamorani, G ;
Vignali, C ;
Cimatti, A ;
Fiore, F ;
Mignoli, M ;
Ciliegi, P ;
Röttgering, HJA .
ASTRONOMY & ASTROPHYSICS, 2005, 432 (01) :69-81