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| Paper: |
Active Galactic Nuclei in Massive Galaxies at High Redshift |
| Volume: |
408, The Starburst−AGN Connection |
| Page: |
445 |
| Authors: |
Yamada, T.; MOIRCS Deep Survey Team |
| Abstract: |
We investigate the X-ray properties of the K-band-selected galaxies at redshift 2 < z < 4 by using our deep near-infrared images obtained in the MOIRCS Deep Survey project and the published Chandra X-ray source catalog. 61 X-ray sources with the 2-10 keV luminosity LX = 1042−1044 erg s−1 are identified with the K-selected galaxies and we found that they are exclusively (90%) associated with the massive objects with stellar mass larger than 1010.5 Mʘ. On the other hand, the AGN detection rate among the very massive galaxies with the stellar mass larger than 1011 Mʘ is high, 33% (26/78). The active duration in the AGN duty cycle of the high-redshift massive galaxies seems large. |
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