Report
The XMM-Newton Wide-Field Survey in the COSMOS field (XMM-COSMOS): demography and multiwavelength properties of obscured and unobscured luminous AGN
| العنوان: | The XMM-Newton Wide-Field Survey in the COSMOS field (XMM-COSMOS): demography and multiwavelength properties of obscured and unobscured luminous AGN |
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| المؤلفون: | Brusa, M., Civano, F., Comastri, A., Miyaji, T., Salvato, M., Zamorani, G., Cappelluti, N., Fiore, F., Hasinger, G., Mainieri, V., Merloni, A., Bongiorno, A., Capak, P., Elvis, M., Gilli, R., Hao, H., Jahnke, K., Koekemoer, A. M., Ilbert, O., Floc'h, E. Le, Lusso, E., Mignoli, M., Schinnerer, E., Silverman, J. D., Treister, E., Trump, J. D., Vignali, C., Zamojski, M., Aldcroft, T., Aussel, H., Bardelli, S., Bolzonella, M., Cappi, A., Caputi, K., Contini, T., Finoguenov, A., Fruscione, A., Garilli, B., Impey, C. D., Iovino, A., Iwasawa, K., Kampczyk, P., Kartaltepe, J., Kneib, J. P., Knobel, C., Kovac, K., Lamareille, F., Leborgne, J-F., Brun, V. Le, Fevre, O. Le, Lilly, S. J., Maier, C., McCracken, H. J., Pello, R., Peng, Y-J, Perez-Montero, E., de Ravel, L., Sanders, D., Scodeggio, M., Scoville, N. Z., Tanaka, M., Taniguchi, Y., Tasca, L., de la Torre, S., Tresse, L., Vergani, D., Zucca, E. |
| سنة النشر: | 2010 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | We report the final optical identifications of the medium-depth (~60 ksec), contiguous (2 deg^2) XMM-Newton survey of the COSMOS field. XMM-Newton has detected ~800 X-ray sources down to limiting fluxes of ~5x10^{-16}, ~3x10^{-15}, and ~7x10^{-15} erg/cm2/s in the 0.5-2 keV, 2-10 keV and 5-10 keV bands, respectively. The work is complemented by an extensive collection of multi-wavelength data from 24 micron to UV, available from the COSMOS survey, for each of the X-ray sources, including spectroscopic redshifts for ~50% of the sample, and high-quality photometric redshifts for the rest. The XMM and multiwavelength flux limits are well matched: 1760 (98%) of the X-ray sources have optical counterparts, 1711 (~95%) have IRAC counterparts, and 1394 (~78%) have MIPS 24micron detections. Thanks to the redshift completeness (almost 100%) we were able to constrain the high-luminosity tail of the X-ray luminosity function confirming that the peak of the number density of logL_X>44.5 AGN is at z~2. Spectroscopically-identified obscured and unobscured AGN, as well as normal and starforming galaxies, present well-defined optical and infrared properties. We devised a robust method to identify a sample of ~150 high redshift (z>1), obscured AGN candidates for which optical spectroscopy is not available. We were able to determine that the fraction of the obscured AGN population at the highest (L_X>10^{44} erg s^{-1}) X-ray luminosity is ~15-30% when selection effects are taken into account, providing an important observational constraint for X-ray background synthesis. We studied in detail the optical spectrum and the overall spectral energy distribution of a prototypical Type 2 QSO, caught in a stage transitioning from being starburst dominated to AGN dominated, which was possible to isolate only thanks to the combination of X-ray and infrared observations. Comment: ApJ, in press. 59 pages, 14 figures, 2 Tables. A few typos corrected and a reference added. Table 2 is also available at http://www.mpe.mpg.de/XMMCosmos/xmm53_release ; a version of the paper in ApJ format (27 pages) is available at http://www.mpe.mpg.de/XMMCosmos/xmm53_release/brusa_xmmcosmos_optid.pdf |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/0004-637X/716/1/348 |
| URL الوصول: | http://arxiv.org/abs/1004.2790 |
| رقم الانضمام: | edsarx.1004.2790 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/0004-637X/716/1/348 |
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