Publication: The evolution of the X-ray luminosity functions of unabsorbed and absorbed AGNs out to z ~ 5
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2015-07-01
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Abstract
We present new measurements of the evolution of the X-ray luminosity functions (XLFs) of unabsorbed and absorbed active galactic nuclei (AGNs) out to z ~ 5. We construct samples containing 2957 sources detected at hard (2-7 keV) X-ray energies and 4351 sources detected at soft (0.5-2 keV) energies from a compilation of Chandra surveys supplemented by wide-area surveys from ASCA and ROSAT. We consider the hard and soft X-ray samples separately and find that the XLF based on either (initially neglecting absorption effects) is best described by a new flexible model parametrization where the break luminosity, normalization, and faint-end slope all evolve with redshift. We then incorporate absorption effects, separately-modelling the evolution of the XLFs of unabsorbed (20 < log N_H < 22) and absorbed (22 < log N_H < 24) AGNs, seeking a model that can reconcile both the hard-and soft-band samples. We find that the absorbed AGN XLF has a lower break luminosity, a higher normalization, and a steeper faint-end slope than the unabsorbed AGN XLF out to z ~ 2. Hence, absorbed AGNs dominate at low luminosities, with the absorbed fraction falling rapidly as luminosity increases. Both XLFs undergo strong luminosity evolution which shifts the transition in the absorbed fraction to higher luminosities at higher redshifts. The evolution in the shape of the total XLF is primarily driven by the changing mix of unabsorbed and absorbed populations.
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© 2015 RAS. We thank the referee for helpful comments that have improved this paper. We also thank Johannes Buchner for helpful discussions and providing machine-readable results. We acknowledge helpful discussions with Ranjan Vasudevan. The scientific results reported in this article are based to a significant degree on observations made by the Chandra X-ray Observatory. This work has made use of the Rainbow Cosmological Surveys Database, which is operated by the Universidad Complutense de Madrid (UCM). This study makes use of data from AEGIS, a multiwavelength sky survey conducted with the Chandra, GALEX, Hubble, Keck, CFHT, MMT, Subaru, Palomar, Spitzer, VLA, and other telescopes and supported in part by the National Science Foundation (NSF), NASA, and the STFC. Funding for the DEEP2 Galaxy Redshift Survey has been provided by NSF grants AST-95-09298, AST-0071048, AST-0507428, and AST-0507483 as well as NASA LTSA grant NNG04GC89G. Funding for the DEEP3 Galaxy Redshift Survey has been provided by NSF grants AST-0808133, AST-0807630, and AST-0806732. This work made use of images and/or data products provided by the NDWFS (Jannuzi & Dey 1999), which is supported by the National Optical Astronomy Observatory (NOAO). NOAO is operated by AURA, Inc., under a cooperative agreement with the NSF. Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the NSF, and the US Department of Energy Office of Science. The SDSS-III web site is http://www.sdss3.org/. SDSS-III is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS-III Collaboration. Based in part on data collected at Subaru Telescope, which is operated by the National Astronomical Observatory of Japan. This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Some of the data used in this paper were obtained from the Mikulski Archive for Space Telescopes (MAST). STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Support for MAST for non-HST data is provided by the NASA Office of Space Science via grant NNX13AC07G and by other grants and contracts. Based in part on observations made with ESO Telescopes at the La Silla or Paranal Observatories. JA acknowledges support from a COFUND Junior Research Fellowship from the Institute of Advanced Study, Durham University, and ERC Advanced Grant FEEDBACK at the University of Cambridge. ALC acknowledges support from NSF CAREER award AST-1055081. AG acknowledges the THALES project 383549 that is jointly funded by the European Union and the Greek Government in the framework of the programme 'Education and lifelong learning'. PGP-G acknowledges support from the Spanish Government through MINECO Grant AYA2012-31277.
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Ahn, C. P., et al. 2012, ApJS, 203, 21
Aird, J., et al. 2012, ApJ, 746, 90
—. 2013a, ApJ, 775, 41
—. 2013b, An Athena+ Supporting Paper (arXiv:1306.2325)
Aird, J., Nandra, K., Georgakakis, A., Laird, E. S., Steidel, C. C., & Sharon, C. 2008, MNRAS, 387, 883
Aird, J., et al. 2010, MNRAS, 401, 2531
Ajello, M., et al. 2008, ApJ, 689, 666
Akiyama, M., et al. 2000, ApJ, 532, 700
Akiyama, M., Ueda, Y., Ohta, K., Takahashi, T., & Yamada, T. 2003, ApJS, 148, 275
Akylas, A., Georgakakis, A., Georgantopoulos, I., Brightman, M., & Nandra, K. 2012, A&A, 546, A98
Akylas, A., Georgantopoulos, I., Georgakakis, A., Kitsionas, S., & Hatziminaoglou, E. 2006, A&A, 459, 693
Alexander, D. M., et al. 2003, AJ, 126, 539
Appenzeller, I., et al. 1998, ApJS, 117, 319
Ashby, M. L. N., et al. 2009, ApJ, 701, 428
Assef, R. J., et al. 2011, ApJ, 728, 56
Ballantyne, D. R. 2014, MNRAS, 437, 2845
Ballantyne, D. R., Draper, A. R., Madsen, K. K., Rigby, J. R., & Treister, E. 2011, ApJ, 736, 56
Banerji, M., Alaghband-Zadeh, S., Hewett, P. C., & McMahon, R. G. 2015, MNRAS, 447, 3368
Barcons, X., Mateos, S., & Ceballos, M. T. 2000, MNRAS, 316, L13
Barger, A. J., et al. 2003, AJ, 126, 632
Barger, A. J., Cowie, L. L., Mushotzky, R. F., Yang, Y., Wang, W.-H., Steffen, A. T., & Capak, P. 2005, AJ, 129, 578
Barger, A. J., Cowie, L. L., & Wang, W.-H. 2008, ApJ, 689, 687
Barro, G., et al. 2011a, ApJS, 193, 13
—. 2011b, ApJS, 193, 30
Bongiorno, A., et al. 2012, MNRAS, 427, 3103
Brammer, G. B., van Dokkum, P. G., & Coppi, P. 2008, ApJ, 686, 1503
Brand, K., et al. 2006, ApJ, 641, 140
Brandt, W. N., & Alexander, D. M. 2015, A&A Rev., 23, 1
Brightman, M., & Nandra, K. 2011a, MNRAS, 413, 1206
—. 2011b, MNRAS, 414, 3084
Brightman, M., Nandra, K., Salvato, M., Hsu, L.-T., Aird, J., & Rangel, C. 2014, MNRAS, 443, 1999
Brightman, M., & Ueda, Y. 2012, MNRAS, 423, 702
Brusa, M., et al. 2010, ApJ, 716, 348
—. 2007, ApJS, 172, 353
Buchner, J., et al. 2015, ApJ, in press
—. 2014, A&A, 564, A125
Burlon, D., Ajello, M., Greiner, J., Comastri, A., Merloni, A., & Gehrels, N. 2011, ApJ, 728, 58
Calzetti, D., Armus, L., Bohlin, R. C., Kinney, A. L., Koornneef, J., & Storchi-Bergmann, T. 2000, ApJ, 533, 682
Capak, P., et al. 2007, ApJS, 172, 99
Cardamone, C. N., Urry, C. M., Schawinski, K., Treister, E., Brammer, G., & Gawiser, E. 2010a, ApJ, 721, L38
Cardamone, C. N., et al. 2010b, ApJS, 189, 270
Ciliegi, P., Zamorani, G., Hasinger, G., Lehmann, I., Szokoly, G., & Wilson, G. 2003, A&A, 398, 901
Civano, F., et al. 2011, ApJ, 741, 91
—. 2012, ApJS, 201, 30
Coil, A. L., et al. 2011, ApJ, 741, 8
Comastri, A., Gilli, R., Marconi, A., Risaliti, G., & Salvati, M. 2015, A&A, 574, L10
Comastri, A., et al. 2011, A&A, 526, L9
Cooper, M. C., et al. 2011, ApJS, 193, 14
—. 2012, MNRAS, 425, 2116
Cowie, L. L., Barger, A. J., Hu, E. M., Capak, P., & Songaila, A. 2004, AJ, 127, 3137
Del Moro, A., et al. 2014, ApJ, 786, 16
Delvecchio, I., et al. 2014, MNRAS, 439, 2736
Dickey, J. M., & Lockman, F. J. 1990, ARA&A, 28, 215
Donley, J. L., Rieke, G. H., Pérez González, P. G., & Barro, G. 2008, ApJ, 687, 111
Draper, A. R., & Ballantyne, D. R. 2009, ApJ, 707, 778
Dwelly, T., & Page, M. J. 2006, MNRAS, 372, 1755
Ebrero, J., et al. 2009, A&A, 493, 55
Elston, R. J., et al. 2006, ApJ, 639, 816
Elvis, M., et al. 2009, ApJS, 184, 158
Feroz, F., Hobson, M. P., & Bridges, M. 2009, MNRAS, 398, 1601
Fiore, F., et al. 2012, A&A, 537, A16
Fischer, J.-U., Hasinger, G., Schwope, A. D., Brunner, H., Boller, T., Trümper, J., Voges, W., & Neizvestnyj, S. 1998, Astronomische Nachrichten, 319, 347
Gendreau, K. C., et al. 1995, PASJ, 47, L5
Georgakakis, A., Nandra, K., Laird, E. S., Aird, J., & Trichas, M. 2008, MNRAS, 388, 1205
Georgakakis, A., Rowan-Robinson, M., Babbedge, T. S. R., & Georgantopoulos, I. 2007, MNRAS, 377, 203
Georgakakis, A. E., Chavushyan, V., Plionis, M., Georgantopoulos, I., Koulouridis, E., Leonidaki, I., & Mercado, A. 2006, MNRAS, 367, 1017
Georgantopoulos, I., et al. 2013, A&A, 555, A43
Gilli, R., Comastri, A., & Hasinger, G. 2007, A&A, 463, 79
Goulding, A. D., et al. 2012, ApJS, 202, 6
Grazian, A., et al. 2006, A&A, 449, 951
Hasinger, G. 2008, A&A, 490, 905
Hasinger, G., Miyaji, T., & Schmidt, M. 2005, A&A, 441, 417
Hickox, R. C., & Markevitch, M. 2007, ApJ, 661, L117
Hiroi, K., Ueda, Y., Akiyama, M., & Watson, M. G. 2012, ApJ, 758, 49
Hopkins, P. F., Hernquist, L., Cox, T. J., Robertson, B., Di Matteo, T., & Springel, V. 2006, ApJ, 639, 700
Hopkins, P. F., Richards, G. T., & Hernquist, L. 2007, ApJ, 654, 731
Hsu, L.-T., et al. 2014, ApJ, 796, 60
Ichikawa, K., Ueda, Y., Terashima, Y., Oyabu, S., Gandhi, P., Matsuta, K., & Nakagawa, T. 2012, ApJ, 754, 45
Ilbert, O., et al. 2009, ApJ, 690, 1236
Jannuzi, B. T., & Dey, A. 1999, in Astronomical Society of the Pacific Conference Series, Vol. 191, Photometric Redshifts and the Detection of High Redshift Galaxies, ed. R. Weymann, L. Storrie-Lombardi, M. Sawicki, & R. Brunner, 111
Jeffreys, H. 1961, Theory of probability (Clarendon Press)
Kass, R. E., & Raftery, A. E. 1995, Journal of the American Statistical Association, 90, 773
Kochanek, C. S., et al. 2012, ApJS, 200, 8
La Franca, F., et al. 2005, ApJ, 635, 864
Laird, E. S., et al. 2009, ApJS, 180, 102
Laird, E. S., Nandra, K., Hobbs, A., & Steidel, C. C. 2006, MNRAS, 373, 217
Lasker, B. M., et al. 2008, AJ, 136, 735
Lehmer, B. D., et al. 2005, ApJS, 161, 21
—. 2012, ApJ, 752, 46
Lilly, S. J., et al. 2009, ApJS, 184, 218
Loredo, T. J. 2004, in American Institute of Physics Conference Series, Vol. 735, American Institute of Physics Conference Series, ed. R. Fischer, R. Preuss, & U. V. Toussaint, 195–206
Luo, B., et al. 2010, ApJS, 187, 560
Madau, P., & Dickinson, M. 2014, ARA&A, 52, 415
Magdziarz, P., & Zdziarski, A. A. 1995, MNRAS, 273, 837
Marconi, A., Risaliti, G., Gilli, R., Hunt, L. K., Maiolino, R., & Salvati, M. 2004, MNRAS, 351, 169
McCracken, H. J., et al. 2010, ApJ, 708, 202
Mendez, A. J., et al. 2013, ApJ, 770, 40
Merloni, A., et al. 2012, (arXiv:1209.3114)
Mineo, S., Gilfanov, M., Lehmer, B. D., Morrison, G. E., & Sunyaev, R. 2014, MNRAS, 437, 1698
Miyaji, T., et al. 2015, ApJ in press (arXiv:1503.00056)
Miyaji, T., Hasinger, G., & Schmidt, M. 2000, A&A, 353, 25
—. 2001, A&A, 369, 49
Moretti, A., et al. 2009, Astronomy & Astrophysics, 493, 501
Murray, S. S., et al. 2005, ApJS, 161, 1
Nandra, K., et al. 2013, (arXiv:1306.2307)
—. 2015, ApJS in press, (arXiv:1503.09078)
Nandra, K., O’Neill, P. M., George, I. M., & Reeves, J. N. 2007, MNRAS, 382, 194
Pérez González, P. G., et al. 2005, ApJ, 630, 82
—. 2008, ApJ, 675, 234
Polletta, M., et al. 2007, ApJ, 663, 81
Ptak, A., Mobasher, B., Hornschemeier, A., Bauer, F., & Norman, C. 2007, ApJ, 667, 826
Puccetti, S., et al. 2009, ApJS, 185, 586
Ranalli, P., Comastri, A., & Setti, G. 2003, A&A, 399, 39
Reddy, N. A., Steidel, C. C., Erb, D. K., Shapley, A. E., & Pettini, M. 2006, ApJ, 653, 1004
Ross, N. P., et al. 2013, ApJ, 773, 14
Ross, R. R., & Fabian, A. C. 2005, MNRAS, 358, 211
Salvato, M., et al. 2009, ApJ, 690, 1250
—. 2011, ApJ, 742, 61
Sanders, D. B., et al. 2007, ApJS, 172, 86
Schulze, A., et al. 2015, MNRAS, 447, 2085
Schwope, A., et al. 2000, Astronomische Nachrichten, 321, 1
Shankar, F., Weinberg, D. H., & Miralda Escudé, J. 2013, MNRAS, 428, 421
Silverman, J. D., et al. 2008, ApJ, 679, 118
Skilling, J. 2004, in AIP Conference Proceedings of the 24th International Workshop on Bayesian Inference and Maximum Entropy Methods in Science and Engineering, Vol. 735, 395–405
Soltan, A. 1982, MNRAS, 200, 115
Steidel, C. C., Adelberger, K. L., Shapley, A. E., Pettini, M., Dickinson, M., & Giavalisco, M. 2003, ApJ, 592, 728
Stern, D., et al. 2012, ApJ, 753, 30
Tozzi, P., et al. 2006, A&A, 451, 457
Treister, E., Urry, C. M., & Virani, S. 2009, ApJ, 696, 110
Trouille, L., Barger, A. J., Cowie, L. L., Yang, Y., & Mushotzky, R. F. 2008, ApJS, 179, 1
Tueller, J., Mushotzky, R. F., Barthelmy, S., Cannizzo, J. K., Gehrels, N., Markwardt, C. B., Skinner, G. K., & Winter, L. M. 2008, ApJ, 681, 113
Tzanavaris, P., & Georgantopoulos, I. 2008, A&A, 480, 663
Ueda, Y., Akiyama, M., Hasinger, G., Miyaji, T., & Watson, M. G. 2014, ApJ, 786, 104
Ueda, Y., Akiyama, M., Ohta, K., & Miyaji, T. 2003, ApJ, 598, 886
Ueda, Y., et al. 2011, PASJ, 63, 937
Ueda, Y., Ishisaki, Y., Takahashi, T., Makishima, K., & Ohashi, T. 2001, ApJS, 133, 1
Ueda, Y., et al. 1999, ApJ, 518, 656
Vasudevan, R. V., Mushotzky, R. F., & Gandhi, P. 2013, ApJ, 770, L37
Vito, F., Gilli, R., Vignali, C., Comastri, A., Brusa, M., Cappelluti, N., & Iwasawa, K. 2014, MNRAS, 445, 3557
Vito, F., et al. 2013, MNRAS, 428, 354
Winter, L. M., Mushotzky, R. F., Reynolds, C. S., & Tueller, J. 2009, ApJ, 690, 1322
Wirth, G. D., et al. 2004, AJ, 127, 3121
Worsley, M. A., Fabian, A. C., Bauer, F. E., Alexander, D. M., Brandt, W. N., & Lehmer, B. D. 2006, MNRAS, 368, 1735
Xue, Y. Q., et al. 2010, ApJ, 720, 368
—. 2011, ApJS, 195, 10
—. 2012, ApJ, 758, 129
Yencho, B., Barger, A. J., Trouille, L., & Winter, L. M. 2009, ApJ, 698, 380
York, D. G., et al. 2000, AJ, 120, 1579
Young, M., et al. 2012, ApJ, 748, 124