Publication: Spitzer power-law active galactic nucleus candidates in the chandra deep field-north
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2007-05-01
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Abstract
We define a sample of 62 galaxies in the Chandra Deep Field-North whose Spitzer IRAC SEDs exhibit the characteristic power-law emission expected of luminous AGNs. We study the multiwavelength properties of this sample and compare the AGNs selected in this way to those selected via other Spitzer color-color criteria. Only 55% of the power-law galaxies are detected in the X-ray catalog at exposures of >0.5 Ms, although a search for faint emission results in the detection of 85% of the power-law galaxies at the ≥2.5 σ detection level. Most of the remaining galaxies are likely to host AGNs that are heavily obscured in the X-ray. Because the power-law selection requires the AGNs to be energetically dominant in the near- and mid-infrared, the power-law galaxies comprise a significant fraction of the Spitzer-detected AGN population at high luminosities and redshifts. The high 24 μm detection fraction also points to a luminous population. The power-law galaxies comprise a subset of color-selected AGN candidates. A comparison with various mid-infrared color selection criteria demonstrates that while the color-selected samples contain a larger fraction of the X-ray-luminous AGNs, there is evidence that these selection techniques also suffer from a higher degree of contamination by star-forming galaxies in the deepest exposures. Considering only those power-law galaxies detected in the X-ray catalog, we derive an obscured fraction of 68% (2 : 1). Including all of the power-law galaxies suggests an obscured fraction of <81% (4 : 1).
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© 2007 The American Astronomical Society. All rights reserved.
This work was supported by an NSF Graduate Research Fellowship and by NASA through contract 1255094 issued by JPL/California Institute of Technology. We thank the referee for helpful comments that improved the paper.
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Akiyama, M., Ueda, Y., Ohta, K., Takahashi, T., & Yamada, T. 2003, ApJS, 148, 275
Akylas, A., Georgantopoulos, I., Georgakakis, A., Kitsionas, S., & Hatziminaoglou, E. 2006, A&A, 459, 693
Alexander, D. M., Aussel, H., Bauer, F. E., Brandt, W. N., Hornschemeier, A. E., Vignali, C., Garmire, G. P., & Schneider, D. P. 2002, ApJ, 568, L85
Alexander, D. M., Smail, I., Bauer, F. E., Chapman, S. C., Blain, A. W., Brandt, W. N., & Ivison, R. J. 2005, Nature, 434, 738
Alexander, D. M., et al. 2003, AJ, 126, 539
Alonso Herrero, A., et al. 2004, ApJS, 154, 155
———. 2006, ApJ, 640, 167
Appleton, P. N., et al. 2004, ApJS, 154, 147
Armus, L., et al. 2007, ApJ, 656, 148
Ballantyne, D. R., Everett, J. E., & Murray, N. 2006, ApJ, 639, 740
Barger, A. J., Cowie, L. L., Bautz, M. W., Brandt, W. N., Garmire, G. P., Hornschemeier, A. E., Ivison, R. J., & Owen, F. N. 2001, AJ, 122, 2177
Barger, A. J., Cowie, L. L., Brandt, W. N., Capak, P., Garmire, G. P., Hornschemeier, A. E., Steffen, A. T., & Wehner, E. H. 2002, AJ, 124, 1839
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., et al. 2003, AJ, 126, 632
Barmby, P., et al. 2006, ApJ, 642, 126
Bauer, F. E., Alexander, D. M., Brandt, W. N., Schneider, D. P., Treister, E., Hornschemeier, A. E., & Garmire, G. P. 2004, AJ, 128, 2048
Bell, E. F. 2003, ApJ, 586, 794
Bertin, E., & Arnouts, S. 1996, A&AS, 117, 393
Bevington, P. R., & Robinson, D. K. 2003, Data Reduction and Error Analysis for the Physical Sciences (3rd ed.; Boston: McGraw-Hill)
Bohlin, R. C., Savage, B. D., & Drake, J. F. 1978, ApJ, 224, 132
Brand, K., et al. 2006, ApJ, 644, 143
Brandl, B. R., et al. 2006, ApJ, 653, 1129
Brusa, M., et al. 2003, A&A, 409, 65
Capak, P., et al. 2004, AJ, 127, 180
Chapman, S. C., Blain, A. W., Smail, I., & Ivison, R. J. 2005, ApJ, 622, 772
Comastri, A., Fiore, F., Vignali, C., Matt, G., Perola, G. C., & La Franca, F. 2001, MNRAS, 327, 781
Condon, J. J., Cotton, W. D., & Broderick, J. J. 2002, AJ, 124, 675
Cowie, L. L., Barger, A. J., Hu, E. M., Capak, P., & Songaila, A. 2004, AJ, 127, 3137
Dale, D. A., & Helou, G. 2002, ApJ, 576, 159
Dawson, S., McCrady, N., Stern, D., Eckart, M. E., Spinrad, H., Liu, M. C., & Graham, J. R. 2003, AJ, 125, 1236
Devriendt, J. E. G., Guiderdoni, B., & Sadat, R. 1999, A&A, 350, 381
Donley, J. L., Rieke, G. H., Rigby, J. R., & Pérez González, P. G. 2005, ApJ, 634, 169
Duc, P.-A., Mirabel, I. F., & Maza, J. 1997, A&AS, 124, 533
Elvis, M., et al. 1994, ApJS, 95, 1
Farrah, D., Alfonso, J., Efstathiou, A., Rowan-Robinson, M., Fox, M., & Clements, D. 2003, MNRAS, 343, 585
Franceschini, A., et al. 2005, AJ, 129, 2074
Freeman, P. E., Kashyap, V., Rosner, R., & Lamb, D. Q. 2002, ApJS, 138, 185
Frueh, M. L., Corwin, H. G., Jr., de Vaucouleurs, G., & Buta, R. 1996, AJ, 111, 722
Giacconi, R., et al. 2001, ApJ, 551, 624
———. 2002, ApJS, 139, 369
Giavalisco, M., et al. 2004, ApJ, 600, L93
Gilli, R. 2004, Adv. Space Res., 34, 2470
Gilli, R., Salvati, M., & Hasinger, G. 2001, A&A, 366, 407
Gilli, R., et al. 2003, ApJ, 592, 721
Goldader, J. D., Joseph, R. D., Doyon, R., & Sanders, D. B. 1995, ApJ, 444, 97
Gordon, K. D., et al. 2004, Proc. SPIE, 5487, 177
———. 2005, PASP, 117, 503
Granato, G. L., Danese, L., & Franceschini, A. 1997, ApJ, 486, 147
Hasinger, G. 2004, Nucl. Phys. B, 132, 86
Hatziminaoglou, E., et al. 2005, AJ, 129, 1198
Higdon, S. J. U., Armus, L., Higdon, J. L., Soifer, B. T., & Spoon, H. W. W. 2006, ApJ, 648, 323
Hornschemeier, A. E., et al. 2001, ApJ, 554, 742
———. 2003, AJ, 126, 575
Houck, J. R., et al. 2005, ApJ, 622, L105
Huang, J.-S., et al. 2004, ApJS, 154, 44
Imanishi, M. 2006, AJ, 131, 2406
Imanishi, M., Dudley, C. C., & Maloney, P. R. 2006, ApJ, 637, 114
Ivezić, Ž., et al. 2002, AJ, 124, 2364
Ivison, R. J., et al. 2004, ApJS, 154, 124
Johansson, P. H., Väisänen, P., & Vaccari, M. 2004, A&A, 427, 795
Kellermann, K. I., Sramek, R., Schmidt, M., Shaffer, D. B., & Green, R. 1989, AJ, 98, 1195
Klaas, U., Haas, M., Heinrichsen, I., & Schulz, B. 1997, A&A, 325, L21
Koekemoer, A. M., et al. 2004, ApJ, 600, L123
Kuraszkiewicz, J., et al. 2007, ApJ, submitted
Lacy, M., Canalizo, G., Rawlings, S., Sajina, A., Storrie-Lombardi, L., Armus, L., Marleau, F. R., & Muzzin, A. 2005, Mem. Soc. Astron. Italiana, 76, 154
Lacy, M., et al. 2004, ApJS, 154, 166
La Franca, F., et al. 2005, ApJ, 635, 864
Lawrence, A. 1991, MNRAS, 252, 586
Leipski, C., et al. 2005, A&A, 440, L5
Maccacaro, T., Gioia, I. M., Wolter, A., Zamorani, G., & Stocke, J. T. 1988, ApJ, 326, 680
Maccacaro, T., Perola, G. C., & Elvis, M. 1982, ApJ, 257, 47
Maiolino, R., Marconi, A., & Oliva, E. 2001a, A&A, 365, 37
Maiolino, R., Marconi, A., Salvati, M., Risaliti, G., Severgnini, P., Oliva, E., La Franca, F., & Vanzi, L. 2001b, A&A, 365, 28
Maiolino, R., & Rieke, G. H. 1995, ApJ, 454, 95
Maiolino, R., Salvati, M., Bassani, L., Dadina, M., della Ceca, R., Matt, G., Risaliti, G., & Zamorani, G. 1998, A&A, 338, 781
Marble, A. R., Hines, D. C., Schmidt, G. D., Smith, P. S., Surace, J. A., Armus, L., Cutri, R. M., & Nelson, B. O. 2003, ApJ, 590, 707
Martínez Sansigre, A., Rawlings, S., Lacy, M., Fadda, D., Jarvis, M. J., Marleau, F. R., Simpson, C., & Willott, C. J. 2006, MNRAS, 370, 1479
Martínez Sansigre, A., Rawlings, S., Lacy, M., Fadda, D., Marleau, F. R., Simpson, C., Willott, C. J., & Jarvis, M. J. 2005, Nature, 436, 666
McLeod, K. K., & Rieke, G. H. 1994, ApJ, 431, 137
Morrison, G., et al. 2006, preprint (astro-ph/0603412)
Mushotzky, R. F., Cowie, L. L., Barger, A. J., & Arnaud, K. A. 2000, Nature, 404, 459
Neugebauer, G., Oke, J. B., Becklin, E. E., & Matthews, K. 1979, ApJ, 230, 79
Origlia, L., Moorwood, A. F. M., & Oliva, E. 1993, A&A, 280, 536
Page, M. J., et al. 2003, Astron. Nachr., 324, 101
Papovich, C., et al. 2004, ApJS, 154, 70
Pearson, C. 2005, MNRAS, 358, 1417
Percival, W. J., Miller, L., McLure, R. J., & Dunlop, J. S. 2001, MNRAS, 322, 843
Pérez González, P. G., et al. 2005, ApJ, 630, 82
Perola, G. C., et al. 2004, A&A, 421, 491
Polletta, M. d. C., et al. 2006, ApJ, 642, 673
Ptak, A., Heckman, T., Levenson, N. A., Weaver, K., & Strickland, D. 2003, ApJ, 592, 782
Reichert, G. A., Mushotzky, R. F., Holt, S. S., & Petre, R. 1985, ApJ, 296, 69
Richards, E. A. 2000, ApJ, 533, 611
Richards, G. T., et al. 2006, ApJS, 166, 470
Rieke, G. H. 1978, ApJ, 226, 550
Rieke, G. H., Cutri, R. M., Black, J. H., Kailey, W. F., McAlary, C. W., Lebofsky, M. J., & Elston, R. 1985, ApJ, 290, 116
Rieke, G. H., & Lebofsky, M. J. 1981, ApJ, 250, 87
———. 1985, ApJ, 288, 618
Rigby, J. R., Rieke, G. H., Pérez González, P. G., Donley, J. L., Alonso Herrero, A., Huang, J.-S., Barmby, P., & Fazio, G. G. 2005, ApJ, 627, 134
Rigby, J. R., et al. 2004, ApJS, 154, 160
Rigopoulou, D., Spoon, H. W. W., Genzel, R., Lutz, D., Moorwood, A. F. M., & Tran, Q. D. 1999, AJ, 118, 2625
Risaliti, G., Maiolino, R., & Salvati, M. 1999, ApJ, 522, 157
Risaliti, G., et al. 2006, MNRAS, 365, 303
Sajina, A., Lacy, M., & Scott, D. 2005, ApJ, 621, 256
Scoville, N. Z., et al. 2000, AJ, 119, 991
Shi, Y., et al. 2006, ApJ, 653, 127
Silva, L., Granato, G. L., Bressan, A., & Danese, L. 1998, ApJ, 509, 103
Spinoglio, L., & Malkan, M. A. 1989, ApJ, 342, 83
Steffen, A. T., Barger, A. J., Cowie, L. L., Mushotzky, R. F., & Yang, Y. 2003, ApJ, 596, L23
Stern, D., Djorgovski, S. G., Perley, R. A., de Carvalho, R. R., & Wall, J. V. 2000, AJ, 119, 1526
Stern, D., et al. 2005, ApJ, 631, 163
Strecker, D. W., Erickson, E. F., & Witteborn, F. C. 1979, ApJS, 41, 501
Stürm, E., Lutz, D., Tran, D., Feuchtgruber, H., Genzel, R., Kunze, D., Moorwood, A. F. M., & Thornley, M. D. 2000, A&A, 358, 481
Surace, J. A., Sanders, D. B., & Evans, A. E. 2000, ApJ, 529, 170
Swinbank, A. M., Smail, I., Chapman, S. C., Blain, A. W., Ivison, R. J., & Keel, W. C. 2004, ApJ, 617, 64
Szokoly, G. P., et al. 2004, ApJS, 155, 271
Tozzi, P., et al. 2006, A&A, 451, 457
Treister, E., & Urry, C. M. 2005, ApJ, 630, 115
Treister, E., et al. 2004, ApJ, 616, 123
———. 2005, ApJ, 621, 104
———. 2006, ApJ, 640, 603
Ueda, Y., Akiyama, M., Ohta, K., & Miyaji, T. 2003, ApJ, 598, 886
Veilleux, S., Kim, D.-C., & Sanders, D. B. 1999, ApJ, 522, 113
Weedman, D. W., Le Floc’h, E., Higdon, S. J. U., Higdon, J. L., & Houck, J. R. 2006, ApJ, 638, 613
Wilkes, B. J., Pounds, K. A., Schmidt, G. D., Smith, P. S., Cutri, R. M., Ghosh, H., Nelson, B., & Hines, D. C. 2005, ApJ, 634, 183
Wirth, G. D., et al. 2004, AJ, 127, 3121
Worsley, M. A., Fabian, A. C., Barcons, X., Mateos, S., Hasinger, G., & Brunner, H. 2004, MNRAS, 352, L28
Worsley, M. A., Fabian, A. C., Bauer, F. E., Alexander, D. M., Brandt, W. N., & Lehmer, B. D. 2006, MNRAS, 368, 1735
Worsley, M. A., et al. 2005, MNRAS, 357, 1281
Yan, L., et al. 2004, ApJS, 154, 60
———. 2005, ApJ, 628, 604
Yun, M. S., Reddy, N. A., & Condon, J. J. 2001, ApJ, 554, 803