AzTEC half square degree survey of the SHADES fields - I. Maps, catalogues and source counts

被引:108
作者
Austermann, J. E. [1 ,2 ]
Dunlop, J. S. [3 ,4 ]
Perera, T. A. [1 ]
Scott, K. S. [1 ]
Wilson, G. W. [1 ]
Aretxaga, I. [5 ]
Hughes, D. H. [5 ]
Almaini, O. [6 ]
Chapin, E. L. [4 ]
Chapman, S. C. [7 ]
Cirasuolo, M. [3 ]
Clements, D. L. [8 ]
Coppin, K. E. K. [9 ]
Dunne, L. [6 ]
Dye, S. [10 ]
Eales, S. A. [10 ]
Egami, E. [11 ]
Farrah, D. [12 ,13 ]
Ferrusca, D. [5 ]
Flynn, S. [10 ]
Haig, D. [10 ]
Halpern, M.
Ibar, E. [14 ]
Ivison, R. J. [3 ,14 ]
van Kampen, E. [15 ]
Kang, Y. [16 ]
Kim, S. [16 ]
Lacey, C.
Lowenthal, J. D. [17 ]
Mauskopf, P. D. [10 ]
McLure, R. J. [3 ]
Mortier, A. M. J. [3 ]
Negrello, M. [18 ]
Oliver, S. [12 ]
Peacock, J. A. [3 ]
Pope, A. [19 ]
Rawlings, S. [20 ]
Rieke, G. [11 ]
Roseboom, I. [12 ]
Rowan-Robinson, M. [8 ]
Scott, D. [4 ]
Serjeant, S. [16 ]
Smail, I. [9 ]
Swinbank, A. M. [9 ]
Stevens, J. A. [21 ]
Velazquez, M. [5 ]
Wagg, J. [22 ]
Yun, M. S. [1 ]
机构
[1] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA
[2] Univ Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309 USA
[3] Univ Edinburgh, Royal Observ, SUPA, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland
[4] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada
[5] INAOE, Puebla 72000, Mexico
[6] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England
[7] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England
[8] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England
[9] Univ Durham, Inst Computat Cosmol, Durham DH1 3LE, England
[10] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, Wales
[11] Univ Arizona, Dept Astron, Tucson, AZ 85721 USA
[12] Univ Sussex, Ctr Astron, Brighton BN1 9QH, E Sussex, England
[13] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA
[14] UK Astron Technol Ctr, Royal Observ, Edinburgh EH9 3HJ, Midlothian, Scotland
[15] ESO, D-85748 Garching, Germany
[16] Sejong Univ, Dept Astron & Space Sci, Seoul, South Korea
[17] Smith Coll, Dept Astron, Northampton, MA 01063 USA
[18] Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, England
[19] Natl Opt Astron Observ, Tucson, AZ 85719 USA
[20] Univ Oxford, Dept Astrophys, Oxford OX1 3RH, England
[21] Univ Hertfordshire, Ctr Astrophys Res, Sci & Technol Res Ctr, Hatfield AL10 9AB, Herts, England
[22] Natl Radio Astron Observ, Socorro, NM 87801 USA
基金
美国国家科学基金会; 加拿大自然科学与工程研究理事会;
关键词
surveys; galaxies: evolution; cosmology: miscellaneous; submillimetre; DEGREE EXTRAGALACTIC SURVEY; GOODS-N FIELD; SUBMILLIMETER GALAXY POPULATION; 1200-MU-M MAMBO SURVEY; SCUBA SUPER-MAP; 1.1 MM SURVEY; NUMBER COUNTS; HIGH-REDSHIFT; LOCKMAN HOLE; DEEP-FIELD;
D O I
10.1111/j.1365-2966.2009.15620.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present the first results from the largest deep extragalactic mm-wavelength survey undertaken to date. These results are derived from maps covering over 0.7 deg2, made at lambda = 1.1 mm, using the AzTEC continuum camera mounted on the James Clerk Maxwell Telescope. The maps were made in the two fields originally targeted at lambda = 850 mu m with the Submillimetre Common-User Bolometer Array (SCUBA) in the SCUBA Half-Degree Extragalactic Survey (SHADES) project, namely the Lockman Hole East (mapped to a depth of 0.9-1.3 mJy rms) and the Subaru/XMM-Newton Deep Field (mapped to a depth of 1.0-1.7 mJy rms). The wealth of existing and forthcoming deep multifrequency data in these two fields will allow the bright mm source population revealed by these new wide-area 1.1 mm images to be explored in detail in subsequent papers. Here, we present the maps themselves, a catalogue of 114 high-significance submillimetre galaxy detections, and a thorough statistical analysis leading to the most robust determination to date of the 1.1 mm source number counts. These new maps, covering an area nearly three times greater than the SCUBA SHADES maps, currently provide the largest sample of cosmological volumes of the high-redshift Universe in the mm or sub-mm. Through careful comparison, we find that both the Cosmic Evolution Survey (COSMOS) and the Great Observatories Origins Deep Survey (GOODS) North fields, also imaged with AzTEC, contain an excess of mm sources over the new 1.1 mm source-count baseline established here. In particular, our new AzTEC/SHADES results indicate that very luminous high-redshift dust enshrouded starbursts (S(1.1mm) > 3 mJy) are 25-50 per cent less common than would have been inferred from these smaller surveys, thus highlighting the potential roles of cosmic variance and clustering in such measurements. We compare number count predictions from recent models of the evolving mm/sub-mm source population to these sub-mm bright galaxy surveys, which provide important constraints for the ongoing refinement of semi-analytic and hydrodynamical models of galaxy formation, and find that all available models overpredict the number of bright submillimetre galaxies found in this survey.
引用
收藏
页码:160 / 176
页数:17
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