AzTEC/ASTE 1.1-mm survey of SSA22: Counterpart identification and photometric redshift survey of submillimetre galaxies
Issue Date
2014-06-01Author
Umehata, H.
Tamura, Y.
Kohno, K.
Hatsukade, B.
Scott, K. S.
Kubo, M.
Yamada, T.
Ivison, R. J.
Cybulski, R.
Aretxaga, I.
Austermann, J. E.
Hughes, D. H.
Ezawa, H.
Hayashino, T.
Ikarashi, S.
Iono, D.
Kawabe, R.
Matsuda, Y.
Matsuo, H.
Nakanishi, K.
Oshima, T.
Perera, Thushara A.
Takata, T.
Wilson, Graham Wallace
Yun, M. S.
Publisher
Oxford University Press
Type
Article
Article Version
Scholarly/refereed, publisher version
Metadata
Show full item recordAbstract
We present the results from a 1.1-mm imaging survey of the SSA22 field, known for having an overdensity of z = 3.1 Lyman α emitting galaxies (LAEs), taken with the astronomical thermal emission camera (AzTEC) on the Atacama Submillimeter Telescope Experiment (ASTE). We imaged a 950-arcmin^(2) field down to a 1σ sensitivity of 0.7–1.3 mJy beam^(−1) to find 125 submillimetre galaxies (SMGs) with a signal-to-noise ratio ≥3.5. Counterpart identification using radio and near/mid-infrared data was performed and one or more counterpart candidates were found for 59 SMGs. Photometric redshifts based on optical to near-infrared images were evaluated for 45 of these SMGs with Spitzer/IRAC data and the median value is found to be z = 2.4. By combining these estimations with estimates from the literature, we determined that 10 SMGs might lie within the large-scale structure at z = 3.1. The two-point angular cross-correlation function between LAEs and SMGs indicates that the positions of the SMGs are correlated with the z = 3.1 protocluster. These results suggest that the SMGs were formed and evolved selectively in the high dense environment of the high-redshift Universe. This picture is consistent with the predictions of the standard model of hierarchical structure formation.
Description
This article has been accepted for publication in Monthly Notices Of The Royal Astronomical Society ©: 2014 H. Umehata et al. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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Citation
Umehata, H. et al. (2014). "AzTEC/ASTE 1.1-mm survey of SSA22: Counterpart identification and photometric redshift survey of submillimetre galaxies." Monthly Notices Of The Royal Astronomical Society, 40(4):3462-3478. http://www.dx.doi.org/10.1093/mnras/stu447.
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