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arXiv 1012.0305astro-ph.CO
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扩展钱德拉深场南的LABOCA巡天-亚毫米星系的无线电和中红外对应物

The LABOCA survey of the Extended Chandra Deep Field South - radio and mid-infrared counterparts to submillimetre galaxies

A. D. Biggs, R. J. Ivison, E. Ibar, J. L. Wardlow, H. Dannerbauer, Ian Smail, F. Walter, A. Weiss, S. C. Chapman, K. E. K. Coppin, C. De Breuck, M. Dickinson, K… 展开作者

A. D. Biggs, R. J. Ivison, E. Ibar, J. L. Wardlow, H. Dannerbauer, Ian Smail, F. Walter, A. Weiss, S. C. Chapman, K. E. K. Coppin, C. De Breuck, M. Dickinson, K. K. Knudsen, V. Mainieri, K. Menten, C. Papovich

摘要:

我们目前的无线电和红外(3.6- 24微米)对应的亚毫米星系(SMG)在扩展的钱德拉深场南与LABOCA 870微米测辐射热计相机上的12米阿塔卡马探路者实验检测。使用1.4GHz的超大阵列和斯皮策,我们已经确定了126个SMG中79个的安全对应物(SNR>3.7,S_870>4.4mJy),其中62个通过无线电和/或24 μ m发射,其余的使用IRAC 3.6和5.8 μ m源上的颜色通量切割,以最大限度地增加安全,重合无线电和24 μ m对应物的数量。在建立射电星表时,我们对“通量提升”的影响进行了校正,然后使用校正后的通量密度来估计基于射电/亚毫米光谱指数的SMG的红移。增强修正的效果是将中值红移增加0.2,从而使安全射电对应物的z值为2.2(+0.7-0.8)(1-sigma误差),与其他光谱和光度研究一致。

英文摘要:

We present radio and infrared (3.6-24um) counterparts to submillimetre galaxies (SMGs) detected in the Extended Chandra Deep Field South with the LABOCA 870-um bolometer camera on the 12-m Atacama Pathfinder Experiment. Using the Very Large Array at 1.4GHz and Spitzer we have identified secure counterparts to 79 of the 126 SMGs (SNR>3.7, S_870>4.4mJy) in the field, 62 via their radio and/or 24-um emission, the remainder using a colour-flux cut on IRAC 3.6- and 5.8-um sources chosen to maximise the number of secure, coincident radio and 24-um counterparts. In constructing our radio catalogue, we have corrected for the effects of `flux boosting', then used the corrected flux densities to estimate the redshifts of the SMGs based on the radio/submm spectral indices. The effect of the boosting correction is to increase the median redshift by 0.2 resulting in a value of z=2.2 (+0.7-0.8) (1-sigma errors) for the secure radio counterparts, in agreement with other studies, both spectroscopic and photometric.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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