A deep ATCA 20 cm radio survey of the AKARI Deep Field South near the South Ecliptic Pole
A deep ATCA 20 cm radio survey of the AKARI Deep Field South near the South Ecliptic Pole
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对南黄道附近 AKARI 深场南进行的深 ATCA 20 厘米无线电勘测
DOI：
10.1111/j.1365-2966.2012.21684.x
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发表时间：
2012
影响因子：
4.8
通讯作者：
G.,......Hanami,H.他
中科院分区：
文献类型：
--
作者：
White;G.,......Hanami,H.他
本文报道了利用澳大利亚望远镜紧凑阵（ATCA）对南极（SEP）附近AKARI深场南（ADF-S）地区进行的20厘米波段深射电观测结果。该勘测（以下简称ATCA-ADFS勘测）的1σ探测极限范围为18.7至50 μJy波束-1，覆盖面积为1.1 deg 2，灵敏度为1.5 deg 2。本文介绍了观测、数据处理和源计数分析，沿着了总体科学目标的说明，以及一个包含530个射电源的目录，其分辨率为6.2 × 4.9弧秒。派生的差分源计数显示了一个显着的超过101 mJy微弱的源，与新兴的恒星形成星系的人口相一致。交叉相关的无线电与AKARIssues和档案数据，我们发现95交叉匹配，与大多数星系的opticalR-星等范围在18-24等，类似于其他光学深场识别中发现的，和52个组件躺在1弧秒内的无线电位置在至少一个进一步的目录（红外或光学）。我们已经报告了我们目录中的一个子样本的红移，发现它们在本地宇宙中的星系和那些红移高达0.825的星系之间存在差异。将射电源与24 μm的斯皮策星表相关联，我们在一个斯皮策像素内发现了173个匹配，其中一小部分识别样本与大部分星系相比明显是射电响亮的。射电光度图和颜色分析表明，大多数射电源实际上是发光的恒星形成星系，而不是射电响亮的活动星系核（AGN）。此外，在阿塔卡马亚毫米望远镜实验（ASTE）或星载大孔径亚毫米望远镜（BLAST）星系与本次巡天的射电源之间还有5个交叉匹配，其中两个也在90 μm处被检测到，还有41个与赫歇尔多层河外巡天（爱马仕）公共数据发布中检测到的亚毫米源交叉匹配。
The results of a deep radio survey at 20 cm wavelength are reported for a region containing theAKARIDeep Field South (ADF-S) near the South Ecliptic Pole (SEP), using the Australia Telescope Compact Array (ATCA). The survey (hereafter referred to as the ATCA-ADFS survey) has 1σ detection limits ranging from 18.7 to 50 μJy beam−1over an area of ∼1.1 deg2, and ∼2.5 deg2to lower sensitivity. The observations, data reduction and source count analysis are presented along with a description of the overall scientific objectives, and a catalogue containing 530 radio sources detected with a resolution of 6.2 × 4.9 arcsec. The derived differential source counts show a pronounced excess of sources fainter than ∼1 mJy, consistent with an emerging population of star-forming galaxies. Cross-correlating the radio withAKARIsources and archival data we find 95 cross-matches, with most galaxies having opticalR-magnitudes in the range 18–24 mag, similar to that found in other optical deep field identifications, and 52 components lying within 1 arcsec of a radio position in at least one further catalogue (either IR or optical). We have reported redshifts for a sub-sample of our catalogue finding that they vary between galaxies in the local Universe and those having redshifts of up to 0.825. Associating the radio sources with theSpitzercatalogue at 24 μm, we find 173 matches within oneSpitzerpixel, of which a small sample of the identifications are clearly radio loud compared to the bulk of the galaxies. The radio luminosity plot and a colour–colour analysis suggest that the majority of the radio sources are in fact luminous star-forming galaxies rather than radio-loud active galactic nuclei (AGN). There are additionally five cross-matches between the Atacama Submillimetre Telescope Experiment (ASTE) or the Balloon-borne Large Aperture Submillimetre Telescope (BLAST) galaxies and radio sources from this survey, two of which are also detected at 90 μm, and 41 cross-matches with submillimetre sources detected in theHerschelMulti-tiered Extragalactic Survey (HerMES) Public Data release.