IDENTIFICATION OF 1.4 MILLION ACTIVE GALACTIC NUCLEI IN THE MID-INFRARED USING WISE DATA
IDENTIFICATION OF 1.4 MILLION ACTIVE GALACTIC NUCLEI IN THE MID-INFRARED USING WISE DATA
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DOI：
10.1088/0067-0049/221/1/12
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发表时间：
2015-09
期刊：
影响因子：
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通讯作者：
N. Secrest;R. Dudik;B. Dorland;N. Zacharias;V. Makarov;A. Fey;J. Frouard;C. Finch
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文献类型：
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作者：
N. Secrest;R. Dudik;B. Dorland;N. Zacharias;V. Makarov;A. Fey;J. Frouard;C. Finch
我们提出了一个全天空的样本101.4万活动星系核（AGN）满足双色红外光度选择标准AGN适用于来源的广域红外巡天探测器最终目录发布（AllWISE）。我们评估的空间分布和光学性质，我们的样品，发现结果是一致的预期活动星系核。这些源在天空中的平均密度为每平方度138个活动星系核，视星等分布的峰值为g = 20，延伸到g = 26的天体。我们用大量光学鉴定的恒星样本来检验活动星系核的选择标准，并确定“泄漏”率（即在光学巡天中检测到的星星在我们的样本中被误认为类星体（QSO）的概率）≤4.0 × 10−5。我们的结论是，我们的样本几乎不包含光学识别的恒星（≤0.041%），使这个样本非常有希望为未来的天体参考系工作，因为它显着增加了全天空，紧凑的河外天体的数量。我们进一步将我们的样本与已知活动星系核/类星体的星表进行比较，发现当活动星系核的亮度超过极限星等R <$19时，完整性值为<$84%（即正确识别已知活动星系核/类星体的概率至少为84%）。我们的样本包括大约110万个以前未编目的活动星系核。
We present an all-sky sample of ≈1.4 million active galactic nuclei (AGNs) meeting a two-color infrared photometric selection criteria for AGNs as applied to sources from the Wide-field Infrared Survey Explorer final catalog release (AllWISE). We assess the spatial distribution and optical properties of our sample and find that the results are consistent with expectations for AGNs. These sources have a mean density of ≈38 AGNs per square degree on the sky, and their apparent magnitude distribution peaks at g ≈ 20, extending to objects as faint as g ≈ 26. We test the AGN selection criteria against a large sample of optically identified stars and determine the “leakage” (that is, the probability that a star detected in an optical survey will be misidentified as a quasi-stellar object (QSO) in our sample) rate to be ≤4.0 × 10−5. We conclude that our sample contains almost no optically identified stars (≤0.041%), making this sample highly promising for future celestial reference frame work as it significantly increases the number of all-sky, compact extragalactic objects. We further compare our sample to catalogs of known AGNs/QSOs and find a completeness value of ≳84% (that is, the probability of correctly identifying a known AGN/QSO is at least 84%) for AGNs brighter than a limiting magnitude of R ≲ 19. Our sample includes approximately 1.1 million previously uncataloged AGNs.