The Mid-Infrared Properties of X-Ray Sources
The Mid-Infrared Properties of X-Ray Sources
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DOI：
10.1086/587431
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发表时间：
2006-12
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通讯作者：
V. Gorjian;M. Brodwin;C. S. Kochanek;S. Murray;D. Stern;K. Brand;P. Eisenhardt;M. Ashby;P. Barmby;Michael J. I. Brown;A. Dey;W. Forman;B. Jannuzi;C. Jones;A. Kenter;M. Pahre;Joseph C. Shields;Michael W. Werner;S. Willner
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作者：
V. Gorjian;M. Brodwin;C. S. Kochanek;S. Murray;D. Stern;K. Brand;P. Eisenhardt;M. Ashby;P. Barmby;Michael J. I. Brown;A. Dey;W. Forman;B. Jannuzi;C. Jones;A. Kenter;M. Pahre;Joseph C. Shields;Michael W. Werner;S. Willner
我们将斯皮策IRAC浅层巡天和钱德拉XBoötes对NOAO深宽视场巡天8.5℃Boötes区域的巡天结果结合起来，对中红外和x射线源进行了迄今为止最大规模的比较。比较仅限于x射线通量在0.5-7.0 keV范围内为>8 × 10−15 ergs cm−2 s−1的源和3.6 μm通量比18.4 mag （12.3 μJy）亮的中红外源。在这个最敏感的IRAC波段，基于贝叶斯匹配技术，3086个x射线源中有85%具有中红外对应体，置信度为80%。根据目视检查，只有2.5%的样品根本没有IRAC对应物。即使是钱德拉在同一领域进行的规模较小但深度明显更深的调查，IRAC浅层调查也恢复了大部分x射线源。在所有四个IRAC波段中检测到的大多数（65%）钱德拉源占据IRAC[3.6] -[4.5]与[5.8]-[8.0]色-色空间的明确区域。这些x射线源可能是红外发光的，未遮挡的I型AGN， AGN宿主星系贡献的中红外通量很少。在钱德拉剩余的源中，大多数是较低光度的I型和II型agn，其中红外辐射主要由宿主星系控制，而大约5%是银河系恒星或非常局部的星系。
We combine the results of the Spitzer IRAC Shallow Survey and the Chandra XBoötes Survey of the 8.5 deg2 Boötes field of the NOAO Deep Wide-Field Survey to produce the largest comparison of mid-IR and X-ray sources to date. The comparison is limited to sources with X-ray fluxes >8 × 10−15 ergs cm−2 s−1 in the 0.5-7.0 keV range and mid-IR sources with 3.6 μm fluxes brighter than 18.4 mag (12.3 μJy). In this most sensitive IRAC band, 85% of the 3086 X-ray sources have mid-IR counterparts at an 80% confidence level based on a Bayesian matching technique. Only 2.5% of the sample have no IRAC counterpart at all based on visual inspection. Even for a smaller but a significantly deeper Chandra survey in the same field, the IRAC Shallow Survey recovers most of the X-ray sources. A majority (65%) of the Chandra sources detected in all four IRAC bands occupy a well-defined region of IRAC [3.6] − [4.5] versus [5.8] − [8.0] color-color space. These X-ray sources are likely infrared-luminous, unobscured type I AGNs with little mid-infrared flux contributed by the AGN host galaxy. Of the remaining Chandra sources, most are lower luminosity type I and type II AGNs whose mid-IR emission is dominated by the host galaxy, while approximately 5% are either Galactic stars or very local galaxies.