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arXiv 0812.3588astro-ph
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在XMM-LSS场中对AGN进行了多波长测量:I.通过KX技术选择类星体

A multi-wavelength survey of AGN in the XMM-LSS field: I. Quasar selection via the KX technique

Th. Nakos, J. P. Willis, S. Andreon, J. Surdej, P. Riaud, E. Hatziminaoglou, O. Garcet, D. Alloin, M. Baes, G. Galaz, M. Pierre, H. Quintana, M. J. Page, J. A. … 展开作者

Th. Nakos, J. P. Willis, S. Andreon, J. Surdej, P. Riaud, E. Hatziminaoglou, O. Garcet, D. Alloin, M. Baes, G. Galaz, M. Pierre, H. Quintana, M. J. Page, J. A. Tedds, M. T. Ceballos, A. Corral, J. Ebrero, M. Krumpe, S. Mateos

摘要:

目的:我们提出了一个样本的候选类星体选择使用KX技术。该数据覆盖了X射线多镜(XMM)大尺度结构(LSS)调查区域的0.68 deg^2,其中重叠的多波长成像数据允许对选定源的物理性质进行调查。方法:KX方法根据类星体的光学(R和z ')到近红外(Ks)光度学和点状形态来识别类星体。我们将这些数据与光学(u*,g 'r',i ',z')和中红外(3.6-24微米)波段相结合,重建候选类星体的光谱能量分布(SED)。结果:在用KX方法选出的93个候选类星体中,有25个通过随后的SED分析被归类为类星体。光谱观测可用于12/25的这些来源,并在每种情况下证实类星体的假设。更重要的是,90%的SED分类类星体显示出X射线发射,这是KX选择的样本中任何错误候选者都没有的属性。在没有光谱学的情况下对这些源进行光度红移分析表明,被归类为类星体的25个源占据了0.7 < z < 2.5的区间。剩下的68/93来源被归类为恒星和未解决的星系。

英文摘要:

AIMS: We present a sample of candidate quasars selected using the KX-technique. The data cover 0.68 deg^2 of the X-ray Multi-Mirror (XMM) Large-Scale Structure (LSS) survey area where overlapping multi-wavelength imaging data permits an investigation of the physical nature of selected sources. METHODS: The KX method identifies quasars on the basis of their optical (R and z') to near-infrared (Ks) photometry and point-like morphology. We combine these data with optical (u*,g'r',i',z') and mid-infrared (3.6-24 micron) wavebands to reconstruct the spectral energy distributions (SEDs) of candidate quasars. RESULTS: Of 93 sources selected as candidate quasars by the KX method, 25 are classified as quasars by the subsequent SED analysis. Spectroscopic observations are available for 12/25 of these sources and confirm the quasar hypothesis in each case. Even more, 90% of the SED-classified quasars show X-ray emission, a property not shared by any of the false candidates in the KX-selected sample. Applying a photometric redshift analysis to the sources without spectroscopy indicates that the 25 sources classified as quasars occupy the interval 0.7 < z < 2.5. The remaining 68/93 sources are classified as stars and unresolved galaxies.

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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