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首页> 外文期刊>The Astrophysical journal >OTELO SURVEY: DEEP BVRI BROADBAND PHOTOMETRY OF THE GROTH STRIP. II. OPTICAL PROPERTIES OF X-RAY EMITTERS
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OTELO SURVEY: DEEP BVRI BROADBAND PHOTOMETRY OF THE GROTH STRIP. II. OPTICAL PROPERTIES OF X-RAY EMITTERS

机译:OTELO调查:深条纹的BVRI宽带光度法。二。 X射线辐射仪的光学性质

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The Groth field is one of the sky regions that will be targeted by the OSIRIS Tunable Filter Emission Line Object survey in the optical 820 nm and 920 nm atmospheric windows. In the present paper, public Chandra X-ray data with total exposure time of 200 ks are analyzed and combined with optical broadband data of the Groth field, in order to study a set of optical structural parameters of the X-ray emitters and its relation with X-ray properties. To this aim, we processed the raw, public X-ray data using the Chandra Interactive Analysis of Observations, and determined and analyzed different structural parameters, in order to produce a morphological classification of X-ray sources. We present the morphology of 340 X-ray emitters with optical counterpart detected. Objects have been classified by X-ray type using a diagnostic diagram relating X-ray-to-optical ratio (X/O) to hardness ratio. We did not find any clear correlation between X-ray and morphological types. We analyzed the angular clustering of X-ray sources with optical counterpart using two-point correlation functions. A significant positive angular clustering was obtained from a preliminary analysis of four subsamples of the X-ray sources catalog. The clustering signal of the optically extended counterparts is similar to that of strongly clustered populations like red and very red galaxies, suggesting that the environment plays an important role in active galactic nuclei phenomena. Finally, we combined optical structural parameters with other X-ray and optical properties, and we confirmed an anticorrelation between the X/O ratio and the Abraham concentration index, which might suggest that early-type galaxies have lower Eddington rates than those of late-type galaxies.
机译:Groth场是OSIRIS可调滤光片发射线目标测量将在820 nm和920 nm大气窗口中瞄准的天空区域之一。本文分析了总曝光时间为200 ks的公共钱德拉X射线数据,并将其与Groth场的宽带数据相结合,以研究一组X射线发射器的光学结构参数及其关系。具有X射线特性。为此,我们使用Chandra交互式观测分析处理了原始的公共X射线数据,并确定和分析了不同的结构参数,以便对X射线源进行形态分类。我们介绍了340个X射线发射器的形态,并检测到了光学对应物。使用与X射线光学比率(X / O)与硬度比率相关的诊断图,按X射线类型对对象进行了分类。我们没有发现X射线和形态类型之间有任何明显的相关性。我们使用两点相关函数分析了具有光学对应物的X射线源的角度聚类。通过对X射线源目录的四个子样本进行初步分析,获得了显着的正角聚类。光学扩展的对应物的聚类信号类似于红色和非常红色的星系等强聚类种群的聚类信号,表明环境在活跃的银河核现象中起着重要作用。最后,我们将光学结构参数与其他X射线和光学特性相结合,并确定了X / O比与亚伯拉罕浓度指数之间存在反相关关系,这可能表明早期星系的爱丁顿率要比晚期星系的低。类型星系。

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