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斯皮策河外代表性体积巡天(SERVS):高z SDSS类星体的环境

The Spitzer Extragalactic Representative Volume Survey (SERVS): The Environments of High-z SDSS Quasi-Stellar-Objects

J. T. Falder, J. A. Stevens, Matt J. Jarvis, D. G. Bonfield, M. Lacy, D. Farrah, S. Oliver, J. Surace, J. -C. Mauduit, M. Vaccari, L. Marchetti, E. González-Sol… 展开作者

J. T. Falder, J. A. Stevens, Matt J. Jarvis, D. G. Bonfield, M. Lacy, D. Farrah, S. Oliver, J. Surace, J. -C. Mauduit, M. Vaccari, L. Marchetti, E. González-Solares, J. Afonso, A. Cava, N. Seymour

摘要:

本文介绍了斯皮策河外代表性体积巡天(SERVS)中SDSS类星体(QSO)的环境研究。我们集中在高红移类星体,因为这些还没有被大量研究的数据,这种深度之前。我们使用IRAC 3.6-4.5μm的物体颜色和辅助r波段数据来过滤尽可能多的前景污染。这种方法使我们能够在z ~ 2.0的红移区间内发现类星体周围的星系密度大于4-σ,在z ~ 3.3的红移区间内发现类星体周围的星系密度大于2-σ。我们比较我们的研究结果的半解析星系形成模型的预测,基于ΛCDM千年模拟,并发现两个红移箱,模型预测匹配以及源密度,我们已经从SERVS数据测量。

英文摘要:

This paper presents a study of the environments of SDSS Quasi-Stellar-Objects (QSOs) in the Spitzer Extragalactic Representative Volume Survey (SERVS). We concentrate on the high-redshift QSOs as these have not been studied in large numbers with data of this depth before. We use the IRAC 3.6-4.5μm colour of objects and ancillary r-band data to filter out as much foreground contamination as possible. This technique allows us to find a significant (> 4-σ) over-density of galaxies around QSOs in a redshift bin centred on z ~ 2.0 and a (> 2-σ) over-density of galaxies around QSOs in a redshift bin centred on z ~ 3.3. We compare our findings to the predictions of a semi-analytic galaxy formation model, based on the ΛCDM millennium simulation, and find for both redshift bins that the model predictions match well the source-density we have measured from the SERVS data.

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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