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arXiv 1409.3574astro-ph.GA
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星系与质量集合体(GAMA):G10/COSMOS区16.6k红移的形成和再分析

Galaxy And Mass Assembly (GAMA): Curation and reanalysis of 16.6k redshifts in the G10/COSMOS region

L. J. M. Davies, S. P. Driver, A. S. G. Robotham, I. K. Baldry, R. Lange, J. Liske, M. Meyer, A. Popping, S. M. Wilkins, A. H. Wright

摘要:

本文讨论了利用宇宙演化巡天(COSMOS)的公开数据构造星系与质量集合体(GAMA)10 h区(G10)的问题,目的是将GAMA巡天扩展到z~1的一个~1度^2场中。为了获得最大数量的高精度光谱红移,我们重新减少所有档案zCOSMOS明亮的数据,并使用GAMA自动互相关红移拟合代码autoz。我们使用所有可用的红移信息(autoz,zCOSMOS明亮10 k,PRIMUS,VVDS,SDSS和光度红移)来计算所有星系的鲁棒最佳拟合红移,并目视检查所有1D和2D光谱,以获得整个COSMOS区域的16,583个鲁棒红移。然后,我们将G10区域定义为COSMOS的中心~1deg^2,它具有相对较高的光谱完整性,并且包含了智利VLA区域。我们定义了一个组合的r <23.0 mag & i <22.0 mag G10样本(选择具有最高的双射重叠),用于进行未来的分析,包含9,861个具有可靠的高精度VLT-VIMOS光谱的源。所有表格、光谱和图像均可在http://ict.icrar.org/cutout/G10上获得。

英文摘要:

We discuss the construction of the Galaxy And Mass Assembly (GAMA) 10h region (G10) using publicly available data in the Cosmic Evolution Survey region (COSMOS) in order to extend the GAMA survey to z~1 in a single ~1 deg^2 field. In order to obtain the maximum number of high precision spectroscopic redshifts we re-reduce all archival zCOSMOS-bright data and use the GAMA automatic cross-correlation redshift fitting code autoz. We use all available redshift information (autoz, zCOSMOS-bright 10k, PRIMUS, VVDS, SDSS and photometric redshifts) to calculate robust best-fit redshifts for all galaxies and visually inspect all 1D and 2D spectra to obtain 16,583 robust redshifts in the full COSMOS region. We then define the G10 region to be the central ~1deg^2 of COSMOS, which has relatively high spectroscopic completeness, and encompasses the CHILES VLA region. We define a combined r < 23.0mag & i < 22.0mag G10 sample (selected to have the highest bijective overlap) with which to perform future analysis, containing 9,861 sources with reliable high precision VLT-VIMOS spectra. All tables, spectra and imaging are available at: http://ict.icrar.org/cutout/G10 .

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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