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arXiv 1507.00736astro-ph.GA
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Kilo-Degree巡天内的星系演化

Galaxy evolution within the Kilo-Degree Survey

C. Tortora, N. R. Napolitano, F. La Barbera, N. Roy, M. Radovich, F. Getman, M. Brescia, S. Cavuoti, M. Capaccioli, G. Longo, the KiDS collaboration

摘要:

欧洲南方天文台公共千度巡天(英语:Public Kilo-Degree Survey,KiDS)是一项利用VLT巡天望远镜和OmegaCAM相机进行的光学宽视场成像巡天。KiDS将在四个光学滤波器(u,g,r,i)中扫描1500平方度。由于VST的高空间分辨率、良好的视宁度和光度深度,它被设计为弱透镜巡天,是星系演化研究的理想选择。表面光度学已经提供了结构参数(例如大小和Sérsic指数),孔径和总星等已经被用于从机器学习方法和从恒星星族合成中获得恒星质量/光度红移。我们的项目旨在研究质量和环境达到红移$z \sim 0.5$及以上的星系的颜色和结构特性的演化,以限制星系的演化过程,如星系合并。

英文摘要:

The ESO Public Kilo-Degree Survey (KiDS) is an optical wide-field imaging survey carried out with the VLT Survey Telescope and the OmegaCAM camera. KiDS will scan 1500 square degrees in four optical filters (u, g, r, i). Designed to be a weak lensing survey, it is ideal for galaxy evolution studies, thanks to the high spatial resolution of VST, the good seeing and the photometric depth. The surface photometry have provided with structural parameters (e.g. size and Sérsic index), aperture and total magnitudes have been used to derive photometric redshifts from Machine learning methods and stellar masses/luminositites from stellar population synthesis. Our project aimed at investigating the evolution of the colour and structural properties of galaxies with mass and environment up to redshift $z \sim 0.5$ and more, to put constraints on galaxy evolution processes, as galaxy mergers.

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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