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arXiv 0911.4246astro-ph.COastro-ph.GA
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WiggleZ暗能量调查:调查设计和首次数据发布

The WiggleZ Dark Energy Survey: Survey Design and First Data Release

Michael J. Drinkwater, Russell J. Jurek, Chris Blake, David Woods, Kevin A. Pimbblet, Karl Glazebrook, Rob Sharp, Michael B. Pracy, Sarah Brough, Matthew Colles… 展开作者

Michael J. Drinkwater, Russell J. Jurek, Chris Blake, David Woods, Kevin A. Pimbblet, Karl Glazebrook, Rob Sharp, Michael B. Pracy, Sarah Brough, Matthew Colless, Warrick J. Couch, Scott M. Croom, Tamara M. Davis, Duncan Forbes, Karl Forster, David G. Gilbank, Michael Gladders, Ben Jelliffe, Nick Jones, I-hui Li, Barry Madore, D. Christopher Martin, Gregory B. Poole, Todd Small, Emily Wisnioski, Ted Wyder, H. K. C. Yee

摘要:

WiggleZ暗能量巡天是对遥远宇宙中240,000个发射线星系的巡天,使用3.9米英澳望远镜(AAT)上的AAOmega摄谱仪进行测量。目标星系是利用GALEX卫星的紫外测光选择的,通量极限为NUV<22.8 mag.90%的星系的红移范围为0.2<z<1.0。巡天的主要目的是精确地测量在4-8 Gyrs的回视时间上印在这些星系空间分布上的重子声学振荡(BAO)的尺度。详细的预测表明,调查将测量BAO规模优于2%,切向和径向声波规模分别约为3%和5%。本文提供了一个详细的描述的调查和设计,以及光谱观测,数据处理,和红移测量技术。它还分析了目标星系的性质,包括发射线诊断,显示它们大多是极端的星暴星系,哈勃太空望远镜的图像显示它们包含很高比例的相互作用或扭曲的系统。结合本文,我们公开了该项目测量的前10万个星系的数据。

英文摘要:

The WiggleZ Dark Energy Survey is a survey of 240,000 emission line galaxies in the distant universe, measured with the AAOmega spectrograph on the 3.9-m Anglo-Australian Telescope (AAT). The target galaxies are selected using ultraviolet photometry from the GALEX satellite, with a flux limit of NUV<22.8 mag. The redshift range containing 90% of the galaxies is 0.2<z<1.0. The primary aim of the survey is to precisely measure the scale of baryon acoustic oscillations (BAO) imprinted on the spatial distribution of these galaxies at look-back times of 4-8 Gyrs. Detailed forecasts indicate the survey will measure the BAO scale to better than 2% and the tangential and radial acoustic wave scales to approximately 3% and 5%, respectively. This paper provides a detailed description of the survey and its design, as well as the spectroscopic observations, data reduction, and redshift measurement techniques employed. It also presents an analysis of the properties of the target galaxies, including emission line diagnostics which show that they are mostly extreme starburst galaxies, and Hubble Space Telescope images, which show they contain a high fraction of interacting or distorted systems. In conjunction with this paper, we make a public data release of data for the first 100,000 galaxies measured for the project.

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