CALIFA,卡拉尔阿尔托遗产整体领域调查:I。调查报告
CALIFA, the Calar Alto Legacy Integral Field Area survey: I. Survey presentation
摘要:
我们在这里介绍Calar Alto Legacy Integral Field Area(CALIFA)调查,该调查旨在为这一方向提供第一步。我们总结了调查目标和设计,包括样本选择和观测策略。我们还展示了第一次观测运行(2010年6月/7月)期间获得的数据,并概述了缩减管道,质量控制方案和缩减数据的一般特征。本次巡天获得了本宇宙(0.005< z <0.03)中$\sim600$星系直径选定样本的空间分辨光谱信息。CALIFA的设计是为了能够绘制下列数量的二维图:(a)恒星星族:年龄和金属丰度;(b)电离气体:分布、激发机制和化学丰度;(c)运动学特性:恒星和电离气体成分。CALIFA使用PPAK积分场单元(IFU),具有$\sim1.3\sq\arcmin'$的六边形视场,通过采用三点抖动方案具有100%的覆盖因子。光学波长范围覆盖3700至7000 nm,使用两个重叠设置(V500和V1200),具有不同的分辨率:R \sim 850和R \sim 1650。CALIFA是一项针对社区的遗产调查。一旦质量得到保证,将公布缩减后的数据。在一系列质量检查和探索性分析的基础上,分析的数据满足了原始观测方案的预期。我们得出结论,从这第一次看的数据,CALIFA将是一个重要的资源,在本地宇宙的星系考古研究。
英文摘要:
We present here the Calar Alto Legacy Integral Field Area (CALIFA) survey, which has been designed to provide a first step in this direction.We summarize the survey goals and design, including sample selection and observational strategy.We also showcase the data taken during the first observing runs (June/July 2010) and outline the reduction pipeline, quality control schemes and general characteristics of the reduced data. This survey is obtaining spatially resolved spectroscopic information of a diameter selected sample of $\sim600$ galaxies in the Local Universe (0.005< z <0.03). CALIFA has been designed to allow the building of two-dimensional maps of the following quantities: (a) stellar populations: ages and metallicities; (b) ionized gas: distribution, excitation mechanism and chemical abundances; and (c) kinematic properties: both from stellar and ionized gas components. CALIFA uses the PPAK Integral Field Unit (IFU), with a hexagonal field-of-view of $\sim1.3\sq\arcmin'$, with a 100% covering factor by adopting a three-pointing dithering scheme. The optical wavelength range is covered from 3700 to 7000 Å, using two overlapping setups (V500 and V1200), with different resolutions: R\sim850 and R\sim1650, respectively. CALIFA is a legacy survey, intended for the community. The reduced data will be released, once the quality has been guaranteed. The analyzed data fulfill the expectations of the original observing proposal, on the basis of a set of quality checks and exploratory analysis. We conclude from this first look at the data that CALIFA will be an important resource for archaeological studies of galaxies in the Local Universe.
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