SDSS-III: MASSIVE SPECTROSCOPIC SURVEYS OF THE DISTANT UNIVERSE, THE MILKY WAY, AND EXTRA-SOLAR PLANETARY SYSTEMS
SDSS-III: MASSIVE SPECTROSCOPIC SURVEYS OF THE DISTANT UNIVERSE, THE MILKY WAY, AND EXTRA-SOLAR PLANETARY SYSTEMS
复制标题
SDSS-III：对遥远宇宙、银河系和太阳系外行星系统的大规模光谱调查
DOI：
10.1088/0004-6256/142/3/72
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发表时间：
2011-09-01
影响因子：
5.3
通讯作者：
Zhao, Bo
中科院分区：
文献类型：
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作者：
Eisenstein, Daniel J.;Weinberg, David H.;Zhao, Bo
SDSS-III建立在斯隆数字巡天（SDSS-I和II）的基础上，是一个关于三个科学主题的四个光谱巡天计划：暗能量和宇宙学参数，银河系的历史和结构，以及其他恒星周围的巨行星的人口。按照SDSS的传统，SDSS-III将定期公开发布其所有数据，从SDSS数据发布8（DR 8）开始，该数据发布8于2011年1月公开，包括SDSS-I和SDSS-II图像和光谱，这些图像和光谱经过最新的管道和校准处理，用于SDSS-III调查。本文概述了构成SDSS-III的四项调查。重子振荡光谱巡天将测量150万个大质量星系的红移和150，000个类星体的Ly α森林光谱，利用大尺度结构的重子声学振荡特征，在z < 0.7和z接近2.5的情况下获得距离尺度和哈勃膨胀率的X-射线水平测定。SEGUE-2是已经完成的SDSS-III调查，是SDSS-II斯隆银河系理解和探索扩展（SEGUE）的延续，测量了中等分辨率（R = λ/λ Δ近似1800）各种目标类别中118，000颗恒星的光谱，探测化学演化，恒星运动学和子结构，以及从太阳附近到100千秒差距的暗物质晕的质量分布。APOGEE，阿帕奇点天文台银河演化实验，将获得高分辨率（R约30，000），高信噪比（S/N >= 100/分辨率元件），H波段（1.51 μ m <λ < 1.70 μ m）光谱的105个演化，晚型恒星，测量每颗星星大约15种元素的丰度，并使用一套统一的恒星示踪剂和光谱诊断法对所有银河系恒星群（球、棒、盘、晕）进行首次高精度光谱调查。APO多目标径向速度系外行星大面积巡天（MARVELS）将监测8000多颗FGK恒星的径向速度，其灵敏度和节奏（10-40 ms（-1），相当于每颗星星24次访问）是探测周期长达两年的巨行星所需的，为了解巨行星系统的形成和动态演化提供了前所未有的数据集。截至2011年1月，SDSS-III已经获得了超过240，000个星系，29，000个z >= 2.2类星体和140，000颗恒星的光谱，其中包括MARVELS对2580颗恒星的74，000次速度测量。
Building on the legacy of the Sloan Digital Sky Survey (SDSS-I and II), SDSS-III is a program of four spectroscopic surveys on three scientific themes: dark energy and cosmological parameters, the history and structure of the Milky Way, and the population of giant planets around other stars. In keeping with SDSS tradition, SDSS-III will provide regular public releases of all its data, beginning with SDSS Data Release 8 (DR8), which was made public in 2011 January and includes SDSS-I and SDSS-II images and spectra reprocessed with the latest pipelines and calibrations produced for the SDSS-III investigations. This paper presents an overview of the four surveys that comprise SDSS-III. The Baryon Oscillation Spectroscopic Survey will measure redshifts of 1.5 million massive galaxies and Ly alpha forest spectra of 150,000 quasars, using the baryon acoustic oscillation feature of large-scale structure to obtain percent-level determinations of the distance scale and Hubble expansion rate at z < 0.7 and at z approximate to 2.5. SEGUE-2, an already completed SDSS-III survey that is the continuation of the SDSS-II Sloan Extension for Galactic Understanding and Exploration (SEGUE), measured medium-resolution (R = lambda/lambda Delta approximate to 1800) optical spectra of 118,000 stars in a variety of target categories, probing chemical evolution, stellar kinematics and substructure, and the mass profile of the dark matter halo from the solar neighborhood to distances of 100 kpc. APOGEE, the Apache Point Observatory Galactic Evolution Experiment, will obtain high-resolution (R approximate to 30,000), high signal-to-noise ratio (S/N >= 100 per resolution element), H-band (1.51 mu m < lambda < 1.70 mu m) spectra of 105 evolved, late-type stars, measuring separate abundances for similar to 15 elements per star and creating the first high-precision spectroscopic survey of all Galactic stellar populations (bulge, bar, disks, halo) with a uniform set of stellar tracers and spectral diagnostics. The Multi-object APO Radial Velocity Exoplanet Large-area Survey (MARVELS) will monitor radial velocities of more than 8000 FGK stars with the sensitivity and cadence (10-40 ms(-1), similar to 24 visits per star) needed to detect giant planets with periods up to two years, providing an unprecedented data set for understanding the formation and dynamical evolution of giant planet systems. As of 2011 January, SDSS-III has obtained spectra of more than 240,000 galaxies, 29,000 z >= 2.2 quasars, and 140,000 stars, including 74,000 velocity measurements of 2580 stars for MARVELS.