COLLABORATIVE RESEARCH: The Hobby-Eberly Telescope Dark Energy Experiment

合作研究：霍比-埃伯利望远镜暗能量实验

• 批准号: 0926641
• 负责人: Donald Schneider
• 金额: $ 50.1万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0926641&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Hobby; Eberly; Telescope

AST-0926815/0926641/0928636Gebhardt/Schneider/DePoyThe Hobby-Eberly Telescope Dark Energy ExperimentThe solution to the problem of dark energy will require a fundamental shift in our understanding of the Universe, and acceptance of any model will require significant corroboration by observations. The Hobby-Eberly Telescope (HET) Dark Energy Experiment, HETDEX, offers a technically clean and observationally robust approach to measuring the effects of dark energy. HETDEX includes an upgrade of the HET for a wider field of view, deployment of the Visible Integral-field Replicable Unit Spectrograph (VIRUS), and completion of a wide field survey which will use 1400 hours of observation to obtain nearly a million redshifts of Lyman-alpha emitting galaxies. Significant parts of the project are already underway with support from a variety of sources, including substantial private donations.The survey will determine the local Hubble expansion at redshift 2.4 and measure the angular diameter distance out to that redshift, both to an accuracy of 0.8%, and determine the growth of structure to 2%. Nearly all other dark energy surveys target lower redshifts, while HETDEX was designed to provide high-redshift information on the evolution of dark energy, as well as being sufficiently powerful to measure dark energy effects even at late times. HETDEX further will measure the curvature of the Universe to about 0.1%, an order of magnitude better than current projects, and a strong complement to other current and planned studies. Although HETDEX is optimized for measures of the expansion history, there is significant ancillary science from the survey, such as a collection of spectra of a quarter of a million stars and 1.4 million other galaxies. Given its capabilities, VIRUS will remain a, if not the, primary instrument for HET for many years.The significant insights on dark energy, the large database with substantial ancillary science, and the unique and powerful integral field spectrograph on the HET will have a broad impact throughout the astronomical community. The attraction of the dark energy enigma enables HETDEX to include significant public outreach involving the McDonald Observatory Visitors Center and Stardate radio, including an interactive display for visitors and the involvement of K-12 teachers, as well as a popular webpage at http://www.hetdex.org.

AST-0926815/0926641/0928636GEBHARDT/SCHNEIDER/DEPOYTHE THE THE THE HOBBY-EXBY-EXBLY望远镜暗能量实验解决方案解决黑暗能量问题的解决方案将需要对我们对宇宙的理解进行根本性的转变，并且对任何模型的接受都需要进行观察的重大沟通。 HETDEX HETDEX的Hobby-Eberly望远镜（HET）暗能量实验提供了一种技术清洁且在观察方面可靠的方法来测量深色能量的影响。 HETDEX包括升级HET，以供更广阔的视野，可见的积分磁场可复制单位光谱仪（病毒）的部署以及完成宽场调查，该调查将使用1400小时的观察来获得近一百万个Lyman-Alpha发射星系的近一百万个红移。 该项目的重要部分已经在各种来源的支持下进行，包括大量私人捐款。调查将确定Redshift 2.4处的当地哈勃扩展，并测量到该红移的角直径距离，均为0.8％，并确定结构的增长率为2％。 几乎所有其他暗能量调查的目标是较低的红移，而Hetdex旨在提供有关黑暗能量演变的高红移信息，并且足够强大，即使在后期，也可以测量暗能量的影响。 HETDEX将进一步衡量宇宙的曲率达到约0.1％，比当前项目的数量级好，并且对其他当前和计划的研究有很强的补充。 尽管HETDEX已针对扩展历史的衡量标准进行了优化，但调查中有重要的辅助科学，例如，一百万颗恒星和140万个星系的光谱集合。 鉴于其能力，多年来，病毒将仍然是HET的主要工具。关于黑暗能源的重要见解，具有实质辅助科学的大型数据库以及HET上独特而强大的积分田间光谱仪在整个天文学群落中都会产生广泛的影响。 黑暗能源谜团的吸引力使HETDEX能够包括涉及麦当劳天文台游客中心和星脉广播的重要公开推广，包括访问者的互动式展示以及K-12教师的参与以及http://wwwwwwwwwww.hetdex.org的流行网页。