Advancing the Science from The Hobby-Eberly Telescope Dark Energy Experiment

霍比-埃伯利望远镜暗能量实验推动科学进步

• 批准号: 2008793
• 负责人: Karl Gebhardt
• 金额: $ 91.3万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2008793&HistoricalAwards=false
• 关键词: Advancing; Science; Hobby; Eberly; Telescope; Advancing; Science; Hobby; Eberly; Telescope

It is now well established that our universe is undergoing an accelerated expansion. The initial observations in the late 1990s for this expansion come from observations of distant Supernova and have held up to latest analysis today. It is not known what causes this acceleration, named “dark energy”. It is believed to be responsible for about 70% of the matter energy density of the universe. There are many theories for the cause of “dark energy”: perhaps new particles, vacuum energy pushing the universe outward, modifying the theory of relativity concerning the laws of gravity, or some other unknown process which will lead to a more detailed understanding of the evolution of the universe from its origin in a “Big Bang” to the present day. The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) will collect data on at least 700,000 galaxies that are 9 to 11 billion light years away allowing astronomers to measure how fast the universe was expanding at different times in its history. Changes in the expansion rate will reveal the role of “dark energy” at different epochs which will be used to validate/negate the predictions of various theories or give new clues that will lead to a final solution. The observational program for HETDEX is fully funded, and currently about 25% complete. This grant will support the compilation of a detailed catalog containing the calibrated data products that will be available to the scientific community and the public for additional astrophysical science studies. A cell phone app will be developed for a Citizen science program using the data products.This grant will amplify the science from HETDEX by combining a vetted catalog with a public database that will be employed for ancillary science by the scientific community and citizen science applications. The neural networks used for the spectral extractions for classifying the galaxies in the catalog to meet the HETDEX specifications need to be optimized. Partial support will be for an expert at the Texas Advanced Computing Center (TACC) to design the public access to the data base including web development, and data base maintenance and will interface with the postdoctoral fellow for vetting the catalog for the optimization of the visual classification into machine learning. The information from the classification campaign will be folded back into the reduction software for continued reduction optimization. This will allow the data base to be maintained and updated for subsequent data releases as more about the system is learned. This support will build a truly useful data base for the internal use of the HETDEX program, public access for additional science the scientific community as well as Citizen science projects using the cell phone application that will be developed for this program.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

现在，我们的宇宙正在进行加速的扩展。 1990年代后期的最初观察结果来自对遥远的超新星的观察，并持续了最新的分析。尚不知道是什么原因导致这种加速度，称为“暗能量”。据信它负责宇宙的物质能量密度的大约70％。有很多关于“暗能”原因的理论：也许是新的粒子，真空能量将宇宙向外推动，修改了有关重力定律的相对论，或其他一些未知的过程，这将使对宇宙在“大爆炸”中的起源的进化更详细地理解。 Hobby-eberly望远镜黑暗能源实验（HETDEX）将收集至少700,000个星系的数据，即光线为9到110亿光年，使天文学家能够衡量宇宙在其历史上的不同时间扩展的速度。扩展率的变化将揭示“暗能量”在不同时期的作用，该时期将用于验证/否定各种理论的预测或提供最终解决方案的新线索。 HETDEX的观察计划已完全基金，目前约有25％完成。该赠款将支持包含校准数据产品的详细目录的汇编，该目录将为科学界和公众提供其他天体物理学研究。将使用数据产品为公民科学计划开发手机应用程序。这笔拨款将通过将审查的目录与科学界和公民科学应用程序用于辅助科学的公共数据库相结合，从而扩大HETDEX的科学。用于对目录中的星系进行分类以满足HETDEX规范的光谱提取的神经网络需要优化。部分支持将为德克萨斯州高级计算中心（TACC）的专家设计，以设计公众对数据库的访问，包括Web开发和数据基础维护，并将与博士后研究员接触，以审查目录，以将视觉分类优化到机器学习中。分类活动中的信息将折叠回还原软件，以持续减少优化。这将允许随后的数据发布并更新数据库，因为更多地了解了系统。这种支持将建立一个真正有用的数据库，用于使用将为该计划开发的手机应用程序的HETDEX计划，公共访问科学界以及公民科学项目。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛的影响审查审查标准来通过评估来通过评估来支持的。