Collaborative Research: The Carnegie Supernova Project - Pushing the Precision of Type Ia Supernovae as Cosmological Standard Candles

合作研究：卡内基超新星项目 - 提高 Ia 型超新星作为宇宙学标准烛光的精度

• 批准号: 1613455
• 负责人: Nicholas Suntzeff
• 金额: $ 32.5万
• 依托单位: Texas A&M University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1613455&HistoricalAwards=false
• 关键词: Collaborative; Research; Carnegie; Supernova; Project

This award funds research on an extensive dataset that will provide firm tests of the types of stars that end their life as Type Ia supernovae. The researchers will recalibrate data to higher precision and gain a better understanding of systematic errors and uncertainties. Results from this work will help provide tests of general relativity and improve our understanding of dark energy. Graduate students and postdoctoral researchers will be trained and mentored in research. Public outreach programs incorporating research results will be carried out at the home institutions of the PIs. The final reduced data will be made available to the astronomical community. This project will be accomplished by completing data reduction of optical and near-infrared wavelength images to produce final light curves of supernova explosions. They will also complete data reduction of near-infrared spectra of supernova explosions with an emphasis on improved removal of telluric absorption. They will produce new spectral templates for the community, analyze host galaxy properties, and produce Hubble diagrams. Finally, they will compare theory with observation and look for evidence of interaction with non-degenerate companions or circumstellar material. They will also probe the explosion physics as a function of luminosity and light curve decline rate. The dataset will also be used to improve the precision of using supernova Type Ia data as distance indicators for constraining the nature of dark energy.

该奖项资助对广泛数据集的研究，该数据集将提供对以Ia型超新星结束生命的恒星类型的可靠测试。 研究人员将重新校准数据以提高精度，并更好地了解系统误差和不确定性。 这项工作的结果将有助于检验广义相对论，并提高我们对暗能量的理解。 研究生和博士后研究人员将接受研究方面的培训和指导。将在公共研究所的所在机构开展纳入研究成果的公共外联方案。最后的压缩数据将提供给天文学界。该项目将通过完成光学和近红外波长图像的数据简化来完成，以产生超新星爆炸的最终光变曲线。他们还将完成超新星爆炸近红外光谱的数据简化，重点是改进大地吸收的去除。他们将为社区制作新的光谱模板，分析宿主星系的特性，并制作哈勃图。最后，他们将比较理论与观测，并寻找与非简并同伴或星周物质相互作用的证据。他们还将探索爆炸物理学作为光度和光变曲线下降率的函数。该数据集还将用于提高使用Ia型超新星数据作为约束暗能量性质的距离指标的精度。