Collaborative Research: White Dwarfs in Binaries Across the H-R Diagram with the APOGEE-GALEX-Gaia Catalog

合作研究：使用 APOGEE-GALEX-Gaia 目录在 H-R 图上的双星中的白矮星

• 批准号: 2307864
• 负责人: Steven Majewski
• 金额: $ 19.32万
• 依托单位: University of Virginia Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-09-01 至 2026-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2307864&HistoricalAwards=false
• 关键词: Collaborative; Research; White; Dwarfs; Binaries

More than 95 percent of stars will eventually end up as white dwarfs - the remains of stars that have used up their nuclear fuel and collapsed to a size equivalent to Earth but with a mass comparable to the Sun. Many of these white dwarfs are locked in a cosmic dance with stellar companions, where they orbit around each other and exchange mass. Such close white dwarf binary systems offer an excellent opportunity to study the late stages of stellar evolution. They can also be used as tracers of the dynamics of the Milky Way galaxy, and they are potential sources of gravitational waves. The goal of this project is to collect data on these systems at a wide range of wavelengths to characterize them and investigate fundamental properties, like what they are made of and how much mass they are sharing. This work will also provide several projects for science students at various stages, and the investigators will work with experts in accessibility to create training programs to teach astronomy to blind and visually impaired people. Most white dwarfs inhabit multiple systems, and a large fraction of those are compact enough to exchange mass, changing the structures and subsequent evolution of both stars. The physical mechanisms that mediate these mass exchanges include common envelope evolution, Roche lobe overflow, wind accretion, mass stripping, and stellar mergers. The main goal of this proposal is to further our understanding of mass transfer processes in interacting systems by assembling a unique observational sample of thousands of post mass-transfer binaries. The source sample combines the GALEX and Gaia databases with APOGEE — a high resolution (R=22,500), high signal-to-noise, multi-epoch, infrared (1.51 μm to 1.69 μm), spectroscopic survey of stars across the Milky Way — to build the most exhaustive survey of post-mass transfer binaries, containing systems with main sequence, subgiant, red giant, and red clump companions. The creation of this APOGEE-GALEX-Gaia Catalog and the proposed analysis of the resulting data set will improve our knowledge of the population of post-mass transfer binaries containing a white dwarf, and map the changes in their properties as a function of the evolution of the non-degenerate companion.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.

超过95％的恒星最终将以白矮人的形式最终形成 - 剩余的恒星用消耗其核燃料并倒塌的尺寸与地球相等，但质量与太阳相当。这些白矮人中的许多人都与恒星同伴一起锁定在宇宙舞蹈中，他们彼此绕着旋转并交换质量。如此亲密的白矮人二进制系统为研究恒星进化的后期提供了绝佳的机会。它们也可以用作银河系动力学的示踪剂，它们是引力波的潜在来源。该项目的目的是收集有关这些系统的数据，以广泛的波长来表征它们并调查基本属性，例如它们的制成以及它们共享的质量。这项工作还将在各个阶段为科学专业的学生提供几个项目，调查人员将与专家合作，以创建培训计划，以教授天文学对盲人和视力障碍的人。大多数白色矮人会影响多个系统，其中很大一部分是紧凑的，足以交换质量，改变结构并随后两颗恒星的演变。介导这些质量交换的物理机制包括共同的包膜演化，Roche Lobe溢出，风积，质量剥离和出色的合并。该提案的主要目的是通过组装数千个质量转移后二进制文件的独特观察样本来进一步了解相互作用系统中的传质过程。 The source sample combines the GALEX and Gaia databases with APOGEE — a high resolution (R=22,500), high signal-to-noise, multi-epoch, infrared (1.51 μm to 1.69 μm), spectroscopic survey of stars across the Milky Way — to build the most exhaustive survey of post-mass transfer binaries, containing systems with main The creation of this APOGEE-GALEX-Gaia目录和对所得数据集的建议分析将提高我们对包含白色矮人的质量后转移二进制文件的知识，并将其属性的变化绘制为非脱非排位伴侣的演变的变化。该奖项反映了NSF的法定任务，并通过使用基础的智力效果和宽阔的范围来评估支持NSF的法定任务，并以评估为贵族。