Ultracompact binaries: Gravitational wave sources and supernova Ia progenitors

超紧凑双星：引力波源和超新星 Ia 前身

• 批准号: 2107982
• 负责人: Thomas Maccarone
• 金额: $ 30.78万
• 依托单位: Texas Tech University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2107982&HistoricalAwards=false
• 关键词: Ultracompact; binaries; Gravitational; wave; sources

Studies of Ultra-compact binaries (UCBs), consisting of an extremely close pair of white dwarf (WD), neutron star (NS), and/or helium stars, are key to a better understanding of late-stage binary star evolution as well as alternate pathways to Type Ia supernovae (SN), the latter representing our best "standard candle" for determining the extra-galactic distance scale and the ultimate fate of the universe (e.g., cosmic acceleration). Galactic UCBs will also be routinely detected by the next generation of gravity wave telescopes like ESA/NASA's Laser Interferometer Space Antenna (LISA). A research team at Texas Tech University will analyze a fast cadence survey of the Galactic Plane in both hemispheres to identify a uniform sample of several-hundred new UCBs. The research will support a Ph.D. candidate. The principal investigator will also establish a program to bring research experience to underserved and rural elementary, middle, and high-school students plus teacher-training.UCBs can be detected through their light-curves, which show variations on timescales as short as 30-min due to eclipses or tidal deformation of the close components. The NSF-funded Zwicky Transient Facility (ZTF) and the BlackGEM array are the next generation optical time-domain surveys covering both hemispheres. This research will combine data from both with other large-scale surveys, such as eROSITA, PanSTARRS, Gaia, and SDSS-V to compile a uniform sample of Galactic plane UCBs. This project expects to find and characterize a few hundred new UCBs and anticipates the determination of accurate system parameter for a few tens of systems. The large sample will be used to challenge common envelope and binary evolution theories (e.g., predicted vs. observed orbital period and component mass distributions) and calculate empirical SN Ia rates for various pathways. They expect to triple the number of known LISA-detectable sources and increase the number of known SN Ia progenitors by at least an order of magnitude. UCBs are expected to dominate the sources detectable by LISA and will thus create a stochastic foreground gravitational wave signal. Characterizing the Galactic UCB population will be important in the near term for finding optimal design and data analysis methods for LISA to confidently detect other gravitational wave sources (e.g., binary blackhole or white dwarf mergers) hidden in this “noise”. This project thus advances the goals of the NSF Windows on the Universe Big Idea.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.

超紧凑型双星（ucb）由一对非常接近的白矮星（WD）、中子星（NS）和/或氦星组成，对它们的研究是更好地理解晚期双星演化以及通往Ia型超新星（SN）的替代途径的关键，后者代表了我们确定星系外距离尺度和宇宙最终命运（例如宇宙加速）的最佳“标准蜡烛”。银河ucb也将被下一代重力波望远镜（如ESA/NASA的激光干涉仪空间天线（LISA））常规探测到。德克萨斯理工大学的一个研究小组将对两个半球的银河面进行快节奏调查，以确定数百个新ucb的统一样本。这项研究将资助一位博士候选人。首席研究员还将建立一个项目，为服务不足的农村小学、初中和高中学生以及教师培训提供研究经验。ucb可以通过它们的光曲线来检测，这些光曲线显示出由于日食或近距离组件的潮汐变形而在短至30分钟的时间尺度上的变化。美国国家科学基金会资助的兹威基瞬态设施（ZTF）和BlackGEM阵列是覆盖两个半球的下一代光学时域巡天。这项研究将把这两项数据与其他大规模调查（如eROSITA、PanSTARRS、Gaia和SDSS-V）的数据结合起来，编制一个统一的银河面ucb样本。该项目期望找到几百个新的ucb，并确定几十个系统的准确系统参数。大样本将用于挑战常见的包络和二元演化理论（例如，预测与观测的轨道周期和成分质量分布），并计算各种途径的经验SN Ia率。他们期望将已知的lisa可探测源的数量增加三倍，并将已知的SN Ia祖先的数量增加至少一个数量级。ucb有望在LISA探测到的信号源中占主导地位，因此将产生随机前景引力波信号。在短期内，描述银河系UCB群的特征对于寻找最佳设计和数据分析方法非常重要，LISA可以自信地探测隐藏在这种“噪音”中的其他引力波源（例如，双黑洞或白矮星合并）。因此，这个项目推进了NSF宇宙大构想窗口的目标。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

X-Ray Observation of the Roche-lobe-filling White Dwarf plus Hot Subdwarf System ZTF J213056.71+442046.5

• DOI: 10.3847/1538-4357/ac686e
• 发表时间: 2022-04
• 期刊: The Astrophysical Journal
• 作者: S. Mereghetti;N. La Palombara;T. Kupfer;T. Marsh;C. Copperwheat;K. Deshmukh;P. Esposito;T. Maccarone;F. Pintore;M. Rigoselli;L. Rivera Sandoval;A. Tiengo

The OmegaWhite survey for short-period variable stars – VII. High amplitude short-period blue variables

OmegaWhite 对短周期变星的巡天 – VII。

• DOI: 10.1093/mnras/stac1000
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Ramsay, Gavin;Woudt, Patrick A.;Kupfer, Thomas;van Roestel, Jan;Paterson, Kerry;Warner, Brian;Buckley, David A. H.;Groot, Paul J.;Heber, Ulrich;Irrgang, Andreas
• 通讯作者: Irrgang, Andreas

Discovery of a Double-detonation Thermonuclear Supernova Progenitor

• DOI: 10.3847/2041-8213/ac48f1
• 发表时间: 2021-10
• 期刊: The Astrophysical Journal Letters
• 作者: T. Kupfer;E. Bauer;J. van Roestel;E. Bellm;L. Bildsten;J. Fuller;T. Prince;U. Heber;S. Geier-S.-G

The ELM Survey South. II. Two Dozen New Low-mass White Dwarf Binaries

• DOI: 10.3847/1538-4357/acd187
• 发表时间: 2023-05
• 期刊: The Astrophysical Journal
• 作者: A. Kosakowski;Warren R. Brown;M. Kilic;T. Kupfer;Antoine B'edard;A. Gianninas;M. Agueros;Manuel Barrientos

Limiting the accretion disc light in two mass transferring hot subdwarf binaries

限制两个质量传递热亚矮星双星中的吸积盘光

• DOI: 10.1093/mnras/stac3492
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Deshmukh, Kunal;Kupfer, Thomas;Hakala, Pasi;Bauer, Evan B.;Berdyugin, Andrei;Bildsten, Lars;Marsh, Thomas R.;Mereghetti, Sandro;Piirola, Vilppu
• 通讯作者: Piirola, Vilppu