CAREER: Understanding Novae as Shock-Powered Explosions

职业生涯：将新星理解为冲击动力爆炸

• 批准号: 1751874
• 负责人: Laura Chomiuk
• 金额: $ 73.04万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-04-01 至 2023-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1751874&HistoricalAwards=false
• 关键词: CAREER; Understanding; Novae; Shock; Powered

Novae explosions are responsible for the sudden appearance and gradual fading of light from a previously unknown star. They are known to be produced by binary systems (two stars orbiting each other) in which one of the stars is a "white dwarf". These stars are extremely dense, with a mass similar to the Sun's compressed into an object the size of the Earth. When material is stripped from the companion star and transferred to the surface of the white dwarf, a powerful explosion can occur. This team will use a modern survey to find novae and to follow up with detailed measurements using radio, optical/IR, and space based telescopes. This will result in a deeper understanding of novae and the processes that cause them. An educational program will be developed for rural 5-19 year olds in astronomy and physical sciences working with the Michigan 4H. The MSU Observatory will host an Astronomy Club with monthly meetings and sponsor members to develop independent projects for the County Fair. This program will review the present data and obtain a complete and unbiased sample of nova using a modern sky survey. They will also monitor this sample with gamma-ray through radio observations. High-resolution radio measurements will trace the evolution of the ejecta, leading to further insight about the conditions and phenomena that produce novae. This research will 1) Establish the first comprehensive and well-defined sample of Galactic novae, 2) Determine which novae are shock-powered by observing them with the gamma-ray telescope Fermi/LAT and HWAC, 3) Image novae ejecta with high resolution capable radio arrays to map distribution of thermal ejecta and pinpoint the location of synchrotron-emitting shocks in order to determine if nova morphology is set by a universal mechanism or if variations in ejecta geometry are linked to variations in shock powering shaping.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.

新星爆炸是造成一颗以前不为人知的星星突然出现并逐渐消失的原因。已知它们是由双星系统（两颗恒星相互环绕）产生的，其中一颗恒星是“白色矮星”。这些恒星密度极高，质量与太阳相似，被压缩成地球大小的物体。 当物质从伴星星星剥离并转移到白色矮星的表面时，就会发生强大的爆炸。 该团队将使用现代调查来寻找新星，并使用无线电，光学/红外和太空望远镜进行详细的测量。 这将导致对新星及其形成过程的更深入理解。将与密歇根州4 H合作，为农村5-19岁的奥尔兹制定天文学和物理科学教育方案。密歇根州立大学天文台将主办一个天文俱乐部，每月举行会议，并赞助成员为县博览会开发独立项目。该计划将审查目前的数据，并使用现代天空调查获得一个完整和公正的新星样本。 他们还将通过无线电观测用伽马射线监测这个样本。 高分辨率的无线电测量将追踪喷出物的演变，从而进一步了解产生新星的条件和现象。这项研究将1）建立第一个全面和明确的银河系新星样本，2）通过使用费米/LAT和HWAC伽马射线望远镜观察它们来确定哪些新星是冲击动力的，3）用高分辨率的无线电阵列对新星喷出物进行成像，以绘制热喷出物的分布图，并确定同步加速器的位置。发射冲击波，以确定新星形态是否是由一个通用的机制决定的，或者喷出物几何形状的变化是否与冲击动力成形的变化有关。该奖项反映了NSF的法定使命，并通过评估被认为值得支持使用基金会的知识价值和更广泛的影响审查标准。

项目成果

A Search For Pulsations in the Optical Light Curve of the Nova ASASSN-17hx

寻找 Nova ASASSN-17hx 光学光曲线中的脉动

• DOI: 10.3847/1538-4357/aae925
• 发表时间: 2018
• 期刊: The Astrophysical Journal
• 作者: Rosenthal, Lee J.;Shen, Ken;Hallinan, Gregg;Singh, Navtej;Chomiuk, Laura;Margutti, Raffaella;Metzger, Brian
• 通讯作者: Metzger, Brian

Thirty Years of Radio Observations of Type Ia SN 1972E and SN 1895B: Constraints on Circumstellar Shells

• DOI: 10.3847/1538-4357/ab6b2a
• 发表时间: 2020-01
• 期刊: The Astrophysical Journal
• 作者: Yvette Cendes;M. Drout;L. Chomiuk;S. Sarbadhicary

X-ray evolution of the nova V959 Mon suggests a delayed ejection and a non-radiative shock

新星 V959 Mon 的 X 射线演化表明延迟喷射和非辐射冲击

• DOI: 10.1093/mnras/staa3367
• 发表时间: 2020
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Nelson, Thomas;Mukai, Koji;Chomiuk, Laura;Sokoloski, Jennifer L;Linford, Justin D;Finzell, Thomas;Mioduszewski, Amy J;Rupen, Michael P;Weston, Jennifer;Lopes de Oliveira, Raimundo
• 通讯作者: Lopes de Oliveira, Raimundo

New Insights into Classical Novae

• DOI: 10.1146/annurev-astro-112420-114502
• 发表时间: 2020-11
• 期刊: Annual Review of Astronomy and Astrophysics
• 影响因子: 33.3
• 作者: L. Chomiuk;B. Metzger;K. Shen

1RXH J082623.6–505741: A New Long-period Cataclysmic Variable with an Evolved Donor and a Low Mass-transfer Rate

• DOI: 10.3847/1538-4357/ac7b25
• 发表时间: 2022-06
• 期刊: The Astrophysical Journal
• 作者: K. Sokolovsky;J. Strader;S. Swihart;E. Aydi;A. Bahramian;L. Chomiuk;C. Heinke;A. Hughes;Kwan-Lok Li;R. L. de Oliveira;J. Miller-Jones;K. Mukai;D. Sand;L. Shishkovsky;E. Tremou;K. Voggel