CAREER: Nucleosynthesis in Degenerate Stars

职业：简并恒星中的核合成

基本信息

批准号：
2233781
负责人：
Evan Kirby
金额：
$ 75.85万
依托单位：
University of Notre Dame
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2022
资助国家：
美国
起止时间：
2022-07-15 至 2024-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2233781&HistoricalAwards=false
关键词：
CAREER Nucleosynthesis Degenerate Stars

项目摘要

Dense stars cause some of the most powerful explosions in the Universe. For example, white dwarf stars explode at the end of their lives as Supernovae, when they ignite a runaway nuclear reaction. These explosions can be seen at great distances and are important for measuring the expansion of the Universe. These hot explosions expel ionized iron, nickel and other metals into space, leaving behind dense neutron stars. Neutron stars can also explode by merger of two neutron stars. This explosion is very different, and creates very heavy elements, like gold and barium. Neutron star mergers have recently been discovered with the NSF-funded Laser Interferometer Gravitational Wave Observatory (LIGO). The investigator will estimate the rate of neutron star mergers by sensitive observations of the amounts of barium, iron and other metals in nearby galaxies. The investigator's goal is to understand which types of explosions have created the elements found on Earth and throughout the Universe.High school students will participate in this research during the summer. The investigator will encourage the inclusion of new groups of students by offering stipends. The investigator also plans to implement tiers of mentoring. Faculty will mentor postdocs, who will mentor graduate students. The graduate students will mentor undergraduate students, who will mentor high school students. This strategy has been shown to encourage younger students to pursue research careers.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.

稠密的恒星会引起宇宙中一些最强大的爆炸。例如，白矮星在生命结束时会爆炸，成为超新星，引发失控的核反应。这些爆炸可以在很远的距离看到，对于测量宇宙的膨胀很重要。这些热爆炸将电离铁、镍和其他金属喷射到太空中，留下密集的中子星。中子星也可以通过两颗中子星的合并而爆炸。这次爆炸非常不同，会产生非常重的元素，例如金和钡。最近，美国国家科学基金会 (NSF) 资助的激光干涉仪引力波天文台 (LIGO) 发现了中子星合并现象。研究人员将通过对附近星系中钡、铁和其他金属含量的敏感观测来估计中子星合并的速度。调查员的目标是了解哪些类型的爆炸产生了地球和整个宇宙中发现的元素。高中生将在夏季参加这项研究。调查员将通过提供津贴来鼓励新学生群体的加入。研究人员还计划实施分级指导。教师将指导博士后，博士后将指导研究生。研究生将指导本科生，本科生将指导高中生。这一策略已被证明可以鼓励年轻学生从事研究事业。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力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

期刊论文数量（8）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

The Hubble Space Telescope Survey of M31 Satellite Galaxies. I. RR Lyrae–based Distances and Refined 3D Geometric Structure

哈勃太空望远镜对 M31 卫星星系的巡天。

DOI：
10.3847/1538-4357/ac91cb
发表时间：
2022
期刊：
The Astrophysical Journal
影响因子：
0
作者：
Savino, Alessandro;Weisz, Daniel R.;Skillman, Evan D.;Dolphin, Andrew;Kallivayalil, Nitya;Wetzel, Andrew;Anderson, Jay;Besla, Gurtina;Boylan-Kolchin, Michael;Bullock, James S.
通讯作者：
Bullock, James S.

HALO7D. III. Chemical Abundances of Milky Way Halo Stars from Medium-resolution Spectra

DOI：
10.3847/1538-4357/acd33d
发表时间：
2023-02
期刊：
The Astrophysical Journal
影响因子：
0
作者：
Kevin A. McKinnon;E. Cunningham;C. Rockosi;P. Guhathakurta;I. Escala;E. Kirby;A. Deason
通讯作者：
Kevin A. McKinnon;E. Cunningham;C. Rockosi;P. Guhathakurta;I. Escala;E. Kirby;A. Deason

A Noninteracting Galactic Black Hole Candidate in a Binary System with a Main-sequence Star

具有主序星的双星系统中的非相互作用星系黑洞候选者

DOI：
10.3847/1538-3881/accf21
发表时间：
2023
期刊：
The Astronomical Journal
影响因子：
0
作者：
Chakrabarti, Sukanya;Simon, Joshua D.;Craig, Peter A.;Reggiani, Henrique;Brandt, Timothy D.;Guhathakurta, Puragra;Dalba, Paul A.;Kirby, Evan N.;Chang, Philip;Hey, Daniel R.
通讯作者：
Hey, Daniel R.

On the Metallicities and Kinematics of the Circumgalactic Media of Damped Lyα Systems at z ∼ 2.5*

关于 z ≤ 2.5* 阻尼 Lyα 系统的环绕银河系介质的金属量和运动学

DOI：
10.3847/1538-4357/acd34a
发表时间：
2023
期刊：
The Astrophysical Journal
影响因子：
0
作者：
Urbano Stawinski, Stephanie M.;Rubin, Kate H. R.;Prochaska, J. Xavier;Hennawi, Joseph F.;Tejos, Nicolas;Fumagalli, Michele;Rafelski, Marc;Kirby, Evan N.;Lusso, Elisabeta;Hafen, Zachary
通讯作者：
Hafen, Zachary

Structural Parameters and Possible Association of the Ultra-faint Dwarfs Pegasus III and Pisces II from Deep Hubble Space Telescope Photometry

哈勃深空望远镜光度测量的超微弱矮星飞马座 III 和双鱼座 II 的结构参数和可能的关联

DOI：
10.3847/1538-4357/ac7226
发表时间：
2022
期刊：
The Astrophysical Journal
影响因子：
0
作者：
Richstein, Hannah;Patel, Ekta;Kallivayalil, Nitya;Simon, Joshua D.;Zivick, Paul;Tollerud, Erik;Fritz, Tobias;Warfield, Jack T.;Besla, Gurtina;van der Marel, Roeland P.
通讯作者：
van der Marel, Roeland P.