New Frontiers in Nuclear Astrophysics

核天体物理学新领域

• 批准号: 2310018
• 负责人: John Beacom
• 金额: $ 60万
• 依托单位: Ohio State University
• 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: 2023-08-01 至 2026-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2310018&HistoricalAwards=false
• 关键词: New; Frontiers; Nuclear; Astrophysics

Humanity has long been fascinated by the majesty of the night sky. Now, with powerful scientific tools, scientists can better observe stars, galaxies, and the universe itself. Researchers can also better understand the mechanisms behind this majesty. Nuclear physics processes are especially important. Stars are powered by fusion reactions, supernova explosions produce and disperse chemical elements, and the remnants of these explosions accelerate high-energy cosmic rays. A better understanding of these nuclear processes would help us understand the origin, nature, and fate of the universe. A way forward is possible using neutrinos, tiny particles with zero charge, almost no mass, and only weak interactions. Neutrinos are abundantly produced in many astrophysical objects. Detecting neutrinos is very difficult, but doing so can reveal physical conditions deep within these sources, beyond the reach of observations with light. The PI leads a broad program of theoretical work in neutrino astrophysics designed to lead to breakthroughs in understanding astrophysical objects and neutrino properties. Junior scientists will be trained on cutting-edge research as well as career skills. The PI and junior scientists work to share results with the public and to broaden participation by under-represented groups, including the deaf and hard of hearing. The PI’s ambitious research program has three thrusts: solar neutrinos, supernova neutrinos, and high-energy neutrinos. The central tenet of this project is that a broad, integrated program in theoretical neutrino astronomy will powerfully address core questions in nuclear physics while significantly advancing the science of multi-messenger astronomy and beyond the standard model physics. For solar neutrinos, long-term outcomes could include significantly reduced detector backgrounds and thus improvements in the precision of signals from existing detectors, along with facilitating a high-statistics solar-neutrino measurement in the DUNE detector. For supernova neutrinos, these could include better observing a Milky Way supernova and facilitating discovery of the Diffuse Supernova Neutrino Background (DSNB). For high-energy neutrinos, these could include improved probes of atmospheric neutrinos and facilitating discoveries of astrophysical neutrino sources. Individually, the main thrusts of this project could each have a very high impact. Together, they could greatly advance neutrino astronomy, nuclear astrophysics, and more.This project advances the objectives of "Windows on the Universe: the Era of Multi-Messenger Astrophysics", one of the 10 Big Ideas for Future NSF Investments.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.

长期以来，人类一直被夜空的壮丽所吸引。现在，有了强大的科学工具，科学家可以更好地观察恒星、星系和宇宙本身。研究人员还可以更好地理解这种威严背后的机制。核物理过程尤为重要。恒星由聚变反应提供动力，超新星爆炸产生并分散化学元素，这些爆炸的残余物加速高能宇宙射线。更好地了解这些核过程将有助于我们了解宇宙的起源、性质和命运。使用中微子是一种可能的方法，中微子是一种微小的粒子，电荷为零，几乎没有质量，只有弱相互作用。中微子在许多天体中大量产生。探测中微子非常困难，但这样做可以揭示这些源内部深处的物理条件，而不是用光观测到的。PI领导着一项广泛的中微子天体物理理论工作计划，旨在导致在理解天体物理对象和中微子属性方面的突破。初级科学家将接受尖端研究和职业技能方面的培训。PI和初级科学家致力于与公众分享结果，并扩大代表不足的群体的参与，包括聋人和重听者。PI雄心勃勃的研究计划有三个推进器：太阳中微子、超新星中微子和高能中微子。这个项目的中心原则是，一个广泛的、综合的理论中微子天文学计划将有力地解决核物理中的核心问题，同时显著推进多信使天文学的科学，并超越标准模型物理学。对于太阳中微子，长期成果可能包括大大减少探测器背景，从而提高现有探测器信号的精度，同时促进在沙丘探测器上进行高统计的太阳中微子测量。对于超新星中微子，这些可能包括更好地观测银河系超新星，以及促进扩散超新星中微子背景(DSNB)的发现。对于高能中微子，这可能包括改进的大气中微子探测器，以及促进天体物理中微子源的发现。就个人而言，这个项目的每个主要推动力都可能产生非常高的影响。这个项目推进了“宇宙之窗：多信使天体物理时代”的目标，这是未来NSF投资的十大想法之一。这个奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。