Testing General Relativity with Gravitational Wave Observations

用引力波观测检验广义相对论

• 批准号: 2012083
• 负责人: Bangalore Sathyaprakash
• 金额: $ 27万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2012083&HistoricalAwards=false
• 关键词: Testing; General; Relativity; Gravitational; Wave

This award supports research in relativity and relativistic astrophysics, and it addresses the priority areas of NSF's "Windows on the Universe" Big Idea. The past two decades have witnessed compounding problems in observational cosmology that simply don’t go away: the accelerated expansion of the Universe, tension between the local and early Universe epoch measurements of the Hubble constant, and non-detection of dark matter are prime examples of crises in physics. A multitude of effort is being made to better understand these problems as one does not know where the problem might be. Modified gravity theories are seen as one possible solution. Likewise, conceptual problems in general relativity need to be examined observationally from a variety of different approaches to be successful. This award will test general relativity in ways complementary to other tests (e.g. the black hole no-hair test) and probe the strong-field regime of gravity, making the full use of the signal. These tests will either detect violation of general relativity or constrain certain modified theories of gravity that have been invoked to explain the aforementioned cosmological problems.General Relativity has been a tremendously successful theory in explaining current astronomical observations and laboratory experiments. Nevertheless, there is a general consensus that the theory is at best incomplete, representing an approximation to a more complete theory that cures some or all of its problems. The work supported by this grant is takes a two-pronged approach to explore general relativistic violations: 1. Measure the multipolar structure of the observed radiation to test for self-consistency of general relativity. 2. An incoherent, time-frequency test that checks for consistency of the observed signal-power in different multipoles with the predictions of general relativity. The tests will improve upon the current approach in two significant ways. Firstly, for binaries with large mass asymmetry (m1/m22) and orbital inclinations more than 30 degrees one can expect appreciable signal power in higher order multipoles. Secondly, by making use of the full inspiral-merger-ringdown signal in the analysis increases the signal-to-noise ratio in higher modes.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.

该奖项支持相对论和相对论天体物理学的研究，并阐述了美国国家科学基金会“宇宙之窗”大构想的优先领域。在过去的二十年里，观测宇宙学中的复杂问题一直没有消失：宇宙的加速膨胀，哈勃常数的局部和早期宇宙纪元测量之间的紧张，以及没有检测到暗物质，这些都是物理学危机的主要例子。为了更好地了解这些问题，人们正在进行大量的努力，因为人们不知道问题可能出在哪里。修改后的引力理论被视为一种可能的解决方案。同样，广义相对论中的概念问题需要从各种不同的方法进行观测研究才能取得成功。该奖项将以补充其他测试(例如黑洞无毛测试)的方式测试广义相对论，并充分利用信号探索引力的强场区域。这些测试将发现对广义相对论的违反，或者限制某些被引用来解释上述宇宙学问题的修改后的引力理论。广义相对论在解释当前的天文观测和实验室实验方面一直是一个非常成功的理论。然而，有一个普遍的共识是，这个理论充其量是不完整的，代表着一个更完整的理论的近似值，可以治愈它的部分或全部问题。这项由这笔赠款支持的工作是采取双管齐下的方法来探索广义相对论的违反：1.测量观测到的辐射的多极结构，以测试广义相对论的自洽。2.一种不连贯的时频测试，用于检查不同多极中观察到的信号功率与广义相对论预测的一致性。这些测试将在两个重要方面对目前的方法进行改进。首先，对于具有大质量不对称性(M1/M22)和轨道倾角大于30度的双星，人们可以在更高阶的多极子中看到明显的信号功率。其次，通过在分析中使用完整的激励-合并-振铃信号来提高更高模式的信噪比。这一奖项反映了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。

项目成果

Science with the Einstein Telescope: a comparison of different designs

• DOI: 10.1088/1475-7516/2023/07/068
• 发表时间: 2023-03
• 期刊: Journal of Cosmology and Astroparticle Physics
• 影响因子: 6.4
• 作者: M. Branchesi;M. Maggiore;D. Alonso;C. Badger;B. Banerjee;F. Beirnaert;S. Bhagwat;G. Boileau;S. Borhanian;Daniel D. Brown;M. Chan;G. Cusin;S. Danilishin;J. Degallaix;V. D. Luca;A. Dhani;T. Dietrich;U. Dupletsa;S. Foffa;G. Franciolini;A. Freise;G. Gemme;B. Goncharov;A. Ghosh;F. Gulminelli;I. Gupta;Pawan Kumar Gupta;J. Harms;N. Hazra;S. Hild;T. Hinderer;I. Heng;F. Iacovelli;J. Janquart;K. Janssens;A. Jenkins;C. Kalaghatgi;X. Koroveshi;T. Li;Yufeng Li;Eleonora Loffredo;E. Maggio;M. Mancarella;M. Mapelli;K. Martinovic;A. Maselli;P. Meyers;Andrew L. Miller;C. Mondal;Niccolò Muttoni;H. Narola;M. Oertel;G. Oganesyan;Costantino Pacilio;C. Palomba;P. Pani;A. Pasqualetti;A. Perego;C. Périgois;M. Pieroni;O. Piccinni;A. Puecher;P. Puppo;A. Ricciardone;A. Riotto;S. Ronchini;M. Sakellariadou;A. Samajdar;Filippo Santoliquido;B. Sathyaprakash;J. Steinlechner;S. Steinlechner;A. Utina;C. Broeck;Teng Zhang

Systematic errors due to quasiuniversal relations in binary neutron stars and their correction for unbiased model selection

双中子星准普遍关系引起的系统误差及其对无偏模型选择的校正

• DOI: 10.1103/physrevd.106.123001
• 发表时间: 2022
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Kashyap, Rahul;Dhani, Arnab;Sathyaprakash, Bangalore
• 通讯作者: Sathyaprakash, Bangalore

Toward inference of overlapping gravitational-wave signals

推断重叠引力波信号

• DOI: 10.1103/physrevd.105.104016
• 发表时间: 2022
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Pizzati, Elia;Sachdev, Surabhi;Gupta, Anuradha;Sathyaprakash, B. S.
• 通讯作者: Sathyaprakash, B. S.

Constraining properties of asymmetric dark matter candidates from gravitational-wave observations

• DOI: 10.1103/physrevd.107.083037
• 发表时间: 2022-10
• 期刊: Physical Review D
• 影响因子: 5
• 作者: Divya Singh;Anuradha Gupta;E. Berti;S. Reddy;B. Sathyaprakash

Science-driven Tunable Design of Cosmic Explorer Detectors

科学驱动的宇宙探测器探测器可调谐设计

• DOI: 10.3847/1538-4357/ac5f04
• 发表时间: 2022
• 期刊: The Astrophysical Journal
• 作者: Srivastava, Varun;Davis, Derek;Kuns, Kevin;Landry, Philippe;Ballmer, Stefan;Evans, Matthew;Hall, Evan D.;Read, Jocelyn;Sathyaprakash, B. S.
• 通讯作者: Sathyaprakash, B. S.