KMS of Xinjiang Astronomical Observatory, CAS
| Constraints on the Fractional Changes of the Fundamental Constants at a Look-back Time of 2.5 Myr | |
Su, Renzhi1 ; An, Tao2,3,4; Curran, Stephen J.5; Busch, Michael P.6; Gu, Minfeng2; Li, Di1,7,8
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| 2025-03-10 | |
| Source Publication | ASTROPHYSICAL JOURNAL LETTERS
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| ISSN | 2041-8205 |
| Volume | 981Issue:2Pages:L25 |
| Contribution Rank | 3 |
| Abstract | The quantum nature of gravity remains one of the greatest mysteries of modern physics, with many unified theories predicting variations in fundamental constants across space and time. Here we present precise measurements of these variations at galactic dynamical timescales-a critical but previously unexplored regime. Using simultaneous observations of H i and OH lines in M31, we probe potential variations of fundamental constants at a look-back time of 2.5 million yr. We obtained Delta(mu alpha(2)g(p)(0.64))/(mu alpha(2)g(p)(0.64))<3.6x10(-6) , with complementary constraints on Delta(mu alpha(2))/(mu alpha(2)) < 4.6 x 10(-3), and Delta g(p)/g(p) < 7.2 x 10(-3), where alpha is the fine structure constant, mu is the proton-electron mass ratio, and gp is the proton g-factor. These results bridge the gap between laboratory tests and cosmological observations, providing unique insights into the coupling between local dynamics and fundamental physics. Our findings challenge theories predicting significant variations over galactic timescales while demonstrating a powerful new probe of quantum gravity models. |
| DOI | 10.3847/2041-8213/adb843 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | FINE-STRUCTURE CONSTANT ; ELECTRON MASS-RATIO ; ARTIFICIAL-INTELLIGENCE ; ABSORPTION ; LIMIT ; EVOLUTION ; EMISSION ; CLOCKS |
| Funding Project | MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809[11988101] ; National Natural Science Foundation of China[2024M752979] ; China Postdoctoral Science Foundation[2022SKA0120102] ; China Postdoctoral Science Foundation[JCYJ-SHFY-2021-013] ; National SKA Program of China[AST-2202373] ; NSF Astronomy and Postdoctoral Fellowship ; Xinjiang Tianchi Talent Program[NSFC 12041301] ; FAST Special Program[12473019] ; National Science Foundation of China[CMSCSST-2021-A06] ; China Manned Space Project |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001439079200001 |
| Publisher | IOP Publishing Ltd |
| Funding Organization | MOST divided by National Natural Science Foundation of China (NSFC)https://doi.org/10.13039/501100001809 ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; National SKA Program of China ; NSF Astronomy and Postdoctoral Fellowship ; Xinjiang Tianchi Talent Program ; FAST Special Program ; National Science Foundation of China ; China Manned Space Project |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/7494 |
| Collection | 中国科学院新疆天文台 |
| Corresponding Author | Su, Renzhi |
| Affiliation | 1.Zhejiang Lab, Res Ctr Astron Comp, Hangzhou 311100, Peoples R China 2.Chinese Acad Sci, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 4.Guizhou Univ, Guizhou Radio Astron Observ, Guiyang 550000, Peoples R China 5.Victoria Univ Wellington, Sch Chem & Phys Sci, POB 600, Wellington 6140, New Zealand 6.Univ Calif San Diego, Dept Astron & Astrophys, 9500 Gilman Dr, La Jolla, CA 92093 USA 7.Tsinghua Univ, Dept Astron, Beijing 100084, Peoples R China 8.Chinese Acad Sci, Natl Astron Observ, Datun Rd A20, Beijing, Peoples R China |
| Recommended Citation GB/T 7714 | Su, Renzhi,An, Tao,Curran, Stephen J.,et al. Constraints on the Fractional Changes of the Fundamental Constants at a Look-back Time of 2.5 Myr[J]. ASTROPHYSICAL JOURNAL LETTERS,2025,981(2):L25. |
| APA | Su, Renzhi,An, Tao,Curran, Stephen J.,Busch, Michael P.,Gu, Minfeng,&Li, Di.(2025).Constraints on the Fractional Changes of the Fundamental Constants at a Look-back Time of 2.5 Myr.ASTROPHYSICAL JOURNAL LETTERS,981(2),L25. |
| MLA | Su, Renzhi,et al."Constraints on the Fractional Changes of the Fundamental Constants at a Look-back Time of 2.5 Myr".ASTROPHYSICAL JOURNAL LETTERS 981.2(2025):L25. |
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| File Name/Size | DocType | Version | Access | License | ||
| Su-2025-Constraints （345KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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