首页|Cosmology-Independent Photon Mass Limits from Localized Fast Radio Bursts by Using Artificial Neural Networks

Cosmology-Independent Photon Mass Limits from Localized Fast Radio Bursts by Using Artificial Neural Networks

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A hypothetical photon mass mγcan produce a frequency-dependent vacuum dispersion of light,which leads to an additional time delay between photons with different frequencies when they propagate through a fixed distance.The dispersion measure and redshift measurements of fast radio bursts(FRBs)have been widely used to constrain the rest mass of the photon.However,all current studies analyzed the effect of the frequency-dependent dispersion for massive photons in the standard ACDM cosmological context.In order to alleviate the circularity problem induced by the presumption of a specific cosmological model based on the fundamental postulate of the masslessness of photons,here we employ a new model-independent smoothing technique,artificial neural network(ANN),to reconstruct the Hubble parameter H(z)function from 34 cosmic-chronometer measurements.By combining observations of 32 well-localized FRBs and the H(z)function reconstructed by ANN,we obtain an upper limit of mγ≤ 3.5 × 10-51 kg,or equivalently mγ≤ 2.0 × 10-15 eV/c2(mγ ≤ 6.5 × 10-51 kg,or equivalently mγ ≤ 3.6 × 10-15 eV/c2)at the 1σ(2σ)confidence level.This is the first cosmology-independent photon mass limit derived from extragalactic sources.

冉景遇、王宝、魏俊杰

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Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210023,China

School of Astronomy and Space Sciences,University of Science and Technology of China,Hefei 230026,China

National SKA Program of China国家自然科学基金国家自然科学基金国家自然科学基金中国科学院前沿科学重点研究计划International Partnership Program of Chinese Academy of Sciences for Grand ChallengesCAS Project for Young Scientists in Basic ResearchCAS Organizational Scientific Research Platform for National Major Scientific and Technological Infrastructure:Cosmic Transi江苏省自然科学基金

2022SKA0130100123730531232100312041306ZDBS-LY-7014114332KYSB20210018YSBR-063BK20221562

2024

10.1088/0256-307X/41/5/059501

中国物理快报(英文版)
中国科学院物理研究所,中国物理学会

中国物理快报(英文版)

CSTPCDEI
影响因子：0.515
ISSN：0256-307X
年,卷(期)：2024.41(5)
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