We report a constraint on the cosmological variation of the proton g-factor,g p.By comparing the measured redshifts between mboxH[131612871054103210261171106210321026817374340333324]21 cm and OH 18 cm lines observed w...We report a constraint on the cosmological variation of the proton g-factor,g p.By comparing the measured redshifts between mboxH[131612871054103210261171106210321026817374340333324]21 cm and OH 18 cm lines observed with the newly commissioned Five-hundred-meter Aperture Spherical radio Telescope(FAST)toward PKS 1413+135 at z=0.24671,we obtain Δg _(p)/g_(p)=(−4.3±2.5)×10^(−5),which is more than two orders of magnitude more sensitive than previous constraints.In addition,we obtain sensitive constraints ofΔ(μα^(2))/(μα^(2))=(2.0±1.2)×10^(−5) and Δ(μα^(2)g_(p)^(0.64))/(μα^(2)g_(p)^(0.64))=(−4.7±1.9)×10^(−6).展开更多
基金supported by the National Natural Science Foundation of China (Grant No.12588202)Renzhi Suceived the support from the National SKA Program of China (Grant No.2025SKA0130100)+5 种基金the Shanghai Super Postdoctoral Incentive Program (Grant No.2025322)the China Postdoctoral Science Foundation (Grant No.2025M783232)supported by the National Natural Science Foundation of China (Grant No.12473019)the Shanghai Pilot Program for Basic Research-Chinese Academy of Sciences,Shanghai Branch (Grant No.JCYJ-SHFY-2021-013)the National SKA Program of China (Grant No.2022SKA0120102)the China Manned Space Project (Grant No.CMSCSST-2025-A07)。
文摘We report a constraint on the cosmological variation of the proton g-factor,g p.By comparing the measured redshifts between mboxH[131612871054103210261171106210321026817374340333324]21 cm and OH 18 cm lines observed with the newly commissioned Five-hundred-meter Aperture Spherical radio Telescope(FAST)toward PKS 1413+135 at z=0.24671,we obtain Δg _(p)/g_(p)=(−4.3±2.5)×10^(−5),which is more than two orders of magnitude more sensitive than previous constraints.In addition,we obtain sensitive constraints ofΔ(μα^(2))/(μα^(2))=(2.0±1.2)×10^(−5) and Δ(μα^(2)g_(p)^(0.64))/(μα^(2)g_(p)^(0.64))=(−4.7±1.9)×10^(−6).
