Several pulsar timing array(PTA) collaborations have recently reported the evidence for a stochastic gravitational-wave background(SGWB), which can unveil the formation of primordial seeds of inhomogeneities in the ea...Several pulsar timing array(PTA) collaborations have recently reported the evidence for a stochastic gravitational-wave background(SGWB), which can unveil the formation of primordial seeds of inhomogeneities in the early universe. With the SGWB parameters inferred from PTAs data, we can make a prediction of the seeds for early galaxy formation from the domain walls in the axion-like particles(ALPs) field distribution. This also naturally provides a solution to the observation of high redshifts by the James Webb Space Telescope. The predicted photon coupling of the ALP is within the reach of future experimental searches.展开更多
基金supported by the National Natural Science Foundation of China (Grant Nos.12275134,12147228,12335005,and 12275232)by Maxim Khlopov was carried out at Southern Federal University with financial support from the Ministry of Science and Higher Education of the Russian Federation (Grant No.GZ0110/2310-IF)+2 种基金supported by the National Natural Science Foundation of China (Grant Nos.12005180,and 12305113)the Natural Science Foundation of Shandong Province (Grant Nos.ZR2020QA083,and ZR2022QA026)the Project of Shandong Province Higher Educational Science and Technology Program (Grant No.2022KJ271)。
文摘Several pulsar timing array(PTA) collaborations have recently reported the evidence for a stochastic gravitational-wave background(SGWB), which can unveil the formation of primordial seeds of inhomogeneities in the early universe. With the SGWB parameters inferred from PTAs data, we can make a prediction of the seeds for early galaxy formation from the domain walls in the axion-like particles(ALPs) field distribution. This also naturally provides a solution to the observation of high redshifts by the James Webb Space Telescope. The predicted photon coupling of the ALP is within the reach of future experimental searches.
