Prospects for Taiji to detect a gravitational-wave background from cosmic strings

Autor:	Chen, Zu-Cheng, Huang, Qing-Guo, Liu, Chang, Liu, Lang, Liu, Xiao-Jin, Wu, You, Wu, Yu-Mei, Yi, Zhu, You, Zhi-Qiang
Rok vydání:	2023
Předmět:	Astrophysics - Instrumentation and Methods for Astrophysics Astrophysics - Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology
Druh dokumentu:	Working Paper
DOI:	10.1088/1475-7516/2024/03/022
Popis:	Recently, multiple pulsar timing array collaborations have presented compelling evidence for a stochastic signal at nanohertz frequencies, potentially originating from cosmic strings. Cosmic strings are linear topological defects that can arise during phase transitions in the early Universe or as fundamental strings in superstring theory. This paper focuses on investigating the detection capabilities of Taiji, a planned space-based gravitational wave detector, for the gravitational wave background generated by cosmic strings. By analyzing simulated Taiji data and utilizing comprehensive Bayesian parameter estimation techniques, we demonstrate a significant improvement in precision compared to the NANOGrav 15-year data, surpassing it by an order of magnitude. This highlights the enhanced measurement capabilities of Taiji. Consequently, Taiji can serve as a valuable complementary tool to pulsar timing arrays in validating and exploring the physics of cosmic strings in the early Universe. Comment: 24 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2310.00411 Zobrazit plný text záznamu View this record from Arxiv