2017/12/26 by Xiaokai He, Jiliang Jing, Zhoujian Cao · 1 citation
Mathematics · Physics and Astronomy · #Advanced Mathematical Physics Problems #Black Holes and Theoretical Physics #Cosmological constant #Cosmology and Gravitation Theories #De Sitter universe #Gravitation #Gravitational constant #Gravitational wave #Null (SQL) #Perturbation (astronomy) #Radiation #Spacetime #gr-qc
paper · pdf · doi:10.1142/s0218271818500463
published as International Journal of Modern Physics D, Vol. 27, No. 4 (2018) 1850046 · 11 pages
openalex publication_date 2017/12/26 · openalex created_date 2018/01/05 · arxiv created 2018/03/15 · arxiv updated 2018/03/28 · openalex updated_date 2026/08/05
Gravitational radiation plays an important role in astrophysics. Based on the fact that our universe is expanding, the gravitational radiation when a positive cosmological constant is presented has been studied along with two different ways recently, one is the Bondi–Sachs (BS) framework in which the result is shown by BS quantities in the asymptotic null structure, the other is the perturbation approach in which the result is presented by the quadrupoles of source. Therefore, it is worth to interpret the quantities in asymptotic null structure in terms of the information of the source. In this paper, we investigate this problem and find the explicit expressions of BS quantities in terms of the quadrupoles of source in asymptotically de Sitter spacetime. We also estimate how far away the source is, the cosmological constant may affect the detection of the gravitational wave.