2024/04/09 by Jie Liao, Liao, Jie, M. Ghasemi-Nodehi +9 · 1 citation
Engineering · Physics and Astronomy · #FOS: Physical sciences #Gamma-ray bursts and supernovae #General Relativity and Quantum Cosmology (gr-qc) #High Energy Astrophysical Phenomena (astro-ph.HE) #Particle Accelerators and Free-Electron Lasers #Pulsars and Gravitational Waves Research
paper · pdf · doi:10.48550/arxiv.2404.06020
openalex publication_date 2024/04/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Iron line spectroscopy has been one of the leading methods not only for measuring the spins of accreting black holes but also for testing fundamental physics. Basing on such a method, we present an analysis of a dataset observed simultaneously by NuSTAR and NICER for the black hole binary candidate MAXI J1803-298, which shows prominent relativistic reflection features. Various relxillnk flavors are utilized to test the Kerr black hole hypothesis. The results obtained from our analysis provide stringent constraints on Johannsen deformation parameter α13 with the highest precise to date, namely α13=0.023+0.071-0.038 from relxillDnk and α13=0.006+0.045-0.022 from relxillionnk respectively in 3-σ credible lever, where Johannsen metric reduces to Kerr metric when α13 vanishes. Furthermore, we investigate the best model-fit results using Akaike Information Criterion and assess its systematic uncertainties.