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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2404.06020 |
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Table of Contents:
- 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 relxill_nk flavors are utilized to test the Kerr black hole hypothesis. The results obtained from our analysis provide stringent constraints on Johannsen deformation parameter $α_{13}$ with the highest precise to date, namely $α_{13}=0.023^{+0.071}_{-0.038}$ from relxillD_nk and $α_{13}=0.006^{+0.045}_{-0.022}$ from relxillion_nk respectively in 3-$σ$ credible lever, where Johannsen metric reduces to Kerr metric when $α_{13}$ vanishes. Furthermore, we investigate the best model-fit results using Akaike Information Criterion and assess its systematic uncertainties.