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Testing evolution of LFQPOs with mass accretion rate in GRS 1915+105 with Insight-HXMT

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arxiv 2012.01825 v2 pith:XNMCXKKX submitted 2020-12-03 astro-ph.HE gr-qc

Honghui Liu , Long Ji , Cosimo Bambi , Pankaj Jain , Ranjeev Misra , Divya Rawat , J.S. Yadav , Yuexin Zhang This is my paper · ORCID
classification astro-ph.HEgr-qc
keywords frequencyaccretionratemassdiskevolutionfindinginsight-hxmt
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Using the Insight-HXMT observations of GRS 1915+105 when it exhibits low frequency quasi-periodic oscillations (QPOs), we measure the evolution of the QPO frequency along with disk inner radius and mass accretion rate. We find a tight positive correlation between the QPO frequency and mass accretion rate. Our results extend the finding of previous work with AstroSat to a larger range of accretion rate with independent instruments and observations. Treating the QPO frequency of GRS 1915+105 as the relativistic dynamic frequency of a truncated disk, we are able to confirm the high spin nature of the black hole in GRS 1915+105. We also address the potential of our finding to test general relativity in the future.

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  1. Quasi-Periodic Oscillations due to radiative feedback mechanism between the disc and corona

    astro-ph.HE 2025-07 conditional novelty 6.0 of 10

    A disc-corona radiative feedback loop with a time delay produces QPOs at 1/(tau_A+tau_B), and its analytic power spectrum fits AstroSat data of two black hole binaries.

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