Evolution of QPOs in GX 339-4 and EXO 1846-031 with Insight-HXMT and NICER

Cosimo Bambi; Divya Rawat; Honghui Liu; Long Ji; Pengju Wang; Ranjeev Misra; ShuangNan Zhang; Shu Zhang; Zuobin Zhang

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Evolution of QPOs in GX 339-4 and EXO 1846-031 with Insight-HXMT and NICER

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arxiv 2305.18249 v2 pith:WTSYZNCT submitted 2023-05-29 astro-ph.HE

Zuobin Zhang , Honghui Liu , Divya Rawat , Cosimo Bambi , Ranjeev Misra , Pengju Wang , Long Ji , Shu Zhang

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Shuangnan Zhang

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classification astro-ph.HE

keywords qposevolutionfrequencyinsight-hxmtnicerspectralstatetype-c

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We conduct a spectral and timing analysis of GX 339-4 and EXO 1846-031 with the aim of studying the evolution of Type-C QPOs with spectral parameters. The high cadence data from Insight-HXMT and NICER allow us to track them. Type-C QPOs appear at the end of low-hard state and/or hard-intermediate state. The results reveal that the QPO frequency is closely related to the inner disk radius and mass accretion rate in the two sources. Such a correlation is nicely consistent with the dynamic frequency model.

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