The X-ray Outburst of H1743-322: High-Frequency QPOs with a 3:2 Frequency Ratio

Abstract

We observed the 2003 X-ray outburst of H1743-322 in a series of 130 pointed observation with RXTE. We searched individual observations for high-frequency QPOs (HFQPOs) and found only weak or marginal detections near 240 and 160 Hz. We next grouped the observations in several different ways and computed the average power-density spectra (PDS) in a search for further evidence of HFQPOs. This effort yielded two significant results for those observations defined by the presence of low-frequency QPOs (0.1-20 Hz) and an absence of ``band-limited'' power continua: (1) The 9 time intervals with the highest 7-35 keV count rates yielded an average PDS with a QPO at $166\pm 5$ Hz. ($4.1\sigma$; 3--35 keV); and (2) a second group with lower 7-35 keV count rates (26 intervals) produced an average PDS with a QPO at $242\pm 3$ Hz ($6.0\sigma$; 7--35 keV). The ratio of these two frequencies is $1.46\pm 0.05$. This finding is consistent with results obtained for three other black hole systems that exhibit commensurate HFQPOs in a 3:2 ratio. Furthermore, the occurrence of H1743-322's slower HFQPO at times of higher X-ray luminosity closely resembles the behavior of XTE J1550-564 and GRO J1655-40. We discuss our results in terms of a resonance model that invokes frequencies set by general relativity for orbital motions near a black-hole event horizon.

arXiv comment12 pages, 3 figures, submitted to ApJ

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• Delayed Outburst of H 1743--322 in 2003 and relation with its other outbursts
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• Spectro-temporal studies of rapid transition of the quasi periodic oscillations in the black hole source H1743-322
• Discovery of a 7 mHz X-Ray Quasi-periodic Oscillation from the most Massive Stellar-mass Black Hole IC 10 X-1
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• 2016 outburst of H~1743--322: \textit{XMM-Newton} and \textit{NuSTAR} view
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• AstroSat Observation of 2016 Outburst of H 1743-322
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• QPOML: A Machine Learning Approach to Detect and Characterize Quasi-Periodic Oscillations in X-ray Binaries
• Investigating the connection between Quasi Periodic Oscillations and spectral components with NuSTAR data of GRS 1915+105