A truncated accretion disk in the galactic black hole source H1743-322

Abstract

To investigate the geometry of the accretion disk in the source H1743-322, we have carried out a detailed X-ray temporal and spectral study using RXTE pointed observations. We have selected all data pertaining to the Steep Power Law (SPL) state during the 2003 outburst of this source. We find anti-correlated hard X-ray lags in three of the observations and the changes in the spectral and timing parameters (like the QPO frequency) confirm the idea of a truncated accretion disk in this source. Compiling data from similar observations from other sources, we find a correlation between the fractional change in the QPO frequency and the observed delay. We suggest that these observations indicate a definite size scale in the inner accretion disk (the radius of the truncated disk) and we explain the observed correlation using various disk parameters like Compton cooling time scale, viscous time scale etc..

arXiv comment12 pages, 6 figures. accepted for the publicatin in RAA

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• Anti-correlated Soft Lags in the Intermediate State of Black Hole Source GX 339-4
• 2016 outburst of H~1743--322: \textit{XMM-Newton} and \textit{NuSTAR} view
• The Dynamics of Truncated Black Hole Accretion Disks I: Viscous, Hydrodynamic Case
• Cross-correlations between soft and hard light curves depending on luminosity in the transient neutron star XTE J1701-462
• Investigating the coronal structure by studying time lags in the Atoll source 4U 1705-44 using AstroSat
• A study of the cross-correlation and time lag in black hole X-ray binary XTE J1859+226
• A magnetic model for low/hard state of black hole binaries