Suzaku Observations of the Black Hole H1743-322 in Outburst

Abstract

We observed the Galactic black hole candidate H1743-322 with Suzaku for approximately 32 ksec, while the source was in a low/hard state during its 2008 outburst. We collected and analyzed the data with the HXD/PIN, HXD/GSO and XIS cameras spanning the energy range from 0.7-200 keV. Fits to the spectra with simple models fail to detect narrow Fe XXV and Fe XXVI absorption lines, with 90% confidence upper limits of 3.5 eV and 2.5 eV on the equivalent width, respectively. These limits are commensurate with those in the very high state, but are well below the equivalent widths of lines detected in the high/soft state, suggesting that disk winds are partially state-dependent. We discuss these results in the context of previous detections of ionized Fe absorption lines in H1743-322 and connections to winds and jets in accreting systems. Additionally, we report the possible detection of disk reflection features, including an Fe K emission line.

16 pages, 4 figures, 4 tables. Accepted for publication in ApJ.

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• The Evolution of Radio Loud Active Galactic Nuclei as a Function of Black Hole Spin
• Stratified Magnetically-Driven Accretion-Disk Winds and Their Relations to Jets
• The Disk-Wind-Jet Connection in the Black Hole H 1743-322
• Absorption lines from magnetically-driven winds in X-ray binaries
• The effects of thermodynamic stability on wind properties in different low mass black hole binary states
• Warm Absorbers and Outflows in the Seyfert-1 Galaxy NGC 4051
• Spectral and Timing Properties of the Black Hole X-ray Binary H 1743-322 in the Low/hard State Studied with Suzaku
• Accretion Disc Wind Variability in the States of the Microquasar GRS 1915+105
• The Case for Massive, Evolving Winds in Black Hole X-ray Binaries
• Swift Observations of MAXI J1659-152: A Compact Binary with a Black Hole Accretor
• Absorption lines from magnetically driven winds in X-ray binaries II: high resolution observational signatures expected from future X-ray observatories
• Impact of the disk magnetization on MHD disk wind signature
• The disk wind in GRS 1915+105 as seen by Insight-HXMT
• Accretion disc winds in X-ray binaries
• A magnetic model for low/hard state of black hole binaries