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Application of the Thermal Wind Model to Absorption Features in the Black Hole X-ray Binary H 1743$-$322

Shidatsu, Megumi; Done, Chris

Application of the Thermal Wind Model to Absorption Features in the Black Hole X-ray Binary H 1743$-$322 Thumbnail


Authors

Megumi Shidatsu



Abstract

High inclination black hole X-ray binaries exhibit blueshifted ionized absorption lines from disk winds, whose launching mechanism is still in debate. The lines are predominantly observed in the high/soft state and disappear in the low/hard state, anticorrelated with the jet. We have tested if the thermal winds, which are driven by the irradiation of the outer disk by the X-rays from the inner disk, can explain these observed properties or whether we need a magnetic switch between jet and wind. We use analytic thermal-radiative wind models to predict the column density, ionization parameter, and velocity of the wind given the broadband continuum shape and luminosity determined from the Rossi X-ray Timing Explorer (RXTE) monitoring. We use these to simulate the detailed photoionized absorption features predicted at epochs where there are Chandra high-resolution spectra. These include low/hard, high/soft, and very high states. The model was found to well reproduce the observed lines in the high/soft state, and it also successfully predicts their disappearance in the low/hard state. However, the simplest version of the thermal wind model also predicts that there should be strong features observed in the very high state, which are not seen in the data. Nonetheless, we show this is consistent with thermal winds when we include self-shielding by the irradiated inner disk atmosphere. These results indicate that the evolution of observed wind properties in different states during outbursts in H1743−322 can be explained by the thermal wind model and does not require magnetic driving.

Citation

Shidatsu, M., & Done, C. (2019). Application of the Thermal Wind Model to Absorption Features in the Black Hole X-ray Binary H 1743$-$322. Astrophysical Journal, 885(2), Article 112. https://doi.org/10.3847/1538-4357/ab46b3

Journal Article Type Article
Acceptance Date Sep 20, 2019
Online Publication Date Nov 6, 2019
Publication Date Nov 10, 2019
Deposit Date Sep 20, 2019
Publicly Available Date Oct 17, 2019
Journal Astrophysical Journal
Print ISSN 0004-637X
Publisher American Astronomical Society
Peer Reviewed Peer Reviewed
Volume 885
Issue 2
Article Number 112
DOI https://doi.org/10.3847/1538-4357/ab46b3

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© 2019. The American Astronomical Society. All rights reserved.






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