Ryota Tomaru
The thermal-radiative wind in low mass X-ray binary H~1743-322; Radiation hydrodynamic simulations
Tomaru, Ryota; Done, Chris; Ohsuga, Ken; Nomura, Mariko; Takahashi, Tadayuki
Authors
Professor Christine Done chris.done@durham.ac.uk
Professor
Ken Ohsuga
Mariko Nomura
Tadayuki Takahashi
Abstract
Blueshifted absorption lines are seen in high inclination black hole binary systems in their disc dominated states, showing these power an equatorial disc wind. While some contribution from magnetic winds remain a possibility, thermal and thermal-radiative winds are expected to be present. We show results from radiation hydrodynamic simulations which show that the additional radiation force from atomic features (bound-free and lines) are important along with electron scattering. Together, these increase the wind velocity at high inclinations, so that they quantitatively match the observations in H 1743-322, unlike purely thermal winds which are too slow. We highlight the role played by shadowing of the outer disc from the (sub grid) inner disc Compton heated layer, and show that the increase in shadow from the higher Compton temperature after the spectral transition to the hard state leads to strong suppression of the wind. Thermal-radiative winds explain all of the spectral features (and their disappearance) in this simplest wind system and magnetic winds play only a minor role. We speculate that thermal-radiative winds can explain all the spectral features seen in the more complex (larger disc size) binaries, GRO J1655-40 and GRS 1915+105, without requiring magnetic winds.
Citation
Tomaru, R., Done, C., Ohsuga, K., Nomura, M., & Takahashi, T. (2019). The thermal-radiative wind in low mass X-ray binary H~1743-322; Radiation hydrodynamic simulations. Monthly Notices of the Royal Astronomical Society, 490(3), 3098-3111. https://doi.org/10.1093/mnras/stz2738
Journal Article Type | Article |
---|---|
Acceptance Date | Aug 4, 2019 |
Online Publication Date | Oct 3, 2019 |
Publication Date | Dec 30, 2019 |
Deposit Date | Aug 22, 2019 |
Publicly Available Date | Aug 22, 2019 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 490 |
Issue | 3 |
Pages | 3098-3111 |
DOI | https://doi.org/10.1093/mnras/stz2738 |
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Copyright Statement
This article has been accepted for publication in the Monthly notices of the Royal Astronomical Society ©: 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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