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@inproceedings{1646043,
author = {Krtička, Jiří and Kubát, Jiří and Krtičková, Iva},
address = {USA},
booktitle = {Symposium S346 (High-mass X-ray Binaries: Illuminating the Passage from Massive Binaries to Merging Compact Objects)},
doi = {http://dx.doi.org/10.1017/S1743921318007573},
editor = {L.M.Oskinova, E.Bozzo, T.Bulik, D.Gies},
keywords = {Stars: winds; outflows; stars: mass-loss; stars: early-type; X-rays: binaries; hydrodynamics},
howpublished = {elektronická verze "online"},
language = {eng},
location = {USA},
pages = {28-33},
publisher = {Cambridge University Press},
title = {Wind inhibition in HMXBs: the effect of clumping and implications for X-ray luminosity},
url = {https://doi.org/10.1017/S1743921318007573},
year = {2019}
}
TY - JOUR
ID - 1646043
AU - Krtička, Jiří - Kubát, Jiří - Krtičková, Iva
PY - 2019
TI - Wind inhibition in HMXBs: the effect of clumping and implications for X-ray luminosity
PB - Cambridge University Press
CY - USA
KW - Stars: winds
KW - outflows
KW - stars: mass-loss
KW - stars: early-type
KW - X-rays: binaries
KW - hydrodynamics
UR - https://doi.org/10.1017/S1743921318007573
L2 - https://doi.org/10.1017/S1743921318007573
N2 - Winds of hot stars are driven by the radiative force due to absorption of light in the lines of heavier elements. Consequently, the mass-loss rate and the wind velocity depend on the ionization state of the wind. As a result of this, there is a feedback between the ionizing X-ray source and the stellar wind in HMXBs powered by wind accretion. We study the influence of the small-scale wind structure (clumping) on this feedback using our NLTE hydrodynamical wind models. We find that clumping weakens the effect of X-ray irradiation. Moreover, we show that the observed X-ray luminosities of HMXBs can not be explained by wind accretion scenario without introducing the X-ray feedback. Taking into account the feedback, the observed and estimated X-ray luminosities nicely agree. We identify two cases of X-ray feedback with low and high X-ray luminosities that can explain the dichotomy between SFXTs and sgXBs.
ER -
KRTIČKA, Jiří, Jiří KUBÁT and Iva KRTIČKOVÁ. Wind inhibition in HMXBs: the effect of clumping and implications for X-ray luminosity. Online. In L.M.Oskinova, E.Bozzo, T.Bulik, D.Gies. \textit{Symposium S346 (High-mass X-ray Binaries: Illuminating the Passage from Massive Binaries to Merging Compact Objects)}. USA: Cambridge University Press, 2019, p.~28-33. ISSN~1743-9213. Available from: https://dx.doi.org/10.1017/S1743921318007573.
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