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• W2821388372 abstract "A huge optical luminosity of the supercritical accretion disc and powerful stellar wind in the high-mass X-ray binary SS433 make it difficult to reliably estimate the mass ratio of the binary components from spectroscopic observations. We analyze different indirect methods of the mass ratio estimate. We show that with an account of the possible Roche lobe overflow by the optical star, the analysis of X-ray eclipses in the standard and hard X-ray bands suggests the estimate $q=M_mathrm{x}/M_mathrm{v}gtrsim 0.3$. We argue that the double-peak hydrogen Brackett lines in SS433 should form not in the accretion disc but in a circumbinary envelope, suggesting a total mass of $M_mathrm{v}+M_mathrm{x}gtrsim 40 M_odot$. The observed long-term stability of the orbital period in SS433 $|dot P_b/P_b|le 1.793times 10^{-14}$~s$^{-1}$ over $sim 28$ year period is used to place an independent constraint of $qgtrsim 0.6$ in SS433, confirming its being a Galactic microquasar hosting a superaccreting black hole." @default.
• W2821388372 created "2018-07-19" @default.
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• W2821388372 date "2018-07-14" @default.
• W2821388372 modified "2023-10-15" @default.
• W2821388372 title "On masses of the components in SS433" @default.
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• W2821388372 doi "https://doi.org/10.1093/mnras/sty1853" @default.
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