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- W2806026783 abstract "Context . In the context of a large campaign to determine the system parameters of high mass transfer cataclysmic variables, we found VY Scl in a low state in 2008. Aims . Making use of this low state, we study the stellar components of the binary with little influence of the normally dominating accretion disc. Methods . Time-resolved spectroscopy and photometry of VY Scl taken during the low state are presented. We analysed the lightcurve and radial velocity curve and use time-resolved spectroscopy to calculate Doppler maps of the dominant emission lines. Results . The spectra show narrow emission lines of H α , H β , He I , Na I D, and Fe II , as well as faint TiO absorption bands that trace the motion of the irradiated secondary star, and H α and He I emission line wings that trace the motion of the white dwarf. From these radial velocities, we find an orbital period of 3.84 h, and put constraints on binary parameters such as the mass ratio M 2 / M 1 of 0.43 and the inclination of 15°. With a secondary’s mass between 0.3 and 0.35 M ⊙ , we derive the mass for the white dwarf as M 1 = 0.6–1.1 M ⊙ ." @default.
- W2806026783 created "2018-06-13" @default.
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- W2806026783 date "2018-09-01" @default.
- W2806026783 modified "2023-09-22" @default.
- W2806026783 title "Catching VY Sculptoris in a low state" @default.
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- W2806026783 doi "https://doi.org/10.1051/0004-6361/201732566" @default.
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