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- W2056714395 abstract "HD 185510 (= V1379 Aql) is an eclipsing binary containing a K0 III/IV star with an active chromosphere and a hot subluminous companion (HD 185510B), previously classified as a subdwarf B star. Radial velocities for the hot star measured at both quadratures with IUE show that the system has a large mass ratio, |$M_text p/M_text s = 7.45pm 0.15$|. Atmospheric parameters derived from UV spectrophotometry and Lyα indicate that Teff = 25000 ± 1000 K and log g ∼ 6.0. Ground-based and ultraviolet photometry constrain the orbital inclination (|$90^circ ge ige70^circ$|), indicating masses of |$2.3-2.8enspace M_odot$| for the K star and |$0.31-0.37enspace M_odot$| for the hot star. The observation bears directly on theories for the late evolution of low-mass stars. HD 185510B is not a subdwarf B star in the classical sense, since its surface gravity is too high. It is probable that HD 185510 is a post-Algol system, in which enhanced mass loss during late case B mass exchange accounts for the low mass of the hot star. HD 185510B is either a low-mass helium main-sequence star or a nascent helium degenerate. It will ultimately become a low-mass (|$sim 0.3enspace M_odot$|) white dwarf." @default.
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- W2056714395 date "1992-09-01" @default.
- W2056714395 modified "2023-10-18" @default.
- W2056714395 title "The hot subdwarf in the eclipsing binary HD 185510" @default.
- W2056714395 doi "https://doi.org/10.1093/mnras/258.1.64" @default.
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