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- W4251010908 abstract "Horizontal branch (HB) models were evolved using the Yale stellar evolution code, YREC, to test the possibility that mass loss during the RR Lyrae phase is able to produce the observed color (mass) dispersion on the HB (Willson and Bowen 1984) and the anomalous period changes in RR Lyrae stars (Laskarides 1974). Models of total mass 0.64, 0.66, 0.68, 0.70, and 0.72 M ⊙ (Y MS = 0.23, Z = 0.001) were evolved with constant mass loss rates of 0, 10 -10 , and 10 -9 M ⊙ yr -1 . Mass loss was assumed to occur only in the RR Lyrae phase, and the instability strip was defined by 3.800 < log T eff < 3.875. HB stars which lose mass evolve further to the blue. Low mass loss rates do not affect the shape of the tracks significantly. Stars, which without mass loss could not become blue HB stars, were able to emerge from the instability strip on the blue side." @default.
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- W4251010908 date "1993-01-01" @default.
- W4251010908 modified "2023-09-30" @default.
- W4251010908 title "Mass-Loss During the RR Lyrae Phase of the HB: Mass Dispersion on the HB and RR Lyrae Period Changes" @default.
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- W4251010908 doi "https://doi.org/10.1017/s0252921100117713" @default.
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