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- W2912476138 abstract "We present LAMOST data on 168 γ Doradus (γ Dor) pulsating stars including stellar atmospheric parameters of 137 variables and spectral types for all of the samples. The distributions of period (P), temperature (T), gravitational acceleration (log(g)) and metallicity [Fe/H] are shown. It is found that most γ Dor variables are main-sequence stars with early F spectral types and temperatures from 6880 K to 7280 K. They are slightly more metal poor than the Sun with a metallicity range from −0.4 to 0. On the H-R and log g–T diagrams, both the γ Dor and δ Scuti (δ Sct) stars occupy in the same region and some are beyond the borders predicted by current stellar pulsation theories. It is discovered that the physical properties of γ Dor stars are similar to those of long-period δ Sct (P > 0.3 d) stars. The stellar atmospheric parameters are all correlated with the pulsation period for short-period δ Sct variables (P < 0.3 d), but there are no such relations for γ Dor or long-period δ Sct stars. These results reveal that γ Dor and long-period δ Sct are the same group of pulsating stars and they are different from short-period δ Sct variables. Meanwhile, 33 γ Dor stars are identified as candidates of binary or multiple systems." @default.
- W2912476138 created "2019-02-21" @default.
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- W2912476138 date "2019-01-01" @default.
- W2912476138 modified "2023-10-07" @default.
- W2912476138 title "Physical properties of <i>γ</i> Doradus pulsating stars and their relationship with long-period <i>δ</i> Scuti variables" @default.
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- W2912476138 doi "https://doi.org/10.1088/1674-4527/19/1/1" @default.
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