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- W3201879863 abstract "We analyse the pulsating behaviour of TIC 308396022 observed by the TESS mission. The star is a high-amplitude $delta$ Sct star (HADS) that shows a very rich amplitude spectrum using the 3-yr light curve. Among these frequencies, the strongest peak of $f_{1}= 13.20362567(12) rm{d^{-1}}$ is identified as the radial fundamental mode, and we also find the first and second overtones ($f_2$ and $f_3$). In the low frequency range (< 2.5 $rm{d^{-1}}$), 22 peaks are identified to be gravity modes, which show a regular period spacing of about 2460,s and have the angular degree $l = 1$. The period spacing pattern does not show a significant downward trend, suggesting the star rotates slowly. We note that this is a $delta$ Sct--$gamma$ Dor hybrid star containing a high-amplitude radial fundamental mode and a regular g-mode period spacing pattern. With O-C analysis, we find the star shows a significant time delay, implying that the star has a companion which is likely to be a white dwarf. The history of possible mass transfer provides a great opportunity to test the current theories of binary evolution, mass transfer, and pulsation." @default.
- W3201879863 created "2021-10-11" @default.
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- W3201879863 date "2021-10-01" @default.
- W3201879863 modified "2023-10-03" @default.
- W3201879863 title "TIC 308396022: a $delta$ Scuti--$gamma$ Doradus hybrid with large-amplitude radial fundamental mode and regular g-mode period spacing." @default.
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