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• W4293102922 abstract "Abstract We have used precise photometric and high-dispersion spectroscopic observations to study nine candidate γ Doradus ( γ Dor) stars, identified as optically variable comparison stars in our photometric studies of Sun-like stars. In this paper, we confirm these nine candidates as new γ Dor variables. All exhibit sinusoidal variability with amplitudes between 6 and 65 mmag in Johnson B and periods from 0.28 to 1.13 days. All lie in the same region of the H-R diagram as our previously confirmed γ Dor stars. Of the nine systems, one is a single-lined spectroscopic binary (SB1), two are double-lined spectroscopic binaries (SB2), and the remaining six are single stars. We present orbits for the three binary systems: HD 34415, HD 144839, and HD 182735. Their periods are 6400 days or 17.5 yr (adopted), 995 ± 7 days, and 1052.4 ± 0.2 days, respectively. We compare our photometric periods with those we derive for six of the nine stars observed with the Transiting Exoplanet Survey Satellite to strengthen the confirmation of these new γ Dor variables. Finally, because the distribution of γ Dor stars in the H-R diagram overlaps with the red edge of the δ Scuti ( δ Sct) instability strip, we use our ground-based photometric results for the 73 γ Dor stars confirmed with our Automatic Photoelectric Telescopes over the past two decades to look at the incidence of hybrid δ Sct/ γ Dor stars; these are highly valuable targets for asteroseismology." @default.
• W4293102922 created "2022-08-26" @default.
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• W4293102922 date "2022-03-21" @default.
• W4293102922 modified "2023-09-27" @default.
• W4293102922 title "Nine Bright γ Doradus Variables Discovered with Ground-based Photometry" @default.
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• W4293102922 doi "https://doi.org/10.3847/1538-3881/ac540b" @default.
• W4293102922 hasPublicationYear "2022" @default.
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