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| Paper: |
Recent Periodic Variations in Three Gamma Doradus Variables |
| Volume: |
135, A Half Century of Stellar Pulsation Interpretations: a Tribute to Arthur N. Cox |
| Page: |
497 |
| Authors: |
Kaye, A. B.; Bagnuolo, W. G.; Hall, D. S.; Henry, G. W. |
| Abstract: |
We present both multi-color differential photometry taken with the Vanderbilt University / Tennessee State University 16'' Automatic Photoelectric Telescope and high resolution, high signal-to-noise optical spectroscopy taken with the Georgia State University 1.0 - meter Multi-Telescope Telescope of three suspected gamma Doradus-type variable stars. We calculate power spectra for the time series represented by both the photometry and the spectroscopy in order to search for periodic variability. Based on these power spectra and the power distribution across the line profiles at these signal frequencies, we conclude that the periodic variations are a results of multiple gravity-mode oscillations. These three objects are a part of a new class of pulsating variable star found to the cool side of the Ceheid instability strip, a region previously thought to be a photometrically RsafeS region. |
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