Browsing by Subject "Stars: oscillations"
Now showing items 1-2 of 2
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Short time-scale frequency and amplitude variations in the pulsations of an roAp star: HD 217522
(Oxford Univ Press, 2015)Photometric observations of HD 217522 in 1981 revealed only one pulsation frequency ν1 = 1.215 29 mHz. Subsequent observations in 1989 showed the presence of an additional frequency ν2 = 2.0174 mHz. New observations in ... -
Whole Earth Telescope discovery of a strongly distorted quadrupole pulsation in the largest amplitude rapidly oscillating Ap star
(Oxford Univ Press, 2018)We present a new analysis of the rapidly oscillating Ap (roAp) star, 2MASS J19400781 − 4420093 (J1940; V = 13.1). The star was discovered using SuperWASP broad-band photometry to have a frequency of 176.39 d−1 (2041.55 μHz; ...