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Close frequencies in pulsating stars: common and mysterious!
M. Breger, A. A. Pamyatnykh
Amplitude and phase variability are commonly found in many different types of pulsating stars. This suggests a common, presently unknown physical origin. We have examined the pheno…
Inferences from pulsational amplitudes and phases for multimode Sct star FG Vir
J. Daszynska-Daszkiewicz, W. A. Dziembowski, A. A. Pamyatnykh +3
We combine photometric and spectroscopic data on twelve modes excited in FG Vir to determine their spherical harmonic degrees, , and to obtain constraints on the star model.…
Various applications of multicolour photometry and radial velocity data for multimode Scuti stars
J. Daszynska-Daszkiewicz, W. A. Dziembowski, A. A. Pamyatnykh +2
In addition to revealing spherical harmonic degrees, , of excited modes, pulsational amplitudes and phases from multicolour photometry and radial velocity data yield a valuab…
Pulsation of the Delta Scuti star Theta2 Tau: New multisite photometry and modelling of instability
M. Breger, A. A. Pamyatnykh, W. Zima +3
The results of a multisite photometric campaign of Theta2 Tau are reported. This binary system consists of evolved and main-sequence A stars inside the instability strip. The 12th…
Close frequency pairs in Delta Scuti stars
M. Breger, K. M. Bischof
The majority of the well-studied Delta Scuti stars show frequency pairs in the power spectra with frequency separations less than 0.06 c/d(0.7 microHz) as well as amplitude variabi…