New Observations of the Beat Cepheid U Trianguli Australis

R. R. Shobbrook, D. J. Faulkner
1978 Publications Astronomical Society of Australia  
The double-mode or beat Cepheids continue to pose a number of interesting questions in our search for an understanding of the pulsation properties of stars near the short period end of the instability strip. One such is how simultaneous pulsations in the fundamental and first overtone radial modes can occur for an appreciable fraction of Cepheids in the period range 1d < Pо < 5d.
doi:10.1017/s1323358000015526 fatcat:ogpkyftd7femti3hylgexohsba