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The CoRoT Discovery of a Unique Triple-mode Cepheid in the Galaxy

Poretti, E.; Baglin, A.; Weiss, W. W.

The exploitation of the CoRoT treasure of stars observed in the exoplanetary field allowed the detection of a unusual triple-mode Cepheid in the Milky Way, CoRoT 0223989566. The two modes with the largest amplitudes and a period ratio of 0.80 are identified with the first (P ₁ = 1.29 days) and second (P ₂ = 1.03 days) radial …