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Fig. 7


Overlapping mixed modes identified a posteriori in the power density spectra of three red giants. Vertical dotted lines correspond to the dipole mixed-mode frequencies determined using the asymptotic fit. Arrows indicate the modes assigned a posteriori to  = 1 mixed modes. The dashed lines show the threshold level corresponding to eight times the stellar background. Top, KIC 9882316: additional peaks close to the  = 2 and 0 patterns present the characteristics of g-m modes, with a very narrow linewidth. Bottom, KIC 2013502: the peaks at 56.34, 57.06, 57.79, 62.02, 62.88, and 63.77 μHz, that is, close to the uninterrupted series of g-m modes, seem to be  = 1 mixed modes. This is not rare.

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