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In oscillating stars, mixed modes have p-mode character in the envelope andg-mode character in the core. They are observed in subgiants and red giants, inwhich the large density gradient outside the core effectively divides the starinto two coupled cavities. This leads to the phenomenon of mode bumping, inwhich mode frequencies are shifted from their regular spacing as they undergoavoided crossings. This short contribution introduces a new diagram thatinvolves extending the traditional echelle diagram by replication. This newdiagram should prove a useful way of displaying mixed modes and helping toidentify missing modes that may lie below the detection threshold.

Replicated Echelle Diagrams in Asteroseismology: A Tool for Studying Mixed Modes and Avoided Crossings