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| Paper: |
Replicated Échelle Diagrams in Asteroseismology: A Tool for Studying Mixed Modes and Avoided Crossings |
| Volume: |
462, Progress in Solar/Stellar Physics with Helio- and Asteroseismology |
| Page: |
195 |
| Authors: |
Bedding, T. R. |
| Abstract: |
In oscillating stars, mixed modes have p-mode character in the envelope and
g-mode character in the core. They are observed in subgiants and red
giants, in which the large density gradient outside the core effectively
divides the star into two coupled cavities. This leads to the phenomenon
of mode bumping, in which mode frequencies are shifted from their regular
spacing as they undergo avoided crossings. This short contribution
introduces a new diagram that involves extending the traditional échelle
diagram by replication. This new diagram should prove a useful way of
displaying mixed modes and helping to identify missing modes that may lie
below the detection threshold. |
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