Wave topology of stellar inertial oscillations
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arXiv
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866916479317835776 |
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| author | Leclerc, Armand Laibe, Guillaume Perez, Nicolas |
| author_facet | Leclerc, Armand Laibe, Guillaume Perez, Nicolas |
| contents | Inertial waves in convective regions of stars exhibit topological properties linked to a Chern number of 1. The first of these is a unique, unidirectional, prograde oscillation mode within the cavity, which propagates at arbitrarily low frequencies for moderate azimuthal wavenumbers. The second one are phase singularities around which the phase winds in Fourier space, with winding numbers of $\pm 1$ depending on the hemisphere. Phase winding is a collective effect over waves propagating in all directions that is strongly robust to noise. This suggests a topology-based method for wave detection in noisy observational data. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2411_08457 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Wave topology of stellar inertial oscillations Leclerc, Armand Laibe, Guillaume Perez, Nicolas Solar and Stellar Astrophysics Mesoscale and Nanoscale Physics Inertial waves in convective regions of stars exhibit topological properties linked to a Chern number of 1. The first of these is a unique, unidirectional, prograde oscillation mode within the cavity, which propagates at arbitrarily low frequencies for moderate azimuthal wavenumbers. The second one are phase singularities around which the phase winds in Fourier space, with winding numbers of $\pm 1$ depending on the hemisphere. Phase winding is a collective effect over waves propagating in all directions that is strongly robust to noise. This suggests a topology-based method for wave detection in noisy observational data. |
| title | Wave topology of stellar inertial oscillations |
| topic | Solar and Stellar Astrophysics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2411.08457 |