Abstract: Multiple-planet systems composed of close-in super-Earth/sub-Neptune-sized planets are ubiquitous, representing a dominant outcome of planet formation. This population exhibits predictable hallmarks of architectural regularity and uniformity, such as low eccentricities and inclinations, similar orbital spacings, and intra-system correlations in planetary masses and radii. On top of this first-order structure, however, these systems also exhibit surprising anomalies that require explanations. Examples include (1) ultra-short period planets that have been separated off from the rest of their systems; (2) planet pairs with orbital periods related by a ratio of small integers; and (3) planets that show signs of anomalous radius inflation. In this talk, I will propose that planet-planet and planet-star dynamical interactions can account for these specific anomalies and more. Specifically, I will focus on the role of tidal dissipation due to non-zero planetary axial tilts (obliquities). I will highlight strategies for testing tidal theories and measuring obliquities in the future.

Below you find the connection details for the seminar:

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https://aarhusuniversity.zoom.us/j/65974972623?pwd=a3V6Tmx3V1NqTEdhWmRySVp1Y3RxQT09

Meeting ID: 659 7497 2623

Passcode: SAC2021Sem