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Astronomy Colloquium - Sarah Millholland

Artist’s impression of COROT-7b, an ultra-short-period planet. [ESO/L. Calçada]
April 20, 2023
3:00 pm - 4:00 pm
In Person & Online: Chem & Biomolecular Eng & Chem (CBEC) - Room 130; Zoom Webinar

Title: Systems of Short-Period Exoplanets: Regularities and Anomalies

Abstract:

Exoplanetary systems containing multiple close-in, sub-Neptune-sized planets are ubiquitous, representing a dominant outcome of planet formation. These systems exhibit a striking degree of architectural regularity and uniformity, such as nearly circular and coplanar orbits, regular orbital spacings, and intra-system correlations in planetary masses and radii. Beyond this first-order structure, however, these systems also display mysterious anomalies that require explanations. This talk will address three “architectural anomalies” from both observational and theoretical perspectives. I will propose that several of these anomalies can be explained by considerations of planet-planet and planet-star dynamical interactions.

Speaker: Sarah Millholland (MIT)

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