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Abstract: Over the past decade, Kepler, Gaia, and TESS have revolutionized our view of exoplanets and their host stars.  A major goal is now to understand what processes sculpt the observed exoplanet population.  Two key steps toward this goal are measuring more precise ages for host stars and developing new frameworks for characterizing stellar and planetary environments.  In the first part of this talk, I will highlight the role of open clusters, describe how a revised view of dissolving, unbound groups in the solar neighborhood has impacted exoplanet age dating, and assess the strengths and limitations of rotation‐based and lithium-based ages for isolated field‐star hosts.  In the second part, I will discuss how new space‐based photometry and high‐resolution spectroscopy are revealing warped, likely dusty plasma tori around pre–main‐sequence red dwarfs.  Though the origin of these structures remains unclear, I'll close by outlining some implications for the plasma and magnetospheric environments experienced by young, close‐in exoplanets.

Hosted by Professor Elisabeth Newton

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https://dartmouth.zoom.us/j/99365435133?pwd=HaYoFEpyvlH5rTdl6rJBc8acLaBpwP.1

Meeting ID: 993 6543 5133
Email Physics.Department@dartmouth.edu for passcode