University of Wisconsin–Madison

Month: February 2026

New Paper: Two Habitable Planets in the TOI-700 System, One on the Edge of Habitability

Posted on

A new paper recently published in Publications of the Astronomical Society of the Pacific explores whether tightly packed planetary systems can host habitable worlds over billions of years. The paper, Dynamical Interactions and Habitability in the TOI-700 Multi-planet System, was led by Coleman Nelson, a 2025 undergraduate alumni of the University of Wisconsin–Madison. The study …

When Giant Planets Move In: Why Warm Jupiters Can Keep Their Inner Neighbors (and Hot Jupiters Usually Can’t)

Posted on

My new paper, published in ApJ this month, tackles a question I always assumed the answer was “no” to in exoplanet dynamics: if a giant planet becomes a close-in hot/warm Jupiter via high-eccentricity tidal migration, can any short-period inner planets survive the chaos? What about ultra-short period companions? Using a mix of analytic estimates and …