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James Rogers / IoA
Wednesday 15 October 2025, 13:15-13:40
Miscibility in sub-Neptunes
- 👤 Speaker: James Rogers / IoA
- 📅 Date & Time: Wednesday 15 October 2025, 13:15 - 13:40
- 📍 Venue: Hoyle Lecture theatre + Zoom
Abstract
Sub-Neptunes are found around 50% of Sun-like stars in our galaxy. Despite their ubiquity, we lack a comprehensive understanding of their interior structure. I will present the first evolving interior structure model for sub-Neptunes that accounts for the expected miscibility between silicate magma and hydrogen. I will discuss the concept of “binodal surfaces”, which represent phase transitions within sub-Neptunes and provide a physically/chemically informed boundary between a planet’s “interior”’ and “envelope”. I will discuss the many implications of miscibility, and a potential observational route to testing its prevalence.
Series This talk is part of the Institute of Astronomy Seminars series.
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