Dr. Anna Julia Poser
PhD in Theoretical Physics

Postdoc | Planetary Geodynamics • Project Plato - Exoplanet Catalogue
Room D-
12249 Berlin
- 2018 - 2024
PhD in Theoretical Physics at University of Rostock, Germany
Dissertation: From clouds to cores: advancing the understanding of giant irradiated exoplanets
Supervisor: Prof. Dr. Ronald Redmer
- 2014 - 2018
M.Sc. in Physics at University of Rostock, Germany
Semester abroad at Universidad Nacional de La Plata, Argentina and internship at SEAT, S.A., Barcelona, Spain
Thesis: Der Einfluss von Wolken in der Berechnung der Struktureigenschaften großer Exoplaneten
Supervisor: Dr. Nadine Nettelmann, Prof. Dr. Ronald Redmer
- 2011 - 2014
B.Sc. in Physics at University of Rostock, Germany
Thesis: Masse-Radius-Relationen von Exoplaneten
Supervisor: Dr. Andreas Becker, Prof. Dr. Ronald Redmer
I am a physicist who builds planets by making models of their atmospheres, interiors, and long-term evolution.
During my PhD at the University of Rostock, I studied hot Jupiters - gas giant exoplanets orbiting extremely close to their stars - focusing on how atmospheric conditions shape their interior structure and influence radius evolution. One key finding was that deep cloud layers can significantly alter the contraction of a planet’s radius. Additionally, intense irradiation makes the atmosphere behave like a plasma. This plasma, interacting with the magnetic field, may help sustain an inflated planetary radius.
Understanding how planetary interiors and atmospheres interact is key to interpreting exoplanet observations.
At FU, I am working on characterising the planets that will be observed by the ESA PLATO mission.
Research Interests:
- Planet formation and evolution
- Coupled models of the interior, atmosphere and long-term evolution
- Rocky and giant planets, hot Jupiters (but not exclusively)
If you are interested in discussing my research or potential collaborations, feel free to get in touch!