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Dr. Anna Julia Poser

Postdoctoral Researcher • PLATO Mission - Exoplanets

Address
Malteserstr. 74-100
Room D310
12249 Berlin
Email
anna.julia.poser[at]fu-berlin.de

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 

Supervisors: 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. My research refines theoretical models and supports the characterisation of planets.

At FU, I am working on the characterisation of exoplanets to be observed by ESA’s PLATO mission, focusing on interior structure modelling. As part of this, I am developing a machine learning–based tool to infer the composition of exoplanets from PLATO data, aiming to bridge theoretical models and observational constraints.  

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!