Hello there! I'm a PhD candidate in astrophysics at the University of Amsterdam.

In September 2023, I started my PhD at the Anton Pannekoek Institute for Astronomy, where I work with Dr. Silvia Toonen and Dr. Eva Laplace on the evolution of multiple-star systems. I develop analytical models and run numerical simulations to study how stellar interactions in binary and triple systems shape their orbital evolution, ultimate fate, and the transient phenomena they produce in both electromagnetic and gravitational-wave radiation. I am a core member of the LISA Consortium and of the BLOeM collaboration.

Before that, I completed my undergraduate studies in Physics at Aristotle University of Thessaloniki, where I worked with Dr. Padelis Papadopoulos and Dr. Kleomenis Tsiganis. I also spent a semester abroad at the University of Lancashire, where I worked with Dr. Dimitris Stamatellos. For my Master’s thesis, I investigated mass transfer from a tertiary star onto the inner binary using hydrodynamical simulations, under the supervision of Dr. Silvia Toonen.

Research

Interests
• Formation and evolution of binaries and triples
• Mass transfer in circular and eccentric orbits
• Gravitational wave sources
Methods
• Analytical modeling
• Population synthesis
• Hydrodynamical simulations

Publications

First-author papers

2025

Parkosidis, A., Stamatellos, D., & Riaz, B.

Astronomy & Astrophysics, 696, A104

Talks & Events

Mass Transfer in Eccentric Binaries: A Unified Framework & New Insights
Binary Stars in a New Era
Lijiang, China
Date: August 25, 2025
Contributed talk
Mass Transfer in Eccentric Binaries: A Unified Framework & New Insights
Netherlands Astronomy Conference
Nijmegen, Netherlands
Date: May 28, 2025
Contributed talk