Curriculum vitae · updated August 2026

Ioannis Papathanasiou

Physics graduate · computational physicist

Thessaloniki, Greecegiannis.papathanasiou.pth@gmail.comgithub.com/PapathanasiouIoannispapathanasiouioannis.github.io

Profile

Physics graduate and early-career computational physicist working on dense-matter equations of state, relativistic stellar structure, and reproducible scientific software. Focused on connecting explicit physical models to compact-star behaviour through numerical and statistical methods, with particular attention to validation, provenance, and scientific scope.

Continued post-BSc research collaboration and guidance with Charalampos Moustakidis and Theodoros Diakonidis; scientific interpretation and responsibility retained by Ioannis Papathanasiou.

Research work

Controlled BSk24 sound-speed deformations

Developed a fail-closed workflow for smooth sound-speed modifications, effective cold-barotrope reconstruction, and TOV/tidal response calculations. Released versioned software and checksum-verified campaign evidence; sole-authored public arXiv preprint arXiv:2608.23033v1.

Machine Learning Classification of Neutron Star Composition

Built a synthetic equation-of-state, stellar-structure, and machine-learning workflow to study restricted compact-star model discrimination. A subsequent audit narrowed the defensible classification scope and documented leakage, provenance, and generalization risks.

Post-thesis classifier audit and interactive demonstrations

Audited and redeveloped the restricted synthetic classification workflow, with physical-family partitioning and explicit interpretation limits. Developed separate baseline and perturbation-sensitivity demonstrations whose outputs are labelled as uncalibrated model scores rather than astrophysical probabilities.

Preprints

Signed Sound-Speed Deformations of BSk24-Anchored Barotropes: Neutron-Star Response

Submitted 2026-08-24; cross-listed in astro-ph.HE. Public arXiv preprint, not peer reviewed or journal published; no journal submission is planned.

Selected software

Neutron-star EoS toolkit

Audited alpha development work · Python · no formal release.

Education

Degree in Physics, Aristotle University of Thessaloniki

Undergraduate thesis: Machine Learning Classification of Neutron Star Composition(10/10). Official examiners: Charalampos Moustakidis, Theodoros Diakonidis, and Theodoros Gaitanos.

Methods and tools

Equation-of-state modelling; TOV and tidal calculations; numerical ODE integration; supervised learning with grouped validation; reproducible workflows and provenance.

Python, NumPy, SciPy, pandas, scikit-learn, Jupyter, Git, and LaTeX.

Additional experience

Store operations specialist, IMIA Print Shop

Customer-facing production and order coordination; developed small Python utilities for batch printing and label generation.