About
My professional thoughts revolve around computational statistics and physics. At the Max-Planck Institute for Astrophysics, I apply Bayesian statistics to imaging algorithms for radio telescopes. I aim to squeeze out all information present in radio data sets in order to arrive at the highest resolution possible together with uncertainty quantification. To this end, I develop theoretical models for inference algorithms and tailor them for the unification of calibration and imaging, multi-spectral imaging, polarization imaging, data fusion with single dish data and Very Long Baseline Interferometry (VLBI).
These ideas are condensed into various software projects: NIFTy (a Python library for Bayesian inference of fields), resolve (my radio imaging library), vlbi_resolve (the same thing for dynamic VLBI imaging) and ducc (which includes a non-uniform FFT specialized for radio interferometry). I hold a PhD in physics and am part of Rüdiger Westermann’s group (TU Munich) and Torsten Enßlin’s information field theory group (MPA Garching). My professional work is funded by the Ministry of Education and Research (BMBF) in context of the Verbundprojekt D-MeerKAT project.
During my masters at Heidelberg University I focused on String Theory, Quantum Field Theory and pure maths.
Papers and Publications
Reviewed papers
See also: arXiv, Google Scholar
- Multi-Component Imaging of the Fermi Gamma-ray Sky in the Spatio-spectral Domain, under review: arXiv
- Variable structures in M87* from space, time and frequency resolved interferometry, Nature Astronomy (2022): arXiv, doi, presentation material, software, data products, MPA article (en de), press material
- Deep images of the Galactic center with GRAVITY, A&A, A82 (2022): arXiv, doi, MPG article (de, en), YouTube animation
- Efficient wide-field radio interferometric response, A&A 646, A58 (2021): arXiv, doi
- Towards Bayesian Data Compression, Annalen der Physik 2021, 2000508: arXiv, doi
- Comparison of classical and Bayesian imaging in radio interferometry, A&A 646, A84 (2021): arXiv, doi, pdf (600dpi), data products, MPA article (de, en)
- Unified Radio Interferometric Calibration and Imaging with Joint Uncertainty Quantification, A&A 627, A134 (2019): arXiv, doi
- Radio Imaging With Information Field Theory, 2018 26th European Signal Processing Conference (EUSIPCO): arXiv, doi
- Terminal Singularities, Milnor Numbers, and Matter in F-theory, Journal of Geometry and Physics 123, 71-97, 2018: arXiv, doi
Theses
- Dissertation (2021): pdf
- Master thesis (2016): pdf, tex
- Bachelor thesis (2014): pdf, tex
Misc
- NIFTy5 (Numerical Information Field Theory v5), 2019. ASCL
Software
Talks
Invited Talks
- Speaker at the course “Was die Welt im Innersten zusammenhält: Gottesfrage und Naturwissenschaften”, July 5-9, 2021
- Seminar, June 2021, Center for Astrophysics, Cambridge, Massachusetts, United States (resources)
- ODSL (Origin Data Science Lab) Journal Club, June 2020, Garching, Germany
- Seminar “TRR146: Multiscale Simulation Methods for Soft Matter Systems”, Jan 2020, Mainz, Germany
- Institute colloquium, May 2019, Würzburg, Germany
- Bayesian Imaging and Gridding workshop, May 2019, Cambridge University, UK
- Institute colloquium, Center for Astrophysics and Space Physics, North-West University, Nov 2018, Potchefstroom, South Africa
- Institute colloquium, Max-Planck Institute for Intelligent Systems, Oct 2018, Tübingen, Germany
- Plenary talk, SKA Bursary Conference, Nov 2017, Cape Town, South Africa
Contributed Conference Talks
- AT-AP-RASC 2022: 3rd URSI Atlantic Radio Science Meeting, June 2022, Gran Canaria, Spain (resources)
- Radio Imaging Workshop, May 2022, Ballito, South Africa
- D-MeerKAT Collaboration meeting, June 2020, video conference
- LOFAR MKSP Annual Meeting, June 2020, video conference
- Radio2019 Symposium: Recent progress in radio astronomy, Oct 2019, Dortmund, Germany
- LOFAR MKSP Annual Meeting, Sep 2019, Bochum, Germany
- Monitoring the Nonthermal Universe, Sep 2018, Cochem, Germany
- IEEE European Signal Processing Conference, Sep 2018, Rome, Italy
- The Power of Faraday Tomography, May 2018, Miyasaki, Japan
- D-MeerKAT Collaboration meeting, Mar 2018, Würzburg, Germany
Workshops (co-)organized by me
- NIFTy7+GRAVITY workshop (organized by Julia Stadler and me), Aug 2021, Garching, Germany (more)
- Signal reconstruction with Python (contribution), seminar at LMU, September 2020, Garching, Germany
- NIFTy6 introduction (organized by me) May 2020, video conference (more)
- Bayesian Imaging meets Radio Reality II (organized by Torsten Enßlin and me), Aug 2019, Garching, Germany (more)
- Bayesian Imaging meets Radio Reality (organized by Torsten Enßlin and me), Jul 2018, Garching, Germany
Attended workshops
- Radio Imaging Workshop, May 2022, Ballito, South Africa
- Workshop on state of the art in sampling and clustering (contribution), October 2020, Garching, Germany
- Radio Imaging Workshop, Dec 2018, Cape Town, South Africa
- Science with the MPIfR-MT Prototyp Telescope, Apr 2018, Bonn, Germany
Teaching
Co-supervised master students
- Julian Rüstig (Combined Inference of Single Dish and Interferometric Radio Data)
- Fabian Kapfer (Multi-frequency radio calibration)
- Jongseo Kim (Generative models for pattern formation)
- Simon Ding (Multi-frequency radio imaging)
- Crystal Mele (tba)
- Richard Fuchs (tba)
Misc
- MPA highlight on my work (Jan 01, 2021): en de
- MPA highlight on my work (Jan 01, 2022): en de
- IFT collaboration guide: pdf
- I maintain a mailing list on which relevant content for Bayesian imaging and radio interferometry is communicated. If you want to subscribe, please drop me an email (see below).
Impressum, Datenschutzerklärung, Haftungsausschluss