Ongoing research projects

• Gaia satellite: Composition, Formation and Evolution of the Galaxy
• Object classification and astrophysical parameter estimation
  • finding rare objects (quasars)
  • forward modelling with ILIUM
  • Bayesian inference
  • 3D extinction modelling
  • and their application to the large surveys Gaia and Pan-STARRS
• astroimpacts: Astronomical impacts on terrestrial climate and biodiversity (mass extinctions)
• Open cluster and stellar association census with Pan-STARRS and SDSS/SEGUE
• Substellar (brown dwarf) luminosity and mass function in stellar clusters (see publications)

Some earlier projects

• Classification and parametrization of unresolved galaxy spectra (e.g. this paper)
• Rotation, variability and atmospheres of ultracool dwarfs
• Infrared parallax measurements of T dwarfs
• Gaia Classification working group
• Angular momentum evolution and disks in low mass stars in young open clusters (see publications)
• Design of photometric systems using evolutionary algorithms
• Omega 2000: A wide field near infrared camera
• Modelling of materials forging for the prediction of microstructure
• Gaussian Process modelling
• Neural network classification of stellar spectra

Algorithms and software

• ctsmod, a Bayesian method for modelling time series
• artmod, a Bayesian time series analysis method for time-of-arrival data. Used in the impact crater modelling project
• Aeneas (formerly called "q method"), a Bayesian method for estimating stellar parameters and line-of-sight interstellar extinction using photometry/spectra, apparent magnitude, parallax and the HRD
• bayespeak, a Bayesian peak finding/fitting algorithm (under development)
• ILIUM. A forward-model based algorithm for estimating parameters from multivariate data
• growclust, cluster finder (under development)
• [PanDiSC] and PanSteP: classifier and stellar parametrizer for Pan-STARRS
• statnet: a feedforward interpolation neural network
• dynet: a recurrent neural network for dynamic process modelling
• photsim: a photometric simulator (simulates photon counts and noise in arbitrary filters
  for a specified instrument model given a source spectral energy distribution)
• HFD: Heuristic Filter Design (automatically design photometric systems
  to parametrizer or isolate specified types of objects)