Mapping Dark Matter via Gravitational Lensing

CosmoAI-AES is an inter-disciplinary research group at the Department of ICT and Natural Sciences at NTNU in Ålesund, working on gravitational lensing.

• Professor Hans Georg Schaathun is a computer scientist working on simulation and machine learning
• Dr Ben David Normann is a mathematical physicist working on cosmology

These pages present software prototypes which we have made publicly available. So far one prototype is presented in fairly stable format with some documentation. CosmoSim is a simulator of gravitational lensing, supporting both an interactive and graphical user interface, and a command line interface for bulk generation of images.

CosmoSim - the simulator

• Installation, see the README file in the Source repository
• User Tools
• Test Scripts
• Software Model - technical documentation
• Simulation Model - technical documentation of the simulator library
  • Raytrace Simulation
  • Roulette Simulation (Overview)

Machine Learning with CosmoSim

• Machine Learning Examples

The Mathematics of CosmoSim

• Basic Notation
  • LensPotential
  • Critical Curves
• Roulette formulæ
• Lens Models
• PointMassCloud (in progress)

Development

• Release Process
• Workflows in github

Publications

If you build on our work, please cite one of our [[Publications]].

1. Hans Georg Schaathun, Ben David Normann, and Kenny Solevåg-Hoti. Om å kartleggja mørk materie med maskinlæring. In Norsk IKT-konferanse for forskning og utdanning, number 1, 2023.
2. Hans Georg Schaathun, Ben David Normann, Einar Leite Austnes, Simon Ingebrigtsen, Sondre Westbø Remøy, and Simon Nedreberg Runde. On the simulation of gravitational lensing. In Enrico Vicario, Romeo Bandinelli, Virginia Fani, and Michele Mastroianni, editors, Proceedings of the 30th European Conference on Modelling and Simulation. ECMS - European Council for Modelling and Simulation, 2023. Florence, Italy, 21-23 June 2023.