Tristan Pinsonneault-Marotte
Postdoctoral Research Fellow at KIPACResearch Interests
It's remarkable that we can point telescopes at the sky to gather information about the Universe on the largest scales and from there uncover truths about fundamental physics. Over the last few decades, observational cosmology has altered and sharpened our knowledge of the constituents and dynamics of the Universe as measurements have grown increasingly precise, also revealing widening gaps in our understanding. I am excited to take part in the next generation of experiments that is making progress filling those gaps, whether it concerns the nature of Dark Energy of the sum of neutrino masses. I am particularly interested in using cross-correlations of observations at different wavelengths to leverage the complementarity of a growing number of cosmological surveys. Combining different tracers will be a powerful way to get more out of the data and validate our conclusions about the physics.
I am currently a member of the Simons Observatory (SO) - the largest CMB experiment to date - and the Canadian Hydrogen Intensity Mapping Experiment (CHIME), a large radio telescope that we built in British Columbia, Canada, including the world's most powerful digital radio correlator. These instruments are very different in design and scale, and they represent fields at very different stages of development - CMB and HIM - and I am uniquely positioned at the intersection of the two. I believe that contributing to the development of an instrument puts you in the best position to later analyse the data, and my current focus is on software development for the SO detector readout system and analysis of CHIME data in cross-correlation with an external survey.
Education
- PhD Physics, University of British Columbia (2023)
- MSc Physics, University of British Columbia (2018)
- BSc Honours Physics, McGill University (2016)
Selected Publications
- CHIME Collaboration, Holographic Beam Measurements of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) (2024). The Astrophysical Journal, arXiv:2408.00172
- Satterthwaite et al., The Simons Observatory: studies of detector yield and readout noise from the first large-scale deployment of microwave multiplexing at the large aperture telescope (2024). Proceedings of the SPIE, arxiv:2406.01844
- CHIME Collaboration, A Detection of Cosmological 21 cm Emission from CHIME in Cross-correlation with eBOSS Measurements of the Lyman- α Forest (2023). The Astrophysical Journal, arXiv:2309.04404
- CHIME Collaboration, Detection of Cosmological 21 cm Emission with the Canadian Hydrogen Intensity Mapping Experiment (2022). The Astrophysical Journal, arXiv:2202.01242
- CHIME Collaboration, An Overview of CHIME, the Canadian Hydrogen Intensity Mapping Experiment (2022). The Astrophysical Journal Supplement Series, arXiv:2201.07869
- CHIME/FRB Collaboration, The First CHIME/FRB Fast Radio Burst Catalog (2021). American Astronomical Society meeting #238, arXiv:2106.04352
- CHIME/FRB Collaboration, Observations of fast radio bursts at frequencies down to 400 megahertz (2019). Nature (2019)
- Bandura et al., ICE: a scalable, low-cost FPGA-based telescope signal processing and networking system (2016). Journal of Astronomical Instrumentation, arXiv:1608.06262