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Wednesday, 12 March 2025, 15:30 in P8445B
Dr. Yukari Uchibori (UBC)
The quest to capture dark energy
Dark energy is a mysterious entity driving the accelerated expansion of the universe. Its nature remains one of the biggest open questions in modern cosmology. The Canadian Hydrogen Intensity Mapping Experiment (CHIME), a novel radio interferometer, is designed to probe this mystery by mapping the large-scale structure of the universe through the 21 cm emission line of neutral hydrogen. CHIME specifically measures the expansion rate during the critical epoch when dark energy’s influence became non-negligible. This seminar provides an overview of CHIME’s innovative design, observational techniques, and recent breakthroughs, including the first successful detections of 21 cm emission through cross-correlation studies. It also highlights CHIME’s broader contributions to astrophysics, such as fast radio burst and pulsar research. Additionally, the seminar introduces key cosmological concepts necessary to understand CHIME’s mission, ensuring accessibility to physicists at all levels, including undergraduates.
Seminars in 2024:
2025-01-22 15:30 in P8445A - Kazuya Koyama (ICG, Porstmouth): Theory activities in Euclid 2025-01-24 14:30 in BLU9660 - Dragan Huterer (Michigan): Cosmological results from DESI (physics colloquium) 2025-03-12 15:30 in P8445B - Yukari Uchibori (UBC): The quest to capture dark energy 2025-03-19 15:30 in P8445A - David Miller (UBC): Probing stellar evolution with the white dwarf initial-final mass relation 2025-06-02 15:00 in P8445B - Helena Garcia Escudero (UC Irvine): Beyond the Comfort of ΛCDM: Massive neutrinos, extra neutrinos, and other surprises in cosmology
[ See complete seminar archives | iCal feed ]
Modified by Andrei Frolov <frolov@sfu.ca> on 2025-11-24