Simon Fraser University
SFU Cosmology Seminars

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Tuesday, 19 November 2019, 14:30 in P8445B

Dr. Richard Shaw (UBC)

Probing Dark Energy with CHIME

CHIME will use Intensity Mapping of the 21cm line of neutral hydrogen to map large-scale structure between redshifts of 0.8 and 2.5. By measuring Baryon Acoustic Oscillations (BAO) we will place constraints on the dark energy equation of state as it begins to dominate the expansion of the Universe, particularly at redshifts poorly probed by current BAO surveys. In this talk I will introduce CHIME, a transit radio interferometer designed specifically for this purpose. I will discuss the promise and pitfalls of Intensity Mapping and describe how we plan to confront the many challenges of such observations, in particular removal of astrophysical foregrounds which are six orders of magnitude larger than the 21cm signal. CHIME started operating at the DRAO in Penticton, BC at the end of 2018 and I will report on current progress and lessons already learned.

Seminars in 2019:

2019-09-10 14:30 in P8445B - Gabor Kunstatter (University of Winnipeg/SFU): What can quantum gravity tell us about the beginning and end of time?
2019-09-17 14:30 in P8445B - Andrei Frolov (SFU): Dust is everywhere
2019-10-08 14:30 in P8445B - Douglas Scott (UBC): Evaporating evidence for Hawking points
2019-10-22 14:30 in P8445B - Arif Babul (UVic): Cosmology with galaxy clusters
2019-11-19 14:30 in P8445B - Richard Shaw (UBC): Probing Dark Energy with CHIME
2019-11-26 14:30 in P8445B - Joanna Woo (SFU): Primer on machine learning for astronomy
2019-12-03 14:30 in P8445B - Ludovic Van Waerbeke (UBC): Axion Quark Nuggets: a candidate for baryonic, cold and strongly interacting dark matter
2020-01-20 15:00 in P8445B - Francesc Ferrer (Washington University): Gravitational wave signals of early universe axion dynamics
2020-02-14 14:30 in C9000 - Katie Mack (North Carolina State University): Dark matter: a cosmological perspective (physics colloquium)
2020-02-26 14:30 in P8445B - Paul Wiegert (University of Western Ontario): Interstellar asteroids and comets: what are they and where do they come from?
2020-02-28 14:30 in C9000 - Sara Ellison (University of Victoria): Clash of the Titans: Galaxy mergers in the nearby Universe (physics colloquium)
2020-05-12 12:00 in Zoom - Levon Pogosian (SFU): Relieving the Hubble tension with primordial magnetic fields
2020-05-19 12:00 in Zoom - José Tomas Gálvez Ghersi (University of Mississippi): Numerical renormalization group-based approach to secular perturbation theory
2020-06-02 12:00 in Zoom - Leo Stein (University of Mississippi): Gravitational-wave tests of GR with simulations of beyond-GR theories
2020-06-16 12:00 in Zoom - Andrei Frolov (Simon Fraser Univeristy): Primordial non-Gaussianity from preheating
2020-07-02 14:30 in Zoom - Jack Gegenberg (University of New Brunswick): Collapse of a rotating shell in 3+1 dimensions (special seminar)
2020-07-07 12:00 in Zoom - Joanna Woo (Simon Fraser Univeristy): Machine learning as a tool for astrophysics
2020-07-28 12:00 in Zoom - José Tomas Gálvez Ghersi (University of Mississippi): A fixed point for black hole distributions

[ See complete seminar archives | iCal feed ]

Modified by Andrei Frolov <frolov@sfu.ca> on 2023-11-01