University of Waterloo
200 University Avenue West
Waterloo, Ontario, Canada N2L 3G1
Phone: (519) 888-4567 ext 32215
Fax: (519) 746-8115
Since the Universe was filled with hydrogen atoms at early times, the most promising method for observing the epoch of the first stars is to measure the hyperfine line of hydrogen at a wavelength of 21 cm. Such an observation of the "cosmic dawn" era was considered speculative when I helped lay out the theoretical predictions a decade ago, but there is now an enormous, promising observational effort (in which I am involved within the Square Kilometre Array). There is also an important aspect of early cosmic history that can potentially be probed today. The difference between the early evolution of the baryons and the dark matter should imprint a specific signature that can be probed via galaxy surveys. We have recently attempted the first such measurement; detecting this would provide a novel confirmation of the standard cosmological model.
The University of Waterloo acknowledges that much of our work takes place on the traditional territory of the Neutral, Anishinaabeg and Haudenosaunee peoples. Our main campus is situated on the Haldimand Tract, the land granted to the Six Nations that includes six miles on each side of the Grand River. Our active work toward reconciliation takes place across our campuses through research, learning, teaching, and community building, and is centralized within our Office of Indigenous Relations.