Department Colloquium | Galaxies Far, Far Away: Mapping the Cosmos with the Dark Energy Survey
Jonathan Blazek (Northeastern University)
Despite tremendous progress in precision cosmology, several core mysteries remain, including the nature of dark energy, dark matter, and gravity. Galaxy surveys, which observe the positions and shapes of galaxies across large areas of the sky, are able to map a significant fraction of our cosmic volume, providing one of the most powerful probes of the Universe. I will describe how we use millions (or billions) of galaxies to measure both galaxy clustering and weak gravitational lensing, and how we learn about the Universe by analyzing these statistics. A significant challenge is that most of the Universe is “dark,” and we must infer from the roughly 5% visible fraction what the remaining 95% is doing. I will focus on the current state of the art, the Year 3 cosmology results from the Dark Energy Survey. I will also preview the exciting future of the field, with the Rubin Observatory and the Dark Energy Spectroscopic Instrument.
Building: | West Hall |
---|---|
Event Type: | Workshop / Seminar |
Tags: | Physics, Science |
Source: | Happening @ Michigan from Department of Physics, Department Colloquia, Undergrad Physics Events |
Events
Featured
Oct
08
2025 Ta-You Wu Lecture in Physics | Einstein, Gravitational Waves, Black Holes and Other Matters
Gabriela González, Boyd Professor of Physics (Louisiana State University)
4:00 PM
Fourth Floor Ampitheatre
Rackham Graduate School (Horace H.)
Upcoming
Sep
11
Quantum Research Institute | TBD
TBD
11:00 AM
2000PML
Virtual
Sep
25
Mohammad Hafezi (University of Maryland)
TBD
11:00 AM
411
Virtual
Oct
09
Quantum Research Institute | TBD
Jeff Thompson (Princeton University)
11:00 AM
2000PML
Virtual