30 million galaxies seen through 5000 eyes - measuring the expansion of the Universe

Nov 17, 2020 - 6:00 pm to 7:00 pm
Location

Online — Zoom (meeting ID 992 1875 1554, password 094305) and YouTube

Speaker
Dr. Chai-Hsun (Albert) Chuang (Stanford)

30 million galaxies seen through 5000 eyes - measuring the expansion of the Universe

We know that our Universe is expanding, but how fast? Is it getting faster or slowing down? And why? The Dark Energy Spectroscopic Instrument (DESI), a state-of-the-art instrument on the Mayall telescope in Arizona, is equipped with 5,000 robotic optical fibers to capture the lights from 5,000 galaxies at one time. It will observe 30 million galaxies over the next 5 years, producing the largest data set of galaxies with high-resolution measurements of their colors. Find out all about DESI and how we will make a 3D map of the structure of our Universe, understand its expansion and tackle some of the biggest mysteries in cosmology; dark matter and dark energy.

Dr. Chia-Hsun (Albert) ChuangDr. Chia-Hsun (Albert) Chuang is a research scientist at Stanford’s Kavli Institute for Particle Astrophysics and Cosmology (KIPAC). He received his Ph.D. from the University of Oklahoma in 2011, and following postdoctoral research positions in both Spain and Germany, he came to Stanford in 2017. Albert is co-chair of DESI’s simulation working group and is working to prepare the computer simulations of our Universe and the data analysis pipelines that will allow the team to translate maps of the galaxies made by DESI into an understanding of how our Universe is put together and how it is expanding.