Category: Cosmology

Dark Energy Survey scientists release new analysis of how the universe expands

The latest results combined weak lensing and galaxy clustering and incorporated four dark energy probes from a single experiment for the first time. This story is amended from one published by Fermilab, which includes information about the full results published by the DES collaboration The Dark Energy Survey (DES) collaboration — including scientists at the …

UW–Madison physicists play key role in international observatory

UW–Madison physicists join Simons Observatory

In the 27 years that Peter Timbie has been a UW–Madison physics professor, he has largely been able to conduct cutting-edge research in the field of the cosmic microwave background, or CMB, with just himself and a handful of graduate students or other researchers in his group. “You can’t do that anymore,” Timbie says. “Now, …

Earth-sized planet discovered in ‘our solar backyard’

A team of astronomers have discovered a planet closer and younger than any other Earth-sized world yet identified. It’s a remarkably hot world whose proximity to our own planet and to a star like our sun mark it as a unique opportunity to study how planets evolve. The new planet was described in a new …

UW physicists part of study offering unique insights into the expansion of the universe

This post is modified from one originally published by Fermilab In the culmination of a decade’s worth of effort, the Dark Energy Survey collaboration of scientists analyzed an unprecedented sample of nearly 1,500 supernovae classified using machine learning. They placed the strongest constraints on the expansion of the universe ever obtained with the DES supernova …

Physics PhD student Stephen McKay named ALMA ambassador

Congrats to physics graduate student Stephen McKay on being named an ALMA ambassador! ALMA, or the Atacama Large Millimeter/submillimeter Array, is the largest radio telescope in the world. It can detect light radiated by clouds of dust grains in some of the earliest and most distant galaxies in the Universe. Researchers can submit proposals to …

Jimena González joins Bouchet Graduate Honor Society

This story was originally posted by the Graduate School Five outstanding scholars, including Physics PhD student Jimena González, are joining the UW–Madison chapter of the national Edward Alexander Bouchet Graduate Honor Society this academic year. The Bouchet Society commemorates the first person of African heritage to earn a PhD in the United States. Edward A. …

Federal physics advisory panel — including Profs. Bose and Cranmer — announces particle physics recommendations

Earlier this year, physics professors Tulika Bose and Kyle Cranmer were selected to serve on the Particle Physics Project Prioritization Panel, or P5, a group of High Energy Physics experts that advises the Department of Energy Office of Science and the National Science Foundation’s Division of Physics on high energy and particle physics matters. P5 …

Jimena González wins 2023 OSG David Swanson Award

Early in her thesis research, Jimena González was waiting. A lot. To better understand the nature of dark energy, she uses machine learning to search Dark Energy Survey cosmology data for evidence of strong gravitational lensing — where a heavy foreground galaxy bends the light of another galaxy, producing multiple images of it that can …

Through machine learning maps, cosmic history comes into focus

By Jason Daley, UW–Madison College of Engineering For millennia, humans have used optical telescopes, radio telescopes and space telescopes to get a better view of the heavens. Today, however, one of the most powerful tools for understanding the cosmos is the computer chip: Cosmologists rely on processing power to analyze astronomical data and create detailed …