Category Archives: Research

IceCube observation of the cosmic-ray anisotropy in the Southern Hemisphere

Extremely energetic charged particles called cosmic rays are accelerated by violent cosmic objects before raining [...]

An artist's impression of cosmic rays coming down from the sky onto an observatory
A novel technique to search for ultra-high-energy photons using the Pierre Auger Observatory

Cosmic rays, the highest energy particles of the universe, bombard Earth from all directions and [...]

A projection of the gamma-ray sky as seen by the Fermi Large Area Telescope.
Seeking the Sources of Ultra-High-Energy Cosmic Rays

This story is modified from one originally published by AAS Nova. Where do the highest-energy particles in [...]

WIPAC researchers set new limits on the origins of the Galactic neutrino emission detected by IceCube

Neutrinos are tiny, nearly massless particles that travel cosmological distances unhindered, acting as messengers that [...]

Improving in-ice particle shower models for reconstruction of IceCube events

The IceCube neutrino detector, embedded in a cubic kilometer of Antarctic ice, searches for high-energy [...]

HAWC discovers the highest energy light coming from the sun

This story is adapted from the Michigan State University (MSU) press release. Sometimes, the best [...]

IceCube search for sub-TeV neutrino emission associated with LIGO/Virgo gravitational waves

Gravitational waves (GWs) are produced by some of the most extreme astrophysical phenomena, such as [...]

IceCube analysis indicates there are many high-energy astrophysical neutrino sources 

Back in 2013, the IceCube Neutrino Observatory—a cubic-kilometer neutrino detector embedded in Antarctic ice—announced the [...]

Newly discovered optical effect allows IceCube to deduce ice crystal properties

Every second, 100 trillion neutrinos pass through the human body. These tiny, almost massless particles [...]

An image showing a newly discovered PeVatron (in pink) hosted by a supernova remnant (in green) called G106.3+2.7. The supernova remnant is believed to have formed together with the pulsar (in magenta) about 10,000 years ago. Particles accelerated by the shock waves of the supernova remnant interact with the gas in the interstellar medium, producing high-energy gamma-ray emission. Credit: Jayanne English, University of Manitoba, NASA/Fermi/Fang et al. 2022, and Canadian Galactic Plane Survey/DRAO.
Study led by UW–Madison researcher confirms star wreck as source of extreme cosmic particles

Astronomers have long sought the launch sites for some of the highest energy protons in [...]