With this first measurement, HAWC reveals fine structure in the cosmic-ray energy spectrum at the TeV scale.
The new measurement determines the cross section for neutrino energies between 6.3 TeV and 980 TeV, energy levels more than an order of magnitude higher than previous measurements.
Photo: Martin Wolf/ IceCube NSF
By catching and counting particles of light streaming forth from these nearby stellar engines, the HAWC Collaboration has showed that these two pulsars are very unlikely to be the origin of the excess—despite being the right age and the right distance from Earth to contribute. Positrons from these sources simply haven’t spread far enough to reach Earth in sufficient numbers. The results are published today in Science.
The U.S. Department of Energy has awarded $12.5 million to the University of Wisconsin–Madison to develop an integrated facility that will expand the frontier of astrophysical plasma research.
“The vision for this new user facility is that roughly half of the research will be done by outside scientists who come here and establish a collaboration with us,” says Cary Forest, a professor of physics at UW–Madison and the lead researcher for WiPPL. “It’s like having a much bigger team to do things that we never imagined we’d be doing.”
Photo credit: Jeff Miller
Are you interested in majoring in Physics? Come to P.U.M.P., an informational meeting for Prospective Undergraduate Majors in Physics. Tuesday, October 3rd at 4:30pm, Chamberlin Hall 2241.
MONDAY, AUGUST 21, 5:30 PM
MMoCA will present ART+ Mass on Monday, August 21 in conjunction with Forward Fest. This event will offer a dialogue on art as a lens and tool for exploring and documenting new discoveries in particle physics. The panel will feature:
- Artist Sonja Thomsen, whose immersive lobby installation at MMoCA is meant to transform a viewer’s encounters with light, space, time, and movement. Thomsen’s interest lies in “creating spaces that highlight the inaccessible. There should always be a place for wonder; it is a direct line to new knowledge.”
- Professor Wesley H. Smith. Bjorn Wiik Professor of Physics at UW-Madison, who has been deeply involved in work on the Large Hedron Collidor used to discover the Higgs Boson particle. The so-called “God particle” is believed to be responsible for giving matter mass and shaping the very early universe.
Astronomers and astrophysicists expect that fast radio bursts (FRBs) happen all the time. Some estimates predict there are up to 10,000 per day. But they are not easy to detect. Telescopes with a wide field of view often don’t have good resolution. And the ones that have good resolution usually come with a much smaller field of view and might be missing them all the time.
FRBs are so short that regular follow-up observations by other radio or optical telescopes are not realistic. This could be a depressing scenario for scientists, but guess what: neutrinos might come to the rescue.
Geoff and Josie Fox combined backgrounds in physics and art history, an appreciation for adventure, and a willingness to change course to gain incredible traction in the action sports industry.