Gamma-Ray Observatory Collects Best View of Cosmic Explosion courthousenews.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from courthousenews.com Daily Mail and Mail on Sunday newspapers.
last place I d guess would be in hellish accretion disks around supermassive black holes.
then they d grow huge.
I can t remember the last time I read a journal paper and muttered “holy crap” under my breath so many times.
Stars usually form in vast clouds of gas and dust. Parts of the cloud collapse under their own gravity, and these knots then condense to form stars. Massive stars burn through their nuclear fuel rapidly and explode as supernovae, but stars like the Sun live much longer. The gas cloud either dissipates or that kind of star leaves it over time, going on to live a stable life for billions of years in the cold vacuum of space.
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Connecting smallest and largest scales Cosmic particle accelerators like blazars (artist’s impression) are typical objects for multi-messenger astronomy (Image credit: DESY, Science Communication Lab)
Established in 2019 with its central hub at CERN, the European Consortium for Astroparticle Theory (EuCAPT) aims to bring together the European community of theoretical astroparticle physicists and cosmologists to tackle some of the greatest mysteries in science.
There are strong hints that explanations for dark matter and dark energy, the origin of high-energy cosmic rays, the matter-antimatter asymmetry, and other enigmas about the universe at large lie in the domain of particle physics. Addressing them therefore demands a highly interdisciplinary approach by a strong and diverse community.
February 27, 2021
Astronomers found a high energy neutrino – a cosmic ray – that apparently originated during a “tidal disruption event,” that is, when a supermassive black hole shredded a distant star.
Artist’s concept of a tidal disruption event, when a star comes too close to a supermassive black hole and gets shredded. A situation like this may light up the host galaxy many times greater than its normal brightness. Image via DESY/ Science Communication Lab.
Cosmic rays are high-energy particles that travel through space at close to the speed of light. Many origins of cosmic rays have been suggested, and some confirmed; for example, supernova explosions generate them. But supernovae can’t explain the quantity of cosmic rays bombarding Earth at all times, and so cosmic ray origins are still largely mysterious. In particular, high-energy neutrinos are largely unexplained (although some come from blazars). Now, astronomers have pinpointed the origin of a high-energy ne