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Solving a cosmic (ray) mystery – Astronomy Now


An infrared image of dust clouds in the Cocoon nebula captured by NASA’s retired Spitzer Space Telescope. An overlay (in green to yellow to red) indicates rgions of gamma-ray emissions where cosmic rays may be generated. Image: TeV: Binita Hona (HAWC Collaboration), IR: Hora et. al, Spitzer’s Growing Legacy, ASP Conference Series, 2010, P. Ogle, ed.
Conventional wisdom holds that high-energy cosmic rays crashing into Earth’s atmosphere at the speed of light, triggering showers of cascading particles, are generated in powerful supernova blasts.
Not so fast, researchers say.
As it turns out, supernovae, which do indeed generate high-energy gamma rays, are not powerful enough to explain the petaelectronvolt (PeV) energies observed with the most extreme cosmic ray events. Instead of supernovae, new research suggests, star clusters featuring closely packed type O and type B stars are responsible, acting as so-called PeVatron accelerators. ....

Henrike Fleischhack , Petra Huentemeyer , Binita Hona , Sabrina Casanova , Dezhi Huang , Michigan Technological University , Catholic University , Spitzer Space , Growing Legacy , Michigan Technological , Nuclear Physics Polish Academy , Nature Astronomy , Astrophysical Journal Letters , High Altitude Water Cherenkov , Southern Wide Field Gamma Ray Observatory , பினிடா ஹோனா , சப்ரினா காஸநோவா , மிச்சிகன் தொழில்நுட்ப பல்கலைக்கழகம் , கத்தோலிக் பல்கலைக்கழகம் , ஸ்பிட்சர் இடம் , வளர்ந்து வரும் மரபு , மிச்சிகன் தொழில்நுட்ப , அணு இயற்பியல் போலீஷ கலைக்கழகம் , இயற்கை வானியல் , வானியற்பியல் இதழ் எழுத்துக்கள் , தெற்கு பரந்த புலம் காமா ராய் கண்காணிப்பு ,

HAWC Gamma Ray Observatory discovers origin of highest-energy cosmic rays in the galaxy


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IMAGE: An infrared image of the dust clouds in the Cocoon region taken with the Spitzers Space Telescope s IR photometer. The HAWC TeV gamma-ray excess (color from green to yellow to.
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Credit: TeV: Binita Hona (HAWC Collaboration), IR: Hora et. al, Spitzer s Growing Legacy, ASP Conference Series, 2010, P. Ogle, ed.
LOS ALAMOS, N.M., March 11, 2021 A long-time question in astrophysics appears to finally be answered, thanks to a collection of large, high-tech water tanks on a mountainside in Mexico. The High-Altitude Water Cherenkov (HAWC) data shows that the highest-energy cosmic rays come not from supernovae, but from star clusters. ....

United States , Los Alamos , Patrick Harding , Henrike Fleischhack , Binita Hona , Sabrina Casanova , Petra Huentemeyer , Kelly Malone , Dezhi Huang , Galactic Science Working Group , Science Centre , Roger Blandford At Stanford University , University Of Utah , National Science Foundation , Los Alamos National Laboratory , Regents Of The University California , Battelle Memorial Institute , University Of Wisconsin , Texasam University System , Department Of Energy National Nuclear Security Administration , Michigan Technological University , Catholic University , High Altitude Water Cherenkov , Cygnus Cocoon , Nature Astronomy , Nuclear Physics Polish Academy ,