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We Finally Have The First-Ever Evidence of Cosmic Superaccelerators in Our Galaxy

6 APRIL 2021
A cosmic gamma ray detected zipping across the Milky Way has broken the record for the most energetic we ve found yet, clocking in at a whopping 957 trillion electronvolts (teraelectronvolts, or TeV).

This not only more than doubles the previous record, it brings us close to the range of petaelectronvolts (that s a quadrillion electronvolts) - finally confirming the existence of cosmic superaccelerators that can boost photons to these energies in the Milky Way.
Such a superaccelerator is called a PeVatron, and finding them could help us figure out what is producing the high-energy gamma rays streaking across the galaxy.
This pioneering work opens a new window for the exploration of the extreme Universe, said physicist Jing Huang of the Chinese Academy of Sciences in China. The observational evidence marks an important milestone toward revealing cosmic ray origins, which have puzzled mankind for more than one century. ....

Jing Huang , Masato Takita , University Of Tokyo , Institute Of High Energy Physics , Chinese Academy Of Sciences , Milky Way , Chinese Academy , Crab Nebula , High Energy Physics , Air Shower , Large High Altitude Air Shower Observatory , Cherenkov Telescope Array , Southern Wide Field Gamma Ray Observatory , Physical Review , ஜிங் ஹுவாங் , பல்கலைக்கழகம் ஆஃப் டோக்கியோ , நிறுவனம் ஆஃப் உயர் ஆற்றல் இயற்பியல் , சீன கலைக்கழகம் ஆஃப் அறிவியல் , பால் வழி , சீன கலைக்கழகம் , நண்டு நெபுலா , உயர் ஆற்றல் இயற்பியல் , அேக மழை , பெரியது உயர் உயரம் அேக மழை கண்காணிப்பு , தெற்கு பரந்த புலம் காமா ராய் கண்காணிப்பு , உடல் விமர்சனம் ,

Physics - Signs of PeVatrons in Gamma-Ray Haze

Signs of PeVatrons in Gamma-Ray Haze
April 5, 2021•
Physics 14, 41
A diffuse glow of high-energy gamma rays hints at the presence of powerful cosmic accelerators, called PeVatrons, within the disk of our Galaxy.
Tibet AS
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experiment detects high-energy gamma rays by observing showers of particles produced when the gamma rays hit molecules in Earth’s atmosphere.
Tibet AS
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experiment detects high-energy gamma rays by observing showers of particles produced when the gamma rays hit molecules in Earth’s atmosphere.×
The interstellar medium is filled with relativistic charged particles mostly protons and helium nuclei. Spaceborne telescopes and earthbound observatories have revealed that these cosmic rays can have energies exceeding ....

United States , Milky Way , Magallanesy Antaica Chilena , Petra Huentemeyer , Galactic Center , University Of Utah , Los Alamos National Laboratory , University Of Hamburg , Northern Hemisphere Of The Galactic Center , Department Of Physics , Michigan Technological University , Professor Of Physics At Michigan Technological University , Crab Nebula , High Altitude Water Cherenkov Observatory , Galactic Plane , Alan Stonebraker , Large High Altitude Air Shower Observatory , Cherenkov Telescope Array , Canary Islands , Southern Wide Field Gamma Ray Observatory , South America , Solar System , Southern Hemisphere , Northern Hemisphere , Los Alamos National , Southern Wide Field Gamma Ray ,

High-energy particle accelerators within our galaxy discovered -- Science & Technology -- Sott.net

Fri, 02 Apr 2021 17:48 UTC
Move over, CERN. Unknown sources in the Milky Way dubbed PeVatrons accelerate protons to energies of a few peta-electronvolts - dozens of times higher than the yield of the Large Hadron Collider.
Now, new data from a high-altitude experiment in Tibet confirm that such very-high-energy cosmic rays are indeed produced in our own galaxy.
© APS; Background (atomic hydrogen distribution): HEASARC / LAMBDA / NASA / GFSC
Ultra high-energy diffuse gamma rays (yellow points) are distributed along the Milky Way Galaxy. The gray shaded area indicates the area outside the detectors field of view. The results paint a much fuller picture of the PeVatron population in the Milky Way, says Pat Harding (Los Alamos National Laboratory), who was not involved in the study. ....

La Palma , Los Alamos , United States , Milky Way , Magallanesy Antaica Chilena , Masato Takita , Kelly Malone Los Alamos National Laboratory , American Physical Society , Kazumasa Kawata University Of Tokyo , Pat Harding Los Alamos National Laboratory , Large Hadron , Pat Harding , Los Alamos National Laboratory , Physical Review Letters , Michigan Tech , Cygnus Cocoon , Kazumasa Kawata , High Energy Physics , Chinese Academy , Large High Altitude Air Shower Observatory , Cherenkov Telescope Array , Southern Wide Field Gamma Ray Observatory , Kelly Malone , லா பால்மா , லாஸ் அலமோஸ் , ஒன்றுபட்டது மாநிலங்களில் ,

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 ,

Not so fast, supernova: highest-energy cosmic rays detected in star clusters

Not so fast, supernova: highest-energy cosmic rays detected in star clusters
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United States , Henrike Fleischhack , Petra Huentemeyer , Binita Hona , Sabrina Casanova , Dezhi Huang , University Of Wisconsin , Michigan Technological University , Catholic University , High Altitude Water Cherenkov , Cygnus Cocoon , Nature Astronomy , Astrophysical Journal , Nuclear Physics Polish Academy , Roger Blanford , Southern Wide Field Gamma Ray Observatory , ஒன்றுபட்டது மாநிலங்களில் , பினிடா ஹோனா , சப்ரினா காஸநோவா , பல்கலைக்கழகம் ஆஃப் விஸ்கான்சின் , மிச்சிகன் தொழில்நுட்ப பல்கலைக்கழகம் , கத்தோலிக் பல்கலைக்கழகம் , சிக்னஸ் கூட்டை , இயற்கை வானியல் , வானியற்பியல் இதழ் , அணு இயற்பியல் போலீஷ கலைக்கழகம் ,