High Energy Cosmic Rays Not From Our Galaxy

 

raymap

This sky map shows the flux of high-energy (E ≥ 8 EeV) cosmic rays used for this study. The cross marks the source of the cosmic rays, while the circles denote the 68% and 95% confidence level regions.
The Pierre Auger Collaboration.

 

Last week, an international team of over 400 researchers from 18 nations finally confirmed that high-energy cosmic rays are not coming from inside the Milky Way Galaxy, but instead from somewhere beyond.

In the study, published September 22 in the journal Science, the researchers gathered over ten years of data taken with the Pierre Auger Observatory to determine whether high-energy cosmic rays were hitting Earth equally from all directions. They are not.

Instead, the researchers found an overabundance of cosmic rays arriving from one specific region in the sky, located about 120 degrees away from our galactic center, in a direction that falls outside the Milky Way’s disk and cannot be associated with any possible sources within the galaxy. The researchers concluded that high-energy cosmic rays must have extragalactic origins.

Source: http://www.astronomy.com/news/2017/09/cosmic-rays-extragalactic-origin

Since high-energy cosmic rays have been associated with cloud formation, I was wondering if the cosmic ray numbers fluxed, or were they a stable stream? If the number was stable, the impact would be the same on cloud formation. However, if they varied over time, the cosmic rays could impact our climate from afar? Does anyone have more information, access to the paper?

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Author: Russ Steele

Freelance writer and climate change blogger. Russ spent twenty years in the Air Force as a navigator specializing in electronics warfare and digital systems. After his service he was employed for sixteen years as concept developer for TRW, an aerospace and automotive company, and then was CEO of a non-profit Internet provider for 18 months. Russ's articles have appeared in Comstock's Business, Capitol Journal, Trailer Life, Monitoring Times, and Idaho Magazine.

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