2 ms·

Thanks this makes sense, My underlying assumption was that a typical star has magnetic acceleration paths which have many orders of magnitude more energy than t

by lumost 4y ago

Thanks this makes sense, My underlying assumption was that a typical star has magnetic acceleration paths which have many orders of magnitude more energy than the LHC (Many intentionally used ambiguously as I have not done the math). I suppose given the energies involved, we would need to observationally ascertain where in the sky the cosmic rays come from in order to put bounds on how they were made and what they are made of. Do yo know of any efforts to observe cosmic ray sources or build a cosmic ray telescope?

shagie 4y ago
> ... we would need to observationally ascertain where in the sky the cosmic rays come from in order to put bounds on how they were made and what they are made of. This is part of the challenge - the map of where they are hint at some hot spots ( https://skyandtelescope.org/astronomy-news/cosmic-rays-hint-hotspot-07152014/ https://skyandtelescope.org/astronomy-news/cosmic-rays-hint-... ) but as these are charged particles (not light) the path that they follow isn't necessarily a "draw a straight like back to the source" > Do yo know of any efforts to observe cosmic ray sources or build a cosmic ray telescope? We don't directly observe the cosmic rays, but rather the cascade of particles that they make as they crash through the atmosphere. There are several different approaches to this. https://en.wikipedia.org/wiki/Cosmic-ray_observatory https://en.wikipedia.org/wiki/Cosmic-ray_observatory For example, there's Ice Cube ( https://en.wikipedia.org/wiki/IceCube_Neutrino_Observatory https://en.wikipedia.org/wiki/IceCube_Neutrino_Observatory ) and a visualization of some of its results - https://youtu.be/2DDQYHIbL3Q https://youtu.be/2DDQYHIbL3Q and https://youtu.be/rSwbL2coz_Y https://youtu.be/rSwbL2coz_Y Another cosmic ray observatory - https://www.auger.org https://www.auger.org // https://en.wikipedia.org/wiki/Pierre_Auger_Observatory https://en.wikipedia.org/wiki/Pierre_Auger_Observatory > But since these high energy particles have an estimated arrival rate of just 1 per km2 per century, the Auger Observatory has created a detection area of 3,000 km2 (1,200 sq mi)—the size of Rhode Island, or Luxembourg—in order to record a large number of these events. It is located in the western Mendoza Province, Argentina, near the Andes. Pierre Auger is looking at air showers - https://en.wikipedia.org/wiki/Air_shower_(physics) https://en.wikipedia.org/wiki/Air_shower_(physics) --- I'd also suggest checking out PBS Space Time (in general) and in particular this episode - The Oh My God Particle - https://youtu.be/osvOr5wbkUw https://youtu.be/osvOr5wbkUw

by lumost 4y ago

shagie 4y ago

> ... we would need to observationally ascertain where in the sky the cosmic rays come from in order to put bounds on how they were made and what they are made of. This is part of the challenge - the map of where they are hint at some hot spots ( https://skyandtelescope.org/astronomy-news/cosmic-rays-hint-hotspot-07152014/ https://skyandtelescope.org/astronomy-news/cosmic-rays-hint-... ) but as these are charged particles (not light) the path that they follow isn't necessarily a "draw a straight like back to the source" > Do yo know of any efforts to observe cosmic ray sources or build a cosmic ray telescope? We don't directly observe the cosmic rays, but rather the cascade of particles that they make as they crash through the atmosphere. There are several different approaches to this. https://en.wikipedia.org/wiki/Cosmic-ray_observatory https://en.wikipedia.org/wiki/Cosmic-ray_observatory For example, there's Ice Cube ( https://en.wikipedia.org/wiki/IceCube_Neutrino_Observatory https://en.wikipedia.org/wiki/IceCube_Neutrino_Observatory ) and a visualization of some of its results - https://youtu.be/2DDQYHIbL3Q https://youtu.be/2DDQYHIbL3Q and https://youtu.be/rSwbL2coz_Y https://youtu.be/rSwbL2coz_Y Another cosmic ray observatory - https://www.auger.org https://www.auger.org // https://en.wikipedia.org/wiki/Pierre_Auger_Observatory https://en.wikipedia.org/wiki/Pierre_Auger_Observatory > But since these high energy particles have an estimated arrival rate of just 1 per km2 per century, the Auger Observatory has created a detection area of 3,000 km2 (1,200 sq mi)—the size of Rhode Island, or Luxembourg—in order to record a large number of these events. It is located in the western Mendoza Province, Argentina, near the Andes. Pierre Auger is looking at air showers - https://en.wikipedia.org/wiki/Air_shower_(physics) https://en.wikipedia.org/wiki/Air_shower_(physics) --- I'd also suggest checking out PBS Space Time (in general) and in particular this episode - The Oh My God Particle - https://youtu.be/osvOr5wbkUw https://youtu.be/osvOr5wbkUw