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#auger

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Daniel Pomarède

A fly through of the Auger Observatory

Located on the vast plain known as the Pampa Amarilla (yellow prairie) in western Argentina, this hybrid detector employs independent methods to detect and study the highest-energy cosmic rays.

Its 1,660 water surface detector tanks, separated from each of its neighbors by 1.5 kilometers, cover about 3,000 km2 of the Pampa.

youtube.com/watch?v=wnlx8goqaI

YouTubeAuger desde el aire/Auger from Above/By Observatorio Pierre Auger
#cosmicrays#auger#observatory
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guyinahat

By the way the #garden #auger idea is a terrible idea. Don't do it! Specially if you are an older person. They seem to peddle these things to elder people who want to have a garden. Today I tried this for digging and the 2" bit caught a root. It almost ripped my two hands off. My drill is pretty strong. So then I tried using the screw clutch function and unfortunately, on the strongest setting it won't drill dirt very well. So better to get a real auger with large handles and a 2x4 as lever

Public
Daniel Pomarède

New study by Teresa Bister and Glennys Farrar on the anisotropies in the ultra high energy cosmic rays arrival directions, using the 3D source density calculated from galaxies' peculiar velocities.
arxiv.org/abs/2308.10678

arXiv.orgAnisotropies, large and smallWe report on several new results using anisotropies of UHECRs. We improve and extend the work of Ding, Globus and Farrar, who modeled the UHECR dipole assuming sources follow the dark matter distribution, accounting for deflections in the Galactic and extragalactic magnetic fields but using a simplified treatment of interactions during propagation. The work presented here employs an accurate and self-consistent treatment of the evolution of composition during propagation, allows for and explores the impact of "bias" in the relation between UHECR sources and the dark matter distribution, and investigates the possible generation of arrival-direction-dependent composition anisotropies. Limits on the source number density consistent with the observed anisotropies are derived for the case where UHECR sources follow the dark matter distribution, and compared to a homogeneous source distribution case.
#universe#astronomy#astrophysics
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