a cosmic ray (CR) and a ultra high energy cosmic ray (UH do we know and what we would like to know about them? o we detect them? Auger public results and conclusions The Pierre Auger Observatory for the UHECR Federico Sanchez, Dip.Fisica e INFN sezione Milano
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● What a cosmic ray (CR) and a ultra high energy cosmic ray (UHECR) are?
● What do we know and what we would like to know about them?
● How do we detect them?
● First Auger public results and conclusions
The Pierre Auger Observatory for the UHECR
Federico Sanchez, Dip.Fisica e INFN sezione Milano
A cosmic ray is not a ray...
subatomic primaries (e, p, He, C, N, O , Fe)and secondaries particles (Li, Be, B)from our galaxy.
EAS regimeDirectobservationregime
? ? ?
Produced by diffusive shock acceleration in SNR (super novae remnants)
What:
How and where:
X particle
How far?
B intergalactic
B galactic
B halo
B source
CR
Relic
Nucleons
Nucleons
Gaucho
SD
FD
HYB
Spectrum
Conclusions:
● The Pierre Auger Observatory started regular data taking in January 2004 and released its firsts physics results in August 2005.
● The southern site construction will finish by the end of 2006.
● The northern site is in R&D phase.
Thank you,
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