Experiment provides indications of an extragalactic component of cosmic rays
The KASCADE-Grande measurement field on the premises of KIT was used
by scientists to study particle showers produced by cosmic rays.
Credit: KIT
Read more at: http://phys.org/news/2013-06-indications-extragalactic-component-cosmic-rays.html#jCp
The KASCADE-Grande measurement field on the premises of KIT was used
by scientists to study particle showers produced by cosmic rays.
Credit: KIT
Read more at: http://phys.org/news/2013-06-indications-extragalactic-component-cosmic-rays.html#jCp
The KASCADE-Grande measurement field on the premises of KIT was used
by scientists to study particle showers produced by cosmic rays.
Credit: KIT
Read more at: http://phys.org/news/2013-06-indications-extragalactic-component-cosmic-rays.html#jCp
The KASCADE-Grande measurement field on the premises of KIT was used
by scientists to study particle showers produced by cosmic rays.
Credit: KIT
The KASCADE-Grande measurement field on the premises of KIT was used by
scientists to study particle showers produced by cosmic rays. Credit:
KITRead more at: http://phys.org/news/2013-06-indications-extragalactic-component-cosmic-rays.html#jCp
It is obvious from the data of the KASCADE-Grande experiment at the
Karlsruhe Institute of Technology (KIT) that the so-called "knee" of
the cosmic rays, a bend in the energy spectrum at high energies, is
located at different energies for light and heavy particles. As
regards light particles, the scientists have now found that the
energy spectrum flattens again beyond the knee and forms a type of
"ankle". This structure indicates that cosmic radiation particles
with energies beyond the knee are accelerated in galaxies other than
the Milky Way.
It is obvious from the data of the KASCADE-Grande experiment at the
Karlsruhe Institute of Technology (KIT) that the so-called "knee" of the
cosmic rays, a bend in the energy spectrum at high energies, is located
at different energies for light and heavy particles. As regards light
particles, the scientists have now found that the energy spectrum
flattens again beyond the knee and forms a type of "ankle". This
structure indicates that cosmic radiation particles with energies beyond
the knee are accelerated in galaxies other than the Milky Way. Read more
at:
http://phys.org/news/2013-06-indications-extragalactic-component-cosmic-rays.html#jCpRead more at: http://phys.org/news/2013-06-indications-extragalactic-component-cosmic-rays.html#jCp KIT's KASCADE-Grande experiment has yielded the important result that a characteristic bend in the energy spectrum of high-energy cosmic rays, also called "knee", is located at different energies for light and heavy primary particles. The position of the knee appears to vary with the charge of atomic nuclei: KASCADE-Grande detected the "iron knee" at an energy that was 26 times higher than the knee in the spectrum of hydrogen nuclei. Latest findings of the KASCADE-Grande experiment reveal a flattening (also called "anti-knee" or "ankle") of the spectrum of light primary particles above an energy of 1017 electron volts. This structure indicates the existence of a new, now extragalactic component of cosmic rays. This important result in high-energy astrophysics was published recently by the scientists in the Physical Review D journal.
|