Neutrinos: Messengers from a Violent Universe
Δημοσιεύτηκε στις 19 Ιαν 2017
In
this 45-minute presentation Alex Himmel, Wilson Fellow at Fermi
National Accelerator Laboratory, explains how neutrinos might provide
the answers to many questions that scientists have about the universe.
The neutrino is a type of subatomic particle. They are produced in
copious quantities by celestial objects -- trillions of neutrinos from
the sun will pass through your body while you read this sentence -- but
they interact so rarely with other particles that only a handful will
strike an atom in your body during your entire life. Yet these benign
little particles can tell us about some of the most energetic processes
in the universe. In order to detect these elusive particles, scientists
build enormous particle detectors deep underground, using tanks full of
liquid argon in an old gold mine as well as a cubic kilometer of
Antarctic ice. In this talk Himmel works his way from the sun to
galactic supernovae to the possible extragalactic sources of the
highest-energy neutrinos ever observed. Himmel also answers audience
questions from members of the Naperville Astronomical Association.
this 45-minute presentation Alex Himmel, Wilson Fellow at Fermi
National Accelerator Laboratory, explains how neutrinos might provide
the answers to many questions that scientists have about the universe.
The neutrino is a type of subatomic particle. They are produced in
copious quantities by celestial objects -- trillions of neutrinos from
the sun will pass through your body while you read this sentence -- but
they interact so rarely with other particles that only a handful will
strike an atom in your body during your entire life. Yet these benign
little particles can tell us about some of the most energetic processes
in the universe. In order to detect these elusive particles, scientists
build enormous particle detectors deep underground, using tanks full of
liquid argon in an old gold mine as well as a cubic kilometer of
Antarctic ice. In this talk Himmel works his way from the sun to
galactic supernovae to the possible extragalactic sources of the
highest-energy neutrinos ever observed. Himmel also answers audience
questions from members of the Naperville Astronomical Association.
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