Public Lecture | Supernovas: Gravity-powered Neutrino Bombs
Δημοσιεύτηκε στις 1 Φεβ 2016
Imagine
taking a ball of hot plasma more massive than the sun and suddenly
compressing it to a super-dense object the size of a city. This sounds
like science fiction, yet it is exactly what happens in the centers of
massive stars, causing them to explode so violently that they briefly
release as much light as an entire galaxy. These supernova explosions
have shaped the universe as we know it and created many of the chemical
elements around us. It turns out that tiny, elusive elementary particles
called neutrinos play a crucial role in these explosions. Only two
dozen supernova neutrinos have ever been detected, but thousand more are
expected to be seen in giant underground detectors of the future. This
lecture describes the part neutrinos play in one of the universe’s most
dramatic events, and outline what scientists expect to learn by
capturing bursts of neutrinos from the next galactic supernova.
About the Speaker:
Alex
Friedland studied physics first at the Moscow Institute of Physics and
Technology and later as a graduate student at the University of
California, Berkeley. He became fascinated with neutrinos from supernova
explosions while a postdoctoral researcher at the Institute for
Advanced Study in Princeton, NJ. He continued exploring the rich physics
of supernova neutrinos at Los Alamos National Laboratory, first as a
Richard P. Feynman Fellow and then as a permanent staff scientist. In
2015 Friedland became a senior staff scientist at SLAC, where he
explores neutrinos in the lab, in stars and in the early universe and
pursues broader questions in particle physics and astrophysics.
taking a ball of hot plasma more massive than the sun and suddenly
compressing it to a super-dense object the size of a city. This sounds
like science fiction, yet it is exactly what happens in the centers of
massive stars, causing them to explode so violently that they briefly
release as much light as an entire galaxy. These supernova explosions
have shaped the universe as we know it and created many of the chemical
elements around us. It turns out that tiny, elusive elementary particles
called neutrinos play a crucial role in these explosions. Only two
dozen supernova neutrinos have ever been detected, but thousand more are
expected to be seen in giant underground detectors of the future. This
lecture describes the part neutrinos play in one of the universe’s most
dramatic events, and outline what scientists expect to learn by
capturing bursts of neutrinos from the next galactic supernova.
About the Speaker:
Alex
Friedland studied physics first at the Moscow Institute of Physics and
Technology and later as a graduate student at the University of
California, Berkeley. He became fascinated with neutrinos from supernova
explosions while a postdoctoral researcher at the Institute for
Advanced Study in Princeton, NJ. He continued exploring the rich physics
of supernova neutrinos at Los Alamos National Laboratory, first as a
Richard P. Feynman Fellow and then as a permanent staff scientist. In
2015 Friedland became a senior staff scientist at SLAC, where he
explores neutrinos in the lab, in stars and in the early universe and
pursues broader questions in particle physics and astrophysics.
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