Fermi


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Fermi

A unit of length equivalent to one-one quadrillionth of one meter.
References in periodicals archive ?
Those from Centaurus A, for example, may stretch 10 times longer than the Fermi bubbles, with strong evidence for shock waves and photons being kicked up to high energies by speedy particles.
Mystery in the Milky Way: two gigantic bubbles ejected from our galaxy's center launched astronomers on a decade-long odyssey
In 1949, the Fermi telescope's namesake, physicist Enrico Fermi, suggested the highest-energy cosmic rays were accelerated in the magnetic fields of interstellar gas clouds.
Supernova Remnants Produce Cosmic Rays
With these results, Fermi has excluded more candidates, has shown that dark matter can contribute to only a small part of the gamma-ray background beyond our galaxy, the Milky Way, and has produced strong limits for dark matter particles in the second-largest galaxy orbiting it," she added.
WIMPs Or Axions? What Is Dark Matter Made Of?
With this new batch of pulsars, Fermi now has detected more than 100, which is an exciting milestone when you consider that, before Fermi's launch in 2008, only seven of them were known to emit gamma rays," said Pablo Saz Parkinson, an astrophysicist at the Santa Cruz Institute for Particle Physics at the University of California Santa Cruz, and a co-author on two papers detailing the findings.
NASA's Fermi Finds Youngest Millisecond Pulsar, 100 Pulsars To-Date
Had Fermi and VERITAS not found gammaray emissions from starburst galaxies, he notes, "it would have been back to the drawing board" for understanding the origin of cosmic rays.
Observations of starburst galaxies provide clue to cosmic ray origins: detection of gamma rays solidifies supernova explanation
Key words: band structure; dopants; electron density; Fermi energy; gallium antinomide; Raman measurements.
Dependence of electron density on Fermi energy in n-type gallium antimonide
Remarkably, LMC P3 is the most luminous such system known in gamma rays, X-rays, radio waves and visible light, and it's only the second one discovered with Fermi.
United States : NASA's Fermi Finds Record-breaking Binary in Galaxy Next Door
Now we have conclusive proof supernova remnants, long the prime suspects, really do accelerate cosmic rays to incredible speeds," said Elizabeth Hays, a member of the research team and Fermi deputy project scientist at NASA's Goddard Space Flight Center in Greenbelt, Md.
Supernova remnants really do produce cosmic rays
The bubbles seem to have sharp edges, perhaps marking expanding shock fronts from such an event, but the gamma-ray spectrum recorded by Fermi is again too "hard" (dominated by especially high-energy emission).
The Milky Way's giant gamma-ray bubbles
During two recent lightning storms, Fermi recorded gamma-ray emissions with an energy that could have been produced only by energetic positrons, the antimatter equivalent of electrons.
Sign of antimatter seen in lightning: gamma-ray flash energies indicate presence of positrons
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