Crab Pulsar Beams Most Energetic Gamma Rays Ever Detected from a Pulsar
Astrophysicists have detected pulsed gamma-ray emission from the Crab pulsar at energies far beyond what current theoretical models of pulsars can explain.
With energies exceeding 100 billion electron-volts (100 GeV), the surprising gamma-ray pulses were detected by the VERITAS telescope array at the Whipple Observatory in Arizona and reported by an international team of scientists in a paper in the October 7 issue of Science. Corresponding author Nepomuk Otte, a postdoctoral researcher at the University of California, Santa Cruz, said that some researchers had told him he was crazy to even look for pulsar emission in this energy realm.
"It turns out that being persistent and stubborn helps," Otte said. "These results put new constraints on the mechanism for how the gamma-ray emission is generated."
Otte, Andrew McCann of McGill University in Montreal, and Martin Schroedter of the Smithsonian Astrophysical Observatory performed most of the analytic work for the study, which involved nearly 100 scientists in the VERITAS collaboration. VERITAS spokesperson Rene Ong, professor of physics and astronomy at UCLA, credited Otte as the leading advocate for using the powerful gamma-ray observatory to study the Crab pulsar.
"To me it's a real triumph of the experimental approach, not going along with the flow and making assumptions, but just observing to see what there is. And lo and behold, we see something different than what everybody expected," Ong said.
Lees verder: http://www.scienceda...11006141358.htm
Bron: University of California - Santa Cruz
Crab pulsar beams most energetic gamma rays ever detected from a pulsar
Dit forum kan gratis blijven vanwege banners als deze. Door te registeren zal de onderstaande banner overigens verdwijnen.
0 gebruiker(s) lezen dit onderwerp
0 leden, 0 bezoekers, 0 anonieme gebruikers
Ook adverteren op onze website? Lees hier meer!
- Hier ook uw vacature? 06-14
- vraag over de water constante 18-01 5
- concentratie zuur in afvalstroom 18-01 6
- Verbanden tussen molaire abso... 18-01 2
- Systeembord elektronisch code... 18-01 3
- Meer sterren in een sterrenst... 18-01 3
- Recursiviteit van de observab... 18-01 2
- Computer klopt mens in leestest 18-01
- continuÔteit 18-01 7
- Ionen transport Polyetheen 18-01
- verhouding dikte-draagkracht... 18-01 1