Lead researcher and Curtin research fellow Dr Paul Hancock said that after studying an ultra-sensitive image of gamma-ray
bursts with no afterglow, we can now say the theory was incorrect and our telescopes have not failed us.
bursts are the most luminous explosions in the cosmos, thought to be triggered when the core of a massive star runs out of nuclear fuel, collapses under its own weight, and forms a black hole.
Near the tops of the storms, for the types of terrestrial gamma-ray
flashes that can be seen from space, the radiation doses are equivalent to about 10 chest x-rays, or about the same radiation people would receive from natural background sources over the course of a year.
All in all, researchers will have a spacecraft capable of recording gamma-ray
radiation over an energy range spanning seven orders of magnitude.
Now we can work to better understand how they manage this feat and determine if the process is common to all remnants where we see gamma-ray
emission," said lead researcher Stefan Funk, an astrophysicist with the Kavli Institute for Particle Astrophysics and Cosmology at Stanford University in Calif.
emission originated about 70 light-years away from the galaxy's central black hole.
bursts in our Milky Way galaxy are indeed rare, but the scientists estimate that at least one nearby likely hit the Earth in the past billion years.
Kevork Abazajian, assistant professor, and Manoj Kaplinghat, associate professor, of the Department of Physics and Astronomy analyzed data collected between August 2008 and June 2012 from NASA's Fermi Gamma-ray
Space Telescope orbiting Earth.
These observations offer the first direct connection between gamma-ray
bursts and another class of objects," the team reports.
German time zone) on 26 July 2012, detecting its very first images of atmospheric particle cascades generated by cosmic gamma rays and by cosmic rays, marking the next big step in exploring the southern sky at gamma-ray
Until that measurement is done, most astronomers still favor the presence of a black hole at the galactic center as the explanation for the gamma-rays
Washington, Feb 17 (ANI): New images from NASA's Fermi Gamma-ray
Space Telescope are helping astronomers take a step closer to understanding the source of cosmic rays, which are some of the universe's most energetic particles.