Did a gamma-ray burst initiate the late Ordovician mass extinction?Who discovered gamma rays?What are gamma delta T-cells?What is the difference between alpha, beta, and gamma decay?How does electron capture release gamma rays?What is gamma in an adiabatic process?How are gamma rays produced ...
Very high energy gamma rays probe the most extreme high energy particle populations in the burst environment, testing models of lepton and proton acceleration in GRBs and constraining the bulk Lorentz factor and opacity of the outflow. Sensitivity improvements of more than an order of magnitude in...
Brightest ever gamma-ray burst to date The brightest gamma-ray burst ever seen as observed by the Swift X-Ray Telescope around an hour after it erupted.(Image credit: NASA/Swift/A. Beardmore (University of Leicester)) One of the most remarkable GRBs observed to date is known as the "bri...
Gamma rays are a form of electromagnetic radiation, as are radio waves, infrared radiation, ultraviolet radiation, X-rays and microwaves. Gamma rays can be used to treat cancer, and gamma-ray bursts are studied by astronomers. Electromagnetic (EM) radiation is transmitted in waves or particles a...
What is a gamma ray burst? What is the half-life of uranium? What nuclide decays by neutron emission to form helium-4? What is stellar energy in nuclear chemistry? What is the carrier particle of the weak nuclear force? What is the penetrating power of an alpha particle?
Gamma-ray bursts reveal largest structure in the universe is bigger and closer to Earth than we knew: 'The jury is still out on what it all means.' We'll address those ambiguities later. For the time being, when we think about shape, we're referring to the geometry of space. For exa...
Both types of long and short gamma ray bursts involve a stage of a hyper-Eddington accretion of hot and dense plasma torus onto a newly born black hole. The prompt gamma ray emission originates in jets at some distance from this 'central engine' and in most events is rapidly variable, ha...
Characteristics of thunderstorms that produce terrestrial gamma ray flashes: NEXRAD-enhanced echo-top data show that 24 terrestrial gamma ray flashes (TGF) detected with the Fermi Gamma Ray Burst Monitor (GBM) are consistently adjacent to high-altitude regions of storms ...
tance is a factor ∼ 100 larger than that expected (eg. Piran 2005) for internal shocks. The very steep decline of gamma-ray and optical flux at the end of the burst suggests that the source turned-off quickly. The flux decline cannot be faster than the limit pro- ...
When a gamma ray strikes living tissue, it knocks loose electrons from the molecules we use to reproduce our DNA. This is why gamma rays are...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough ...