24 October 2018
New constellations for Fermi's 10th birthday
... Maryland. “One way or another, all of the gamma-ray constellations have a tie-in to Fermi science.” Among the assortment...a further 2000 sources to the collection. These additional gamma-ray sources could one day end up as another set of ...
18 January 2017
The unusual tails of a pulsar give a clue as to what type of pulse it generates
...emission signatures of these objects. By using NASA's Chandra X-ray Observatory, astronomers observed the pulsar wind nebulae (PWN) ...we detect the bright radio pulses while most of the gamma-ray emission is directed in the plane of the sky and misses ...
17 November 2017
Excess positrons immersing Earth have unknown origin
... such as potassium-40, however they are also found in cosmic rays, and astronomers have long been intrigued by why there are ...from. One of which is the High-Altitude Water Cherenkov Gamma-Ray Observatory (HAWC) detector in Mexico. As the name implies ...
12 July 2016
Did two ancient supernovas cause cell mutation and climate change on Earth?
...by muons – an unstable subatomic particle of the same class as an electron – at ground level on Earth. This boosted exposure to cosmic rays would be equivalent to one CT scan per year for every creature inhabiting land or shallower parts of the ocean...
10 October 2016
Risk of chronic dementia for astronauts heading to Mars
... but now the risk of chronic dementia from galactic cosmic ray exposure could face astronomers on a long-haul trip to ...not face the same level of bombardment with galactic cosmic rays because they are still within the Earth's protective magnetosphere...
11 October 2016
GRB afterglow observed by ALMA for the first time
.../Submillimetre Array (ALMA) to study the afterglow of a gamma-ray burst (GRB) – an event classed as one of the ... that GRB events are characterised by a short flash of gamma-ray photons followed by a long lasting afterglow that can be observed...
