Satellite fails to find previously reported X-rays from galaxy cluster
R. Jay GaBany
Before the demise of Japan’s latest X-ray satellite, Hitomi, the probe might have put to rest speculation about radiation from dark matter in a cache of galaxies.
In 2014 astronomers reported that several galaxy clusters appeared to inexplicably produce X-ray photons with energies of about 3.5 kiloelectron volts. The researchers suggested that the radiation could be coming from the decay of sterile neutrinos — hypothetical particles that are one candidate for the elusive dark matter that is thought to bind galaxies and clusters together.
Before the Hitomi X-ray satellite (aka ASTRO-H) failed on March 26, it got a look at the