A strange X-ray glow seen in the sky three and a half years after an epic collision between two neutron stars is a first for science.
Because this was an entirely new observation, astronomers continued to watch the region of the sky where it occurred, around 132 million light-years from the Solar System.
, brightening to a peak 160-days post-merger. Then, the glow rapidly faded. This was interpreted as a relativistic jet., a steady light persisting in the darkness of space."The fact that the X-rays stopped fading quickly was our best evidence yet that something in addition to a jet is being detected in X-rays in this source,""A completely different source of X-rays appears to be needed to explain what we're seeing.
Either scenario – a kilonova shock wave or material falling onto a black hole newly formed in a neutron star merger – would be a first.
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