details how the discovery constitutes the first-ever confirmation of what they call a merger-triggered supernova., was part of a team led by Hallinan, tasked with searching for short bursts of radio waves, also known as radio transients — as these are often signals for unusual astronomical events. Searching through data from
the Very Large Array Sky Survey, Dong brought a particularly strong radio transient, called VT 1210+4956, to the attention of the team. After more analysis, Dong and the team discovered that, even more unusually, X-rays listed in a separate survey were being emitted by the same event.Dong explains that the Caltech team he is a part of set out to study the VLA Sky Survey with specific goals, while also keeping an open mind.
The team speculated that a leftover remnant of a star that had previously exploded — either a black hole or a neutron star — had been orbiting near another star. The black hole gradually siphoned away the atmosphere of the nearby star, ejecting it into space and forming the torus of gas. Gradually, the stars were dragged closer together until the black hole plunged into the star, causing the star to collapse and form a supernova.
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