A Black Hole can Tear a Neutron Star Apart in Less Than 2 Seconds universetoday storybywill
“We get insights into a process that lasts one to two seconds – that sounds short, but in fact a lot happens during that time: from the final orbits and the disruption of the neutron star by the tidal forces, the ejection of matter, to the formation of an accretion disk around the nascent black hole, and further ejection of matter in a jet. This high-energy jet is probably also a reason for short gamma-ray bursts, whose origin is still mysterious.
In the end, their simulations showed that during the merger process, the neutron star is torn apart by tidal forces in a matter of seconds. About 80% of the neutron star’s matter was consumed by the black hole in the first few milliseconds, increasing the black hole’s mass by an additional solar mass.
“Such general relativistic simulations are very time-consuming. That’s why research groups around the world have so far focused only on short simulations. In contrast, an end-to-end simulation, such as the one we have now performed for the first time, provides a self-consistent picture of the entire process for given binary initial conditions that are defined once at the beginning.”
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