Travelling 650 million light-years, a mysterious signal possibly from a star corpse has reached Earth
Travelling 650 million light-years, a mysterious signal possibly from a star corpse has reached Earth
Scientists at a leading gravitational wave observatory detected a mysterious signal with chilling origins. As per reports, the signal has its origins in the collision between a star corpse and an unknown object.
Star corpse?
Yes, star corpse, or better known as the stellar remnant of a neuron star. It is what's left when a massive star collapses, leaving behind only a dense core.
One of the densest objects in the universe, Neutron stars are less dense than black holes, which have gravity so strong that even light cannot escape.
The signal, which was named GW230529_181500, as per Gizmodo, travelled 650 million light-years to reach Earth. It was picked up by the LIGO-Virgo-KAGRA Collaboration, a network of observatories, last year. This was, in May 2023, just after it resumed its operations following upgrades to improve sensitivity.
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While researchers have identified one object in the collision as likely being a neutron star, the other much object was more massive than any known neutron star, suggesting it could be a small black hole. However, the team will further scrutinise the collision to find out what it exactly is.
This unknown object fills the "mass gap" between the heaviest neutron stars and the lightest black holes. A paper describing the findings has been posted on the LIGO website.
In a release Jess McIver, an astronomer at the University of British Columbia and Deputy Spokesperson of the LIGO Scientific Collaboration said that the detection "reveals that there may be a higher rate of similar collisions between neutron stars and low-mass black holes than we previously thought."
As per the report, only one other merger involving an object in this mass range has been observed before, known as GW190814.
There's a lot to look forward to. The LIGO-Virgo-KAGRA Collaboration is preparing for its fourth observing run, scheduled to start on April 10, 2023, and run until February 2025. During this time, they expect to observe more than 200 gravitational wave signals.
(With inputs from agencies)
