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For the first time, scientists see black holes swallowing neutron stars

Text Size: A+ New Delhi: In a first, an international team of scientists, including researchers from India, have confirmed the detection of a collision between a black hole and a neutron star, by analysing the gravitational waves created by two such events in January last year. Gravitational waves are ripples in the space-time fabric created by extreme events, such as the collision of two blackholes or two neutron stars. While gravitational waves from several such collisions have been detected since the first discovery in 2015, they have all been a result of collision between similar cosmic bodies. However, now the team has determined that these waves detected last January were a result of a neutron star being swallowed whole by its black hole partner.

Astronomers detect black holes swallowing up neutron stars for the first time

Astronomers detect black holes swallowing up neutron stars for the first time CNET 2 hrs ago © Carl Knox, OzGrav/Swinburne Astronomers have detected two neutron star-black hole mergers via gravitational waves the first time such a discovery has been made. On Jan. 5, 2020, astrophysicists heard a chirp from a distant part of the cosmos, some 900 million light-years away. The fleeting sound was unlike any they d heard before and was caused by a great ripple in space-time a gravitational wave that spread out across the universe from over 900 million light-years away, washing over the Earth and pinging detectors. Chirp.  Then, 10 days later, they heard another, similar sound. A cosmic twin. Gravitational waves had once again pinged Earth s detectors. 

Hanford observatory records collision between black hole, neutron star

(Carl Knox/OzGrav/Swinburne University Australia via AP) This illustration provided by Carl Knox depicts a black hole, center, swallowing a neutron star, upper left. The blue lines are gravitational waves, ripples in time and space, which is how astronomers detected the merger, and orange and red areas indicate parts of the neutron star being stripped away. In a report released on Tuesday, June 29, 2021, astronomers say they have witnessed a black hole swallowing a neutron star, the most dense object in the universe, all in a split-second gulp. HANFORD, Wash. Stargazers have observed space above us for centuries, but never before have scientists confirmed a collision between a black hole and a neutron star. That changed recently when the Laser Interferometer Gravitational-Wave Observatory (LIGO) in Hanford and its twin observatory in Livingston, Louisiana detected two of these instances in January 2020.

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