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How Astronomers Track Black Hole Mergers Over Cosmic Time

Gravitational wave astronomers are on the difficult hunt for rare mergers of stellar mass black holes. But they are not easy to detect.

"Dark Hearts of the Cosmos" --Dazzling New Mergers of Black Holes and Neutron Stars

Gravitational Waves Reveal First-Ever Neutron Star and Black Hole Pair

Gravitational Waves Reveal First-Ever Neutron Star and Black Hole Pair Twitter Share Good news, everyone! There’s now been another big show of how gravitational waves can be used to discover novel features of the universe. Astronomers at LIGO and its sister facilities say they have the first-ever direct evidence of black hole-neutron star binary systems. The scientists at the gravitational wave observatories say these findings represent “a completely new kind” of system. Previously, only pairs of black holes or pairs of neutron stars were responsible for all the other gravitational waves scientists have detected. Science News reported on the detection of the binary systems, which came on January 5, 2020. On that day, the LIGO Detector in Louisiana and the Advanced Virgo detector in Italy picked up on a series of gravitational waves—ones that astronomers now believe stemmed from the last few decaying orbits between a black hole and neutron star. After a thousand years of gravity binding the two together in a twirling, cosmic dance.

'Pac-Man' in space: Black holes gobble up neutron stars in first evidence of a rare celestial event

endIndex: (CNN) — Nearly a billion years ago, two of the most extreme objects in the universe came together in a death spiral, and one of them didn't make it out alive. For the first time ever, astronomers have detected two separate instances of black holes swallowing dense neutron stars -- and it played out like Pac-Man in space. The gravitational waves caused by these two events reached Earth in January 2020, allowing astronomers to retrace the ripples in space-time back to when they occurred in distant galaxies 900 million light-years and a billion light-years away. The study, involving more than a thousand scientists in these detections, published Tuesday in The Astrophysical Journal Letters.

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.

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.

Scientists detect black hole-neutron star merger for the first time

The Weather Network - Spacetime ripples reveal black holes gobbling up their neutron star companions

Black Hole eats Neutron Star, gravitational waves from collision hit Earth

Scientists catch 1st glimpse of a black hole swallowing a neutron star