A visualization of a collision between two differently sized black holes. Credit: N. Fischer, H. Pfeiffer, A. Buonanno (Max Planck Institute for Gravitational Physics), Simulating eXtreme Spacetimes (SXS) Collaboration
Gravitational-wave astronomers have for the first time detected a collision between two black holes of substantially different masses — opening up a new vista on astrophysics and on the physics of gravity. The event offers the first unmistakable evidence from these faint space-time ripples that at least one black hole was spinning before merging, giving astronomers rare insight into a key property of these these dark objects.
In case you are keeping track:
1 year after epic black hole photo, Event Horizon Telescope team is dreaming very big | Space
In April 2019, the EHT collaboration revealed the first-ever image of a black hole , which captured the behemoth at the heart of the galaxy M87. The project had been working for that moment for two decades, but the unveiling did not mark a climax or a culmination. Rather, it was a turning point, the opening of a window onto even more exciting discoveries to come, team members said.
"We'll be looking back on this 20 years from now — you know, we'll all be drinking umbrella drinks somewhere — and I think we'll recognize the M87 image as just the beginning," EHT founding director Shep Doeleman, an astronomer at the Harvard-Smithsonian Center for Astrophysics (CfA) in Massachusetts, told reporters on April 10 during a webcast event celebrating the one-year anniversary of the photo's unveiling.
Black hole collision, funding disruption and Mars rocks
A visualization of a collision between two differently sized black holes. Credit: N. Fischer, H. Pfeiffer, A. Buonanno (Max Planck Institute for Gravitational Physics), Simulating eXtreme Spacetimes (SXS) Collaboration
"It's an exceptional event," said Maya Fishbach, an astrophysicist at the University of Chicago in Illinois, who unveiled the signal at a virtual meeting of the American Physical Society on 18 April. The US-based Laser Interferometer Gravitational-Wave Observatory (LIGO) and the Virgo observatory near Pisa, Italy, detected the collision last year.
Woster: Brushing up on black hole knowledge | The Daily Republic
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Massive black hole collides with much smaller one, creates unique space event
Bengaluru: Astrophysicists have detected gravitational waves from an unusual merger of two asymmetric black holes, i.e., black holes with two different masses.
According to gravitational wave data from the Laser Interferometer Gravitational-Wave Observatory (LIGO) in the US and the Virgo interferometer in Italy, the two black holes had an unusually large mass difference, with one being three to four times more massive than the other.
Because of this mass imbalance, the merger produced gravitational waves that spread out in the space-time fabric in multiple frequencies.
Astronomers Detected a Black Hole Merger With Very Different Mass Objects - Universe Today
In another first, scientists at the LIGO and Virgo gravitational wave detectors announced a signal unlike anything they’ve ever seen before. Whereas many black hole mergers have been detected thanks to LIGO and Virgo’s international network for detectors, this particular signal (GW190412) was the first where the two black holes had distinctly different masses.
The event was observed by both LIGO and Virgo on April 12th, 2019, early in the detectors' third observation run (O3). According to the study that describes the find, which recently appeared online and the LIGO website , GW190412 took place about 1.9 to 2.9 billion light-years from Earth. It involved the merger of two black holes weighting approximately 8 and 30 Solar masses, respectively.
Black Hole Collision Is Unlike Anything We've Ever Seen Before - UNILAD
For what is thought to be the first time ever, scientists have detected two black holes of different masses colliding.
Researchers detected the first ever gravitational-wave event in 2015, and nearly all collisions observed since have involved black holes of nearly equal masses.
Last Spring, scientists from the Laser Interferometer Gravitational-Wave Observatory (LIGO) and the European Gravitational Observatory (EGO) began the third observing run (O3) of the observatories to offer further insight into the late inspiral and merger phase of binary black hole (BBH) systems.
Coronavirus crisis exposes black hole in Cricket Australia's finances | Sam Perry | Sport | The
While those wanting to comprehend the subsequent figures might be wishing they'd pursued a finance degree, you don't need to be a PwC graduate to justifiably wonder how both cricket, and its rival codes, are in such bad shape. How does Australia, which after Switzerland is the second-wealthiest nation in the world per-capita, find three, possibly four, of its most popular codes in dire straits mere weeks into the shutdown?
Of course, nobody saw the pandemic coming, especially in its speed and scale. But put crudely, Cricket Australia's poor overarching cash position has been worryingly exposed, now that the music's stopped. As Warren Buffett put it, "only when the tide goes out do you discover who's been swimming naked".
Happening on Twitter
This black-hole collision just made gravitational waves even more interesting https://t.co/o7k8iR1xk6 https://t.co/nN13gZ5wzs sciam (from New York City) Wed Apr 22 02:30:06 +0000 2020
A big black hole had a much smaller companion. https://t.co/hj4y4x8rYF ScienceNews (from Washington, DC) Tue Apr 21 17:30:00 +0000 2020
Yep, Einstein's theory checks out. https://t.co/IskngET5v2 ScienceNews (from Washington, DC) Wed Apr 22 01:45:00 +0000 2020
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