A series of images constructed from observational data and mathematical modelling show the evolution of the black hole at the centre of the M87 galaxy from 2009 to 2017. Credit: Event Horizon Telescope Collaboration; gif compiled by Nature .
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"Because the flow of matter falling onto a black hole is turbulent, we can see that the ring wobbles with time," says lead author Maciek Wielgus, a radio astronomer at Harvard University in Cambridge, Massachusetts.
Many things are taking place:
Insight-HXMT discovers closest high-speed jet to black hole
Low-frequency QPOs, discovered in the 1980s, are a common observational timing feature in transient black hole binaries. They are quasi-periodic, but not precisely periodic, modulations in light curves. For more than 30 years, the origin of low-frequency QPOs was not understood.
Before the era of Insight-HXMT, X-ray satellites could only detect and study low-frequency QPOs below 30 keV; thus, it was difficult to test these models. Insight-HXMT, in contrast, has a wide effective energy range of 1-250 keV and has the largest effective area above 30 keV. Therefore, after Insight-HXMT was launched, scientists expected it would detect rich low-frequency QPOs above 30 keV, and thus be able to fully test previous models.
Cosmic X-Rays Reveal a Distinctive Signature of Black Hole Event Horizons
The graph shows measured values of two source properties – electron temperature and Comptonization parameter – from many X-ray observations of about two dozens of black holes and neutron stars. It is clearly seen that the black hole (red symbols) and the neutron star (blue symbols) are almost entirely separated in an unprecedented manner, thus identifying the black holes indubitably. Credit: Srimanta Banerjee, Sudip Bhattacharyya, Marat Gilfanov
A black hole is an exotic cosmic object without a hard surface predicted by Einstein’s theory of General Relativity. Although it does not have a surface, it is confined within an invisible boundary, called an event horizon, from within which nothing, not even light, can escape. Definitive proof of the existence of such objects is a holy grail of modern physics and astronomy.
Astrophysicists found distinctive signatures of a black hole event horizon - Tech Explorist
A black hole is an exotic cosmic object without a hard surface. It is confined within an invisible boundary, called an event horizon, from within which nothing, not even light, can escape.
Complete confirmation of the presence of such objects is a sacred goal of modern physics and astronomy. Only one supermassive black hole – with the mass more than 6 billion times the mass of the Sun – has so far been imaged using the surrounding radiation in radio wavelengths. But stellar-mass black holes – with masses of about ten times the mass of the Sun – should bend the spacetime around them at least ten thousand trillion times more than such a supermassive black hole does.
Many things are taking place:
A new spin on supermassive black holes | YaleNews
New observational research suggests that supermassive black holes — the mysterious, light-swallowing objects at the heart of nearly all large galaxies — are spinning like crazy.
It's a finding that has sweeping implications for how black holes form, how they grow, and how the shape of the universe as we know it came into being. The research appears in a new study accepted for publication in the Astrophysical Journal.
" This isn't the final word on black hole growth, but it's a big step forward," said the study's first author, Tonima Ananna, a former Yale graduate student who is now a postdoctoral researcher at Dartmouth College. Her doctoral adviser was Meg Urry , Yale's Israel Munson Professor of Physics and Astronomy and senior author of the study.
How to calculate the power of a black hole collision | Boing Boing
Being a huge astrophysics enthusiast, I just built a Black Hole Collision Calculator that explains the after-effects of a star (or any astronomical object) being eaten by a massive black hole.
It's a tool that computes the amount of energy released and how every collision expands the size of the event horizon. Did you know? If the 'Sun' was swallowed up by this black hole it'll produce 10,725,744,303,045,181,715,760,000,000,000,000,000,000
Megajoules of energy waves that would ripple through the whole Universe? (That's 27,903,988 quintillion years of Earth's total energy consumption).
Researchers discover high-speed jet closest to black hole - Xinhua | English.news.cn
BEIJING, Sept. 23 (Xinhua) -- Using China's Hard X-ray Modulation Telescope, dubbed Insight-HXMT, researchers have discovered that the low-frequency quasi-periodic oscillations (LFQPOs) above 200 keV in a new black hole originated from the precession of a closest relativistic jet to the black hole.
Researchers at the Institute of High Energy Physics under the Chinese Academy of Sciences cooperated with researchers from universities and institutes in China, Britain and Germany and reported the discovery which was published in the journal Nature Astronomy.
An incredibly large black hole was just spotted by scientists - Esquire Middle East
Generally, black holes come in two different categories; big and super big. Most black holes have a mass of around five times our solar system's sun. However, every now and again a black hole is spotted which is far, far bigger.
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It was spotted by the Laser Interferometry Gravitational Wave Observatory Scientific Collaboration and the Virgo Cooperation, the worldwide team astronomers directly observed the gravitational waves of an intermediate-mass great void, with a mass 142 times the mass of our very own Sunlight. That's big.
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