Tag: Black Holes

Using 16 years of data from NASA’s gamma-ray detecting Fermi spacecraft, astronomers have discovered that “microquasars,” systems in which a black hole is slowly devouring a star, may be small, but they pack one heck of a punch. Despite their diminutive nature, this research suggests even microquasars snacking on small stars can have an impressive cosmic influence, becoming powerful natural particle accelerators. This means black holes indulging in stellar meals of all sizes could be responsible for a higher-than-suspected amount of high-energy charged particles called “cosmic rays,” which are constantly…

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Astronomers have discovered hundreds of hidden supermassive black holes lurking in the universe — and there may be billions or even trillions more out there that we still haven’t found. The researchers identified these giant black holes by peering through clouds of dust and gas in infrared light. The finds could help astronomers refine their theories of how galaxies evolve, the researchers say. Hunting for black holes is difficult work. They are the darkest objects in the universe, as not even light can escape their gravitational pull. Scientists can sometimes…

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Anyone who has experienced the blistering pain associated with biting into a fresh apple pastry or taking a swig of hot coffee can attest to the importance of blowing on your food or drink before introducing it to your mouth. It turns out that black holes may perform the cosmic equivalent of this routine, “blowing” on blistering hot matter before they gobble it down. This supermassive black hole-food cooling process was discovered by astronomers using NASA’s Chandra X-ray telescope and the Very Large Telescope (VLT) to observe some of the…

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Using the James Webb Space Telescope (JWST), astronomers have discovered distant, overly massive supermassive black holes in the early universe. The black holes seem way too massive compared to the mass of the stars in the galaxies that host them. In the modern universe, for galaxies close to our own Milky Way, supermassive black holes tend to have masses equal to around 0.01% of the stellar mass of their host galaxy. Thus, for every 10,000 solar masses attributed to stars in a galaxy, there is around one solar mass of…

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Researchers in South Korea are developing a constellation of satellites that could reveal what goes on in the vicinity of supermassive black holes like never before. The constellation, dubbed Capella, is a brainchild of Seoul National University astronomy professor Sascha Trippe. An expert in black holes, Trippe has grown frustrated with the limitations of humanity’s existing instruments for observing black holes and concerned that unless major technological advances are made, research may soon reach a “dead end.” When the first-ever image of a supermassive black hole — the one at…

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Nothing is supposed to escape a black hole’s event horizon — yet new research suggests it may secretly leak information. That leakage would appear in subtle signatures in gravitational waves, and now we know how to look for them, the study authors say. In 1976, Stephen Hawking rocked the astrophysics world with his discovery that black holes aren’t entirely black. Instead, they emit tiny amounts of radiation and, given enough time, can give off so much that they disappear entirely. But this introduced a massive problem. Information flows into black…

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Astronomers have discovered the first binary stars orbiting a supermassive black hole. The stellar pairing in question orbits the cosmic titan at the heart of the Milky Way, Sagittarius A*. The binary stars, designated D9, were found in data collected by the Very Large Telescope (VLT), located atop Cerro Paranal, an 8,645-foot-tall (2,635-meter) mountain in Chile’s Atacama Desert. By measuring their velocity, the team behind the discovery was surprised to find they were two stars, not one. The fact that these binary stars so near Sgr A* have survived the…

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