Tag: Black Holes

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…

In 2018, it was revealed that a pioneering telescope the size of Earth had taken, for the first time, an image of a black hole. That same instrument, the Event Horizon Telescope (EHT), has now witnessed the same black hole erupt with a powerful and unexpected explosion. Scientists hope that by studying this emission, they can better model the structure surrounding supermassive black holes. The flare, which lasted for about three days in April and May 2018, erupted from the supermassive black hole designated M87*, which liesat the heart of…

Astronomers have stumbled upon a pair of massive black holes in a distant galaxy that are triggering unusual bursts of light. These bright emissions, which appear to peak on a regular cycle, may be caused by the black hole duo disrupting a massive gas cloud — a phenomenon researchers say is the first of its kind to be detected. The cosmic behemoths reside at the center of a galaxy named 2MASX J21240027+3409114, located roughly 1 billion light-years away in the northern constellation Cygnus. These black holes complete an orbit once…

To measure the masses and spins of black holes, scientists want to follow clues left behind by light that takes a round-a-bout journey, bends around these voids, and ultimately shines toward us. The crew, from Princeton University and Los Alamos National Laboratory, has performed complex computer simulations to show how two telescopes — one on Earth, the other in space — can work together to make the idea a reality. In other words, these devices could help us detect light that has basically been on a trip around a black…

Black holes exert a tremendous influence on their surroundings, meaning that when they spin, they literally drag the very fabric of space and time around with them. That means nothing can sit still around a rotating black hole, including the “plates” that these cosmic titans feed from. Those flattened clouds of gas and dust surrounding supermassive black holes are known as accretion disks. Around some supermassive black holes, the churning of these disks is one of the most efficient ways of converting energy in the known universe — changing gravitational…

Astronomers have scoured decades-old data from NASA’s Chandra X-ray Observatory, finding bright, lumpy features dotting a jet of energy spit out by a nearby black hole. Puzzlingly, the “knots” clock a faster speed when seen in X-rays than they do in radio wavelengths. scientists said. “The X-ray data traces a unique picture that you can’t see in any other wavelength,” study lead author David Bogensberger, an astrophysicist at the University of Michigan, who led the new study, said in a recent news release. “We’ve shown a new approach to studying…

Scientists have strengthened the potential connection between dark energy and black holes. New research suggests that as more black holes were born in “little Big Bang reverse replays” in the 14.6 billion-year-old cosmos, the strength of dark energy grew to dominance and continues to change to this day. Dark energy is the placeholder name given to the mysterious force driving the acceleration of the universe’s expansion in its current epoch. It is troubling because scientists have no idea what dark energy is, yet it dominates our universe, accounting for around…

What does the supermassive black hole lurking at the center of our galaxy look like?It’s a deceptively simple question.  Although our local cosmic abyss, named Sgr A* (short for Sagittarius A*), resides just 26,000 light-years from Earth, it has proven to be a very difficult object to image. This is thanks in part to material whipping around it at near light-speeds. However, after years of trying, scientists with the Event Horizon Telescope (EHT) project succeeded in 2022.The black hole’s silhouette emerged from the shadows, appearing like a fuzzy orange doughnut.…

Using the James Webb Space Telescope, astronomers have peered back 13 billion years to discover surprisingly lonely supermassive black hole-powered quasars.  The James Webb Space Telescope’s (JWST) observations are confusing because isolated black holes should struggle to gather enough mass to reach supermassive status, especially just a few hundred million years after the Big Bang. The discovery further muddies the waters when it comes to the puzzle of how some black holes grew to masses equivalent to millions or even billions of suns when the universe was less than a…