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Study explains how supermassive black holes first appeared in the early universe

Study explains how supermassive black holes first appeared in the early universe

Science
June 28 (UPI) -- Scientists have developed a new model for the formation and growth of supermassive black holes that could explain their appearance in the early universe. According to the new study, published this week in the Astrophysical Journal Letters, supermassive black holes grow extremely fast over a very short amount of time, and then very suddenly, stop growing. Scientists came up with the new model to better explain the distribution of supermassive black hole masses and luminosities throughout the distant universe. "This is indirect observational evidence that black holes originate from direct-collapses and not from stellar remnants," Shantanu Basu, an astronomy professor at the University of Western Ontario, said in a news release. Basu and his colleague Arpan Das analyzed th...
Watch live: Scientists to unveil images of supermassive black hole’s event horizon

Watch live: Scientists to unveil images of supermassive black hole’s event horizon

Science
April 10 (UPI) -- An international team of scientists is expected to share the first images of a supermassive black hole captured by the Event Horizon Telescope on Wednesday morning. During a press conference, researchers with the Event Horizon Telescope Collaboration will present a "groundbreaking result," according to a press release. The collaboration involved the efforts of astronomers from all over the globe. Multiple teams worked to coordinate the observations of eight radio telescopes using Very Long Baseline Interferometry. "This technique of linking radio dishes across the globe to create an Earth-sized interferometer, has been used to measure the size of the emission regions of the two supermassive black holes with the largest apparent event horizons," according to EHT. Six pr...
Eighty-three supermassive black holes found in the distant universe

Eighty-three supermassive black holes found in the distant universe

Science
March 13 (UPI) -- Astronomers have discovered 83 new supermassive black holes in the distant universe, or early universe, representing a time when the university was less than 2 billion years old. Researchers were surprised to find so many quasars, glowing galactic nuclei powered by supermassive central black holes, in the early universe, just a few hundred million years after the Big Bang. "Understanding how black holes can form in the early universe, and just how common they are, is a challenge for our cosmological models," Michael Strauss, a professor of astrophysical sciences at Princeton University, said in a news release. Scientists found the quasars using the Subaru Telescope's Hyper Suprime-Cam. The telescope, which is operated by the National Astronomical Observatory of Japan, i...
Security holes found in big brand car alarms

Security holes found in big brand car alarms

Technology
Media playback is unsupported on your device Security flaws in three specialist car alarms have left vehicles vulnerable to being stolen or hijacked, say researchers.The bugs were found in alarm apps by Clifford, Viper, and Pandora. The alarms are on three million vehicles.The security researchers exploited the bugs to activate car alarms, unlock a vehicle's doors and start the engine via an insecure app. The expose has prompted the firms to upgrade security to remove the flaws.Alarms 'unhackable'The research was carried out for the BBC's Click technology programme by security consultants Pen Test Partners, which has a long track record of uncovering software flaws. The firm focussed on two well-known firms that produce alarms that can be acce...
New foldable drone can navigate narrow holes

New foldable drone can navigate narrow holes

Science
Dec. 12 (UPI) -- Drones can be used to explore environs too difficult and dangerous for humans to navigate, like a burned out building or the rubble of a collapsed bridge. But often, entrances to and passageways through these environments are quite small -- holes and cracks measuring just a few inches wide. Engineers at the University of Zurich have developed a foldable drone that can shrink itself to fit through small holes. The technology could help drones navigate tight confines during search and rescue missions in the wake of a disaster. Inspired by birds, which can fold their wings mid-flight, Swiss engineers built a drone that can fold its arms in order to fly through small spaces without sacrificing aerial stability. Researchers described their new technology in the journal IEEE Ro...