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Categories: Physics: Acoustics and Ultrasound, Space: Structures and Features
Published Galactic fireworks: New ESO images reveal stunning features of nearby galaxies
(via sciencedaily.com) A team of astronomers has released new observations of nearby galaxies that resemble colourful cosmic fireworks. The images, obtained with the European Southern Observatory's Very Large Telescope (ESO's VLT), show different components of the galaxies in distinct colours, allowing astronomers to pinpoint the locations of young stars and the gas they warm up around them.
Published Magnetic field from MRI affects focused-ultrasound-mediated blood-brain barrier
(via sciencedaily.com) Researchers have found that the magnetic field of the MRI scanner decreased the BBB opening volume by 3.3-fold to 11.7-fold, depending on the strength of the magnetic field, in a mouse model.
Published New radio receiver opens wider window to radio universe
(via sciencedaily.com) Researchers have used the latest wireless technology to develop a new radio receiver for astronomy. The receiver is capable of capturing radio waves at frequencies over a range several times wider than conventional ones, and can detect radio waves emitted by many types of molecules in space at once. This is expected to enable significant progresses in the study of the evolution of the Universe and the mechanisms of star and planet formation.
Published Sculpted by starlight: A meteorite witness to the solar system's birth
(via sciencedaily.com) Scientists knew a burst of UV light left its mark on our solar system. Now they know the source of that light.
Published Observation, simulation, and AI join forces to reveal a clear universe
(via sciencedaily.com) Astronomers have developed a new artificial intelligence (AI) technique to remove noise in astronomical data due to random variations in galaxy shapes. After extensive training and testing on large mock data created by supercomputer simulations, they then applied this new tool to actual data from Japan's Subaru Telescope and found that the mass distribution derived from using this method is consistent with the currently accepted models of the Universe.
Published Hunting dark energy with gravity resonance spectroscopy
(via sciencedaily.com) Researchers demonstrate a robust experimental technique for studying one particular theory for dark energy. Named 'Gravity Resonance Spectroscopy,' their approach could bring researchers a step closer to understanding one of the greatest mysteries in cosmology.
Published The Goldilocks Supernova
(via sciencedaily.com) Scientists have discovered the first convincing evidence for a new type of stellar explosion -- an electron-capture supernova. While they have been theorized for 40 years, real-world examples have been elusive. They are thought to arise from the explosions of massive super-asymptotic giant branch (SAGB) stars, for which there has also been scant evidence.
Published Throwing an 'axion bomb' into a black hole challenges fundamental law of physics
(via sciencedaily.com) New research shows how the fundamental law of conservation of charge could break down near a black hole.
Published Cosmic hand hitting a wall
(via sciencedaily.com) Motions of a remarkable cosmic structure have been measured for the first time, using NASA's Chandra X-ray Observatory. The blast wave and debris from an exploded star are seen moving away from the explosion site and colliding with a wall of surrounding gas.
Published Researchers trace dust grain's journey through newborn solar system
(via sciencedaily.com) Combining atomic-scale sample analysis and models simulating likely conditions in the nascent solar system, the study revealed clues about the origin of crystals that formed more than 4.5 billion years ago. The findings provide insights into the fundamental processes underlying the formation of planetary systems, many of which are still shrouded in mystery.
Published A tiny device incorporates a compound made from starch and baking soda to harvest energy from movement
(via sciencedaily.com) Scientists have used a compound made from a starch derivative and baking soda to help convert mechanical to electrical energy. The approach is cost-effective and biocompatible, and can help charge low-energy electronics like calculators and watches.
Published Hubble data confirms galaxies lacking dark matter
(via sciencedaily.com) The most accurate distance measurement yet of ultra-diffuse galaxy (UDG) NGC1052-DF2 (DF2) confirms beyond any shadow of a doubt that it is lacking in dark matter. The newly measured distance of 22.1 +/-1.2 megaparsecs are based on 40 orbits of NASA's Hubble Space Telescope, with imaging by the Advanced Camera for Surveys and a 'tip of the red giant branch' (TRGB) analysis.
Published How a supermassive black hole originates
(via sciencedaily.com) How do supermassive black holes in the early universe originate? A team led by a theoretical physicist has come up with an explanation: a massive seed black hole that the collapse of a dark matter halo could produce.
Published Dark matter is slowing the spin of the Milky Way's galactic bar
(via sciencedaily.com) Original source For 30 years, astrophysicists have predicted such a slowdown, but this is the first time it has been measured. The researchers say it gives a new type of insight into the nature of dark matter, which acts like a counterweight slowing the spin.
Published Axions could be the fossil of the universe researchers have been waiting for
(via sciencedaily.com) Original source No one knows what happened in the universe for its first 400,000 years, but a new paper suggests discovering the hypothetical particle axion could shed light on the early history of the universe. What's more, current dark matter experiments may have already detected it in its data.
Published Turbulence in interstellar gas clouds reveals multi-fractal structures
(via sciencedaily.com) Astronomers describe the complex structure of the interstellar medium using a new mathematical method. The dispersion of interstellar turbulence in gas clouds before star formation unfolds in a cosmically small space.
Published New tool activates deep brain neurons by combining ultrasound, genetics
(via sciencedaily.com) A team has developed a new brain stimulation technique using focused ultrasound that is able to turn specific types of neurons in the brain on and off and precisely control motor activity without surgical device implantation.
Published Gravitational wave search no hum drum hunt
(via sciencedaily.com) The hunt for the never before heard 'hum' of gravitational waves caused by mysterious neutron stars has just got a lot easier, thanks to an international team of researchers.
Published Silicon chips combine light and ultrasound for better signal processing
(via sciencedaily.com) High-end wireless and cellular networks rely on light for the distribution of signals. The selective processing of such signals requires long delays: too long to support on a chip using light alone. A research team brought together light and ultrasonic waves to realize ultra-narrow filters of microwave signals, in silicon integrated circuits. The concept allows large freedom for filters design.
Published Alien radioactive element prompts creation rethink
(via sciencedaily.com) The first-ever discovery of an extraterrestrial radioactive isotope on Earth has scientists rethinking the origins of the elements on our planet.