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Categories: Physics: Acoustics and Ultrasound, Space: Structures and Features
Published NASA's Webb Telescope reveals links between galaxies near and far
(via sciencedaily.com) A new analysis of distant galaxies imaged by NASA's James Webb Space Telescope shows that they are extremely young and share some remarkable similarities to 'green peas,' a rare class of small galaxies in our cosmic backyard.
Published Physicists confirm effective wave growth theory in space
(via sciencedaily.com) Physicists have used spacecraft data to confirm an important theory of plasma physics that improves our understanding of space weather.
Published James Webb telescope reveals Milky Way-like galaxies in young universe
(via sciencedaily.com) New images from NASA's James Webb Space Telescope (JWST) reveal galaxies with stellar bars -- elongated features of stars stretching from the centers of galaxies into their outer disks -- at a time when the universe was a mere 25% of its present age. The finding of so-called barred galaxies, similar to our Milky Way, this early in the universe will require astrophysicists to refine their theories of galaxy evolution.
Published Hubble finds that ghost light among galaxies stretches far back in time
(via sciencedaily.com) In giant clusters of hundreds or thousands of galaxies, innumerable stars wander among the galaxies like lost souls, emitting a ghostly haze of light. These stars are not gravitationally tied to any one galaxy in a cluster. The nagging question for astronomers has been: how did the stars get so scattered throughout the cluster in the first place? Several competing theories include the possibility that the stars were stripped out of a cluster's galaxies, or they were tossed around after mergers of galaxies, or they were present early in a cluster's formative years many billions of years ago.
Published Tracking radiation treatment in real time promises safer, more effective cancer therapy
(via sciencedaily.com) Radiation, used to treat half of all cancer patients, can be measured during treatment for the first time with precise 3D imaging. By capturing and amplifying tiny sound waves created when X-rays heat tissues in the body, medical professionals can map the radiation dose within the body, giving them new data to guide treatments in real time. It's a first-of-its-kind view of an interaction doctors have previously been unable to 'see.'
Published Team writes letters with ultrasonic beam, develops deep learning based real-time ultrasonic hologram generation technology
(via sciencedaily.com) A team has developed a 'deep learning-based ultrasound hologram generation framework' technology that can freely configure the form of focused ultrasound in real time based on holograms. It is expected to be used as a basic technology in the field of brain stimulation and treatment that requires precision in the future.
Published A type of simple, DIY air filter can be an effective way to filter out indoor air pollutants
(via sciencedaily.com) A study found that inexpensive, easy-to-assemble Corsi-Rosenthal boxes can help reduce exposure to indoor air pollutants. The air filters have already been shown to reduce particles carrying the SARS-CoV-2 virus.
Published Brain flexibility may hasten hearing improvements from cochlear implants
(via sciencedaily.com) Kickstarting the brain's natural ability to adjust to new circumstances, or neuroplasticity, improves how effectively a cochlear implant can restore hearing loss, a new study in deaf rats shows. The investigation, researchers say, may help explain the extreme variation in hearing improvements experienced by implant recipients.
Published Measuring gamma-ray bursts' hidden energy unearths clues to the evolution of the universe
(via sciencedaily.com) When stars die out, they emit gamma-ray bursts. Although scientist can calculate the explosion energy from dying stars, it is difficult to do when the conversion efficiency is low or unknown. Using light polarization, a research group has found a workaround for this, enabling astronomers to calculate the hidden energy of gamma-ray bursts.
Published Alien planet found spiraling to its doom around an aging star
(via sciencedaily.com) The condemned planet could help answer questions about the fate of other worlds as their solar systems evolve.
Published Webb Space Telescope reveals previously shrouded newborn stars
(via sciencedaily.com) Astronomers took a 'deep dive' into one of the first images from NASA's James Webb Space Telescope and were rewarded with a surprising discovery: telltale signs of two dozen previously unseen young stars about 7,500 light years from Earth.
Published Astronomers find that two exoplanets may be mostly water
(via sciencedaily.com) Astronomers have found evidence that two exoplanets orbiting a red dwarf star are 'water worlds,' planets where water makes up a large fraction of the volume.
Published Machine learning reveals how black holes grow
(via sciencedaily.com) Black holes are surrounded by an invisible layer that swallows every bit of evidence about their past. Researchers are now using machine learning and supercomputers to reconstruct the growth histories of black holes.
Published ESPRESSO and CARMENES discover two potentially habitable exo-Earths around a star near the sun
(via sciencedaily.com) Researchers have discovered the presence of two planets with Earth-like masses in orbit around the star GJ 1002, a red dwarf not far from our solar system. Both planets are in the habitability zone of the star.
Published Discovering rare red spiral galaxy population from early universe with the James Webb Space Telescope
(via sciencedaily.com) Morphology of galaxies contain important information about the process of galaxy formation and evolution. With its state-of-the-art resolution, NASA's James Webb Space Telescope has now captured several red spiral galaxies in its first image at an unprecedented resolution. Researchers have now analyzed these galaxies, revealing that these are among the furthest known spiral galaxies till date. The analysis further detected a passive red spiral galaxy in the early universe, a surprising discovery.
Published Antihelium nuclei as messengers from the depths of the galaxy
(via sciencedaily.com) How are galaxies born, and what holds them together? Astronomers assume that dark matter plays an essential role. However, as yet it has not been possible to prove directly that dark matter exists. A research team has now measured the survival rate of antihelium nuclei from the depths of the galaxy -- a necessary prerequisite for the indirect search for Dark Matter.
Published Without more data, a black hole's origins can be 'spun' in any direction
(via sciencedaily.com) A study finds that, for now, the catalog of known black hole binaries does not reveal anything fundamental about how black holes form. More data will be needed to determine whether the invisible giants arose from a quiet galactic disk or a more dynamic cluster of stars.
Published NASA missions probe game-changing cosmic explosion
(via sciencedaily.com) On Dec. 11, 2021, astronomers detected a blast of high-energy light from the outskirts of a galaxy around 1 billion light-years away. The event has rattled scientists' understanding of gamma-ray bursts (GRBs), the most powerful events in the universe.
Published Meteorites plus gamma rays could have given Earth the building blocks for life
(via sciencedaily.com) Even as detailed images of distant galaxies from the James Webb Space Telescope show us more of the greater universe, scientists still disagree about how life began here on Earth. One hypothesis is that meteorites delivered amino acids -- life's building blocks -- to our planet. Now, researchers have experimentally shown that amino acids could have formed in these early meteorites from reactions driven by gamma rays produced inside the space rocks.
Published Peekaboo! Tiny, hidden galaxy provides a peek into the past
(via sciencedaily.com) Peeking out from behind the glare of a bright foreground star, astronomers have uncovered the most extraordinary example yet of a nearby galaxy with characteristics that are more like galaxies in the distant, early universe. Only 1,200 light-years across, the tiny galaxy HIPASS J1131-31 has been nicknamed "Peekaboo" because of its emergence in the past 50-100 years from behind the fast-moving star that was obscuring astronomers' ability to detect it.