Recent observations from NASA and Japanese X-ray observatories have helped clarify the origin of cosmic rays. The study, published in Nature, suggests that magnetic fields in supernova remnants are stronger than previously thought, enabling them to accelerate charged particles to enormous energies.
Researchers at UVA Health System discovered how cells protect themselves from DNA damage caused by UV rays, involving an unexpected connection between proteins. The study reveals part of a pathway inside human cells that regulates when and how cells repair damage to their DNA.
Brookhaven researchers developed a compound kinoform lens to surpass the critical angle limit, enabling efficient focusing of x-rays down to extremely small spots. This breakthrough advances nanoscience, energy, biology, and materials research with potential applications in alternative-energy technologies and new drug development.
Studies show that double-strand breaks and radiation-induced foci occur at specific regions of the nucleus for repair, contradicting previous assumptions of random distribution. The findings suggest a time effect, with microscope images showing nonrandom distribution of RIF within five minutes of exposure to high-energy particles.
The BHCosmo simulation reveals the integral role of black holes in galaxy formation and cosmic evolution. It provides a deeper understanding of quasar formation and helps predict where to aim future telescopes for early cosmic events and galaxy structures.
The Linac Coherent Light Source (LCLS) will be the world's first X-ray free electron laser, producing pulses of light one billion times brighter than current sources. The device will enable scientists to discover new states of matter and probe chemical reactions in real-time.
Florida Tech associate professor Eric Perlman has received $490,400 in funding from NASA's Long-term Space Astrophysics grant program to study jets and their impact on cosmic rays. His work will access the Hubble Space Telescope and Chandra X-ray Observatory to further understanding of jet dynamics and emissions.
Brookhaven National Laboratory has developed improved radiation detectors that can be used at room temperature, enhancing detection of X-rays and gamma rays. The new sensors use shielding methods to focus electrons toward the anode, improving energy resolution and efficiency.
Researchers discovered that caspase-14 plays a crucial role in maintaining the skin's balance of moisture and protecting against UVB radiation. The protein helps to regulate the processing of a key protein involved in skin structure, which can explain dehydration.
Researchers found that ultra-low-dose MDCT improved patient care and management in patients with nonspecific abdominal pain. The study showed that 37% of patients could be discharged the same day based on negative findings on MDCT.
The $20 million VERITAS telescope system, developed by Iowa State researchers, is the northern hemisphere's most sensitive instrument for detecting gamma rays. With improved data resolution, scientists can ask more precise questions about space objects and phenomena, such as supermassive black holes and dark matter.
Researchers have developed a software-based approach to detecting osteoporosis using routine dental x-rays, analyzing specific trabecular bone pattern features. This technique can predict osteoporotic conditions with the same accuracy as Bone Mass Density measurements.
A team of physicists proposes a new mechanism to produce cosmic gamma rays from starlight, challenging existing theories. The new mechanism involves the interaction of fast-moving nuclei with ultraviolet light, producing cosmic gamma rays without requiring extreme electromagnetic fields.
A five-year survey of catches at local fish markets provided the first detailed description of Indonesia's shark and ray fauna. The Australian Centre for International Agricultural Research published a 330-page field guide, Economically Important Sharks and Rays of Indonesia, featuring over 20 new species.
Astrophysicists discovered a mechanism that produces high-energy gamma rays from the Milky Way's black hole, accelerating protons to unprecedented speeds. The process creates high-energy gamma rays through collisions between accelerated protons and hydrogen gas.
Astronomers have identified an X-ray-emitting binary star system in the Small Magellanic Cloud, 170,000 light-years from Earth. The system, HD 5980, features two stars with intense winds that collide and produce multimillion-degree gas radiating brilliantly in X-rays.
Researchers have discovered that all Type Ia supernovae explode with the same mass and energy, making them useful for measuring distances. The brightness of supernovae depends on the amount of nickel they contain, allowing for more accurate calibration and future distance measurements.
A miniscule detector developed by Merlijn Hajenius at Delft University of Technology has shown promising results for studying cosmic radiation and its impact on the universe. The detector, which uses a superconductor to detect terahertz frequencies, offers new insights into star systems and planetary birth.
Cosmic superstrings, predicted by string theory, are thought to be ultra-thin tubes of energy left from the universe's beginning. They can emit gravitational waves as they decay, adding a new soundtrack to astronomy's silent movie.
Researchers have developed an automated method to identify osteoporosis sufferers in routine dental x-rays, which could help diagnose the disease earlier. The software measures jaw cortex widths, alerting dentists to potential cases, with a success rate comparable to specialist consultants.
Astronomers observe two long gamma-ray bursts that defy the consensus of supernova association, suggesting multiple ways to produce black holes and gamma-rays. The discoveries indicate a rich diversity in cosmic events and challenge the prevailing model of massive stellar death.
The COSMIC satellite system provides unprecedented information on the atmosphere's temperature and water vapor structure, enabling more accurate long-range weather forecasts and climate change analysis. The system's unique global coverage and ability to gather data above hard-to-reach locations enhance global-scale monitoring.
Astronomers have mapped the rate of acceleration of cosmic ray electrons in a supernova remnant, showing close to maximum theoretical rates. The discovery provides evidence that supernova remnants are key sites for energizing charged particles.
Research reveals a link between cosmic rays and fluctuations in Earth's biosphere productivity, with star formation rates influencing cloud cover and climate. Cosmic radiation affected biological productivity through its influence on cloud formation, leading to higher productivity during cold periods.
Astrophysicists discover gamma-ray variability on days around M87's central black hole, revealing emission region size of approximately 0.000001% of the galaxy's size. This discovery confirms M87 as a unique extragalactic source and hints at novel production mechanisms for high-energy particles.
Scientists have successfully dissociated water at high pressure to form a solid mixture of molecular oxygen and molecular hydrogen, creating an alloy. The researchers used x-rays to cleave the O-H bonds in water, resulting in a stable alloy that withstood various tests.
Joseph Dwyer is studying the phenomenon of runaway breakdown in lightning, which creates high-energy electrons that make x-rays. His research aims to understand how lightning works and could lead to new discoveries.
A new study published in Arthritis Care & Research found that weight training did not improve knee strength in patients with osteoarthritis, but may slow progression of joint space narrowing on X-rays. Patients who participated in strength training showed less joint space narrowing than those in a range-of-motion regimen.
Scientists are researching ways to reduce radiation-induced brain damage for Mars missions, which could lead to new treatments for conditions like Alzheimer's disease. The research project is part of a $14-million study funded by NASA to determine the human brain's maximum safe cosmic radiation dose.
A study of extraterrestrial dust in Antarctic ice cores found that the amount of cosmic dust falling to Earth has remained largely constant over the past 30,000 years. This finding could help refine efforts to understand the timing and effects of changes in the Earth's past climate.
The Sagittal Focusing Laue Monochromator device can focus high-energy x-rays with a large divergence, solving a technical challenge in light source scientists. It consists of two thin crystals that diffract the beam horizontally, resulting in higher beam intensity and reduced costs.
The Telescope Array in Utah will be 10 times more sensitive than previous experiments and aim to answer the mystery of cosmic rays' origin. The observatory will use fluorescence detectors and scintillation detectors to measure air showers and search for sources of ultrahigh-energy particles.
The MAGIC team discovered variable gamma-ray emission from microquasar LS I +61 303, revealing a direct relationship between the stars' interplay and gamma-ray production. The findings suggest that gamma-ray emission could be a common property of microquasars, contradicting previous expectations.
Researchers at Rice University have made an unexpected plasmonic discovery, finding that terahertz waves slow down as they pass through smaller metal wires. This phenomenon has significant implications for the development of new chemical sensors and endoscopes.
The US Office of Naval Research supports the joint US-Taiwan COSMIC satellite project, which will track hurricanes, monitor climate change, and accelerate space weather research. The constellation will provide real-time atmospheric data daily.
The COSMIC satellite network measures atmospheric data daily in real time over thousands of points on Earth using GPS signals. Temperature and water vapor profiles will help meteorologists forecast storms and study long-term climate change trends.
The US has launched a constellation of six low-orbiting satellites called COSMIC to provide real-time atmospheric data over thousands of points on Earth. The system will measure the bending of radio signals from GPS to track hurricanes, typhoons and climate change.
The COSMIC database has expanded to include data on 538 genes and 124,367 tumours, highlighting the need for further research to uncover additional breast cancer susceptibility genes. Scientists believe that many somatic mutations are caused by a combination of faulty gene and environmental factors.
Researchers at the Max Planck Institute for Solar System Research discovered 'anti-planetary' electron rays on Saturn that fly away from the planet, similar to those observed on Earth. These findings suggest a fundamental process underlying polar lights, which were previously only seen on our planet.
Astronomers have discovered a unique pulsar that is only 'on' for part of the time, shedding light on how pulsars emit regular beams of radio waves. The pulsar, PSR B1931+24, slows down 50% faster when it's active compared to when it's not.
Researchers at Boston University found that X-ray bursts from the Sun cause dramatic alterations to Mars' ionosphere, as detected by NASA's MGS spacecraft. The team used measurements on Earth to confirm the findings and gain a better understanding of the phenomenon.
Researchers have discovered a large number of supermassive black holes, outnumbering initial estimates, using deep X-ray surveys. The findings suggest that these black holes are more stable over time than previously thought.
A new theory published in Geophysical Research Letters explains the energization of anomalous cosmic rays by including a realistic termination shock shape. The model shows that particles are accelerated on the flanks of the termination shock, contradicting previous assumptions.
The H.E.S.S. collaboration has discovered gamma-ray emission from a complex of gas clouds near the Milky Way Galaxy's centre, revealing a prehistoric particle accelerator. The density of cosmic rays exceeds that in the solar neighbourhood, suggesting recent acceleration.
UI researchers discovered a giant star orbiting a 'medium-sized' black hole every 62 days, indicating the star's enormous size and brightness in X-rays. This finding may help confirm a class of black holes with masses between 100 and 10,000 solar masses.
Researchers have detected gamma rays from radioactive aluminium (26Al) originating from the central regions of the Galaxy, indicating an ongoing process of new atomic nucleus production. The estimated total amount of radioactive 26Al is equivalent to three solar masses, corresponding to a galactic rate of supernovae every 50 years.
Scientists use Chandra to observe the Northern Lights dancing in X-ray light, revealing changing bright arcs of energy above the Earth's surface. The team detects low-energy X-rays generated during auroral activity, expanding our understanding of solar storms and their impact on the planet.
Researchers at New York University's Milagro facility have detected the most energetic gamma rays yet observed along the galactic equator, reaching 3.5 trillion electron-volts in energy. The findings, published in Physical Review Letters, provide new insights into cosmic-ray interactions with interstellar medium.
Researchers found that chest x-rays were a reliable predictor of mortality in patients with avian flu, with the severity of findings linked to patient outcomes. Five patients who survived still had abnormal lung appearances on CT scans after discharge.
The National Ignition Facility's first experiments successfully validated computer simulations for controlled laser-induced ignition. Researchers fired laser beams into gold-plated cylinders, creating X-rays that ablated and imploded a capsule to achieve brief bursts of energy.
The Pierre Auger Observatory is constructing an array of 1600 detectors in Argentina to study ultra-high-energy cosmic rays. The collaboration includes 370 scientists from 60 institutions and has set out to answer fundamental questions about the origins of these rare particles.
Researchers have found that high-voltage sparks can produce x-ray bursts, similar to those observed during lightning. This discovery opens the door for studying the poorly understood phenomenon of runaway breakdown in a lab setting.
The MAGIC telescope has tracked a long duration gamma-ray burst, GRB050713A, in the X-ray and very high energy gamma ray band. The observation was made possible by rapid tracking of the telescope, which allowed it to start observing the source just 20 seconds after an alert from the Swift satellite.
A case-control study involving 445 men found an association between cumulative cosmic radiation dose and nuclear cataract risk among commercial airline pilots. The odds ratio was 3.02 for pilots compared with nonpilots, indicating a potential causative factor in nuclear cataracts.
Researchers at NIST have developed an improved experimental X-ray detector that can detect X-rays across a broad range of energies with pinpoint energy resolution. The new detector uses quantum-level, transition edge sensors and improved temperature control systems, eliminating the need for constant recalibrations.
The 'Deep Impact' collision released tens of thousands of tons of material, enough to bury a football field under 30 feet of comet dust. Scientists are analyzing X-ray data to better understand the evaporation process on comets and their interaction with solar wind.
Swift detected a quick rise in ultraviolet light after the Deep Impact probe struck a hard surface on the comet, revealing secrets about the impact.
Researchers at Berkeley Lab's Center for X-Ray Optics achieved a resolution of better than 15 nanometers using zone plate lenses, surpassing previous limits. The new technique allows for the fabrication of small three-dimensional structures and has potential applications in biology, chemistry, and nanotechnology.
X-ray flashes and gamma-ray bursts, two powerful cosmic explosions, have long been linked in theory. New satellite data, however, suggests that these events may not be as connected as previously thought, contradicting popular theories.
A recent study found that chest CT scans are necessary for multiple trauma patients, even if initial X-ray results appear normal. The study analyzed data from 563 patients and revealed that X-rays missed 40% of clinically significant thoracic injuries.