Researchers at Nagoya University have developed a method to detect hidden matter around black holes by analyzing changes in ringdown waves. The study found that hidden matter affects ringdown differently depending on its pressure arrangement around the black hole.
A team of researchers has discovered four sets of dual 'Little Red Dots' (LRDs) in the early universe, indicating a possible link between galaxy mergers and rapidly growing black holes. The findings suggest that black hole mergers could be responsible for the rapid growth of black holes in the early universe.
Urban greenery provides substantial cooling benefits but also complicates ozone control by stabilizing the urban boundary layer and releasing ozone-polluting compounds. Locally tailored greening strategies are needed to maximize cooling benefits while minimizing air-quality trade-offs
China's ozone pollution has increased despite PM2.5 declines, with urban areas under VOC-limited conditions; large-scale NOx reduction is a proposed near-term control strategy. Ambient ozone direct catalytic decomposition coatings can deliver localized ozone removal at a lower projected economic cost.
Astronomers have discovered the fastest star in the Milky Way, S301, orbiting the supermassive black hole Sagittarius A* at a speed of 25,000 km/s. The star's tight orbit takes just 8.7 years to complete and approaches the black hole at a mere 12 times the distance of Earth to the Sun.
A team of astronomers has discovered an extremely bright and red spot in the early universe, which they believe is a mashup of a black hole and a star. The object, dubbed a 'black hole star,' would help solve the mystery of other mysterious 'little red dots' found in deep-space images.
Scientists have discovered that record-high Arctic stratospheric ozone levels observed in March 2024 were caused by exceptionally strong planetary waves, El Niño, and other large-scale climate oscillations. The study's findings highlight the growing importance of atmospheric dynamics in controlling Arctic ozone variability.
Researchers have produced a spatially resolved spectral-index map on event-horizon scales, determining the physical conditions of the plasma around the black hole. The study reveals a transition toward an optically thin emission regime at a distance of about 30 μas from the black hole.
Researchers analyze the 'ringdown' phase of black hole collisions to test Einstein's theory of General Relativity and uncover secrets about these mysterious objects. Future observatories may reveal fresh evidence for new physics and challenge current models.
An international team of astronomers has directly measured the mass of an inactive supermassive black hole in the early Universe for the first time. The study found that the black hole is about 12 times more massive than expected from its host galaxy, suggesting that the central engine was already fully grown while the galaxy around it...
Researchers at Penn State have developed a new measure for entropy that is more closely tied to the black hole's physical properties of spin and energy. This allows them to extend the first and second laws of thermodynamics to dynamic black holes, enabling better understanding of their processes.
Researchers found evidence of early ozone loss dating back to the late 1950s, linked to carbon tetrachloride use, in contrast to CFCs' later role. This discovery reveals that modern monitoring tools could have detected earlier signs of human-induced depletion.
Researchers developed a green catalyst from cotton hulls that can dramatically improve the ability of ozone to remove stubborn organic pollutants from water. The nitrogen-doped biochar catalyst, N-BC-800, achieved 94% removal of DEET, outperforming ozone alone and unmodified biochar.
A new study reveals that wildfires have led to a decade-long reversal of ozone mitigation efforts in the US. Exposure to surface ozone from wildfires contributes to thousands of additional premature deaths each year.
Astrophysicists at Northwestern University have discovered evidence of a powerful wind blowing from the Milky Way's central supermassive black hole, Sagittarius A*. The study resolves one of the longest-standing mysteries in astronomy and opens a new window into the physics at play in the center of the Milky Way. The team used five yea...
Researchers have discovered the most distant dormant black hole yet detected, located over 10 billion light years away. The black hole's mass is approximately 6 billion times that of the sun, providing unprecedented insights into black holes in the early universe.
A team of astronomers used JWST to detect the motion of stars near a galaxy's center affected by a dormant black hole's gravity. The findings suggest that densest galaxies were sites of rapid black hole growth early in cosmic history.
Reducing methane emissions slows climate change, but also hinders the recovery of the ozone layer by making other ozone-depleting substances more potent. The study suggests that large-scale methane cuts could delay the ozone layer's recovery by 2.4% by 2100 and increase UV radiation exposure by 30-35%
A new study found that air pollution can disrupt insect communication by chemically altering pheromones. Ozone pollution degrades pheromone signals in moths, reducing mating success and threatening pheromone-based pest control strategies.
A new study found that ozone pollution reduces the health benefits of exercising at recommended levels for children's lung growth. The researchers analyzed data from over 3,400 children and found that moderate activity did not show similar benefits as vigorous exercise, while ozone exposure was a key limiting factor.
Researchers developed a method to identify and catalogue quasinormal modes in black hole mergers, providing a systematic way to resolve ongoing debate. The technique detects fundamental 'notes', overtones, and nonlinear modes, enabling precise tests of general relativity.
Researchers at Empa found that industrial chemicals, used in refrigerants and plastics, escape into the atmosphere at a rate of 3-4%, delaying ozone layer recovery by 7 years. These substances also emit significant greenhouse gases, posing a dual threat to the climate.
Scientists calculate that high leakages of ozone-depleting substances from feedstocks could delay ozone recovery by about seven years. The Montreal Protocol made an exception for the use of these substances in producing other materials, but recent estimates suggest higher leakage rates than initially thought.
Researchers developed a nitrogen-doped biochar that enhances ozone-based water treatment efficiency by over 100 times, removing persistent pollutants like DEET. The catalyst also shows strong performance against pharmaceuticals and herbicides, offering a promising solution for tackling emerging contaminants.
Research reveals a cross-seasonal connection between tropical Pacific Ocean warming and Antarctic stratospheric changes, with warming in the tropics leading to weakening of the polar vortex and ozone depletion. The study improves predictions of Southern Hemisphere climate patterns and offers insights into Antarctic ozone variability.
A study finds that high wintertime total column ozone over the Qinghai Tibetan Plateau triggers changes in North Pacific sea surface temperatures. Higher ozone levels drive eastward-propagating Rossby wave trains, which in turn cause southward ocean currents and lower temperatures in the subtropical central-western North Pacific.
A preliminary study found that short-term exposure to wildfire smoke was associated with a higher incidence and severity of stroke, particularly in patients with elevated ozone and particulate matter levels. The study suggests that public health interventions during wildfires are crucial for preventing strokes.
Researchers discovered a star in the Andromeda Galaxy that vanished without going supernova, instead collapsing directly into a black hole. The team's analysis revealed the process of stellar collapse and provided evidence for convection's role in shaping a black hole's outer layers.
Researchers propose a new way to observe tightly bound supermassive black hole binaries using gravitational lensing and starlight. The method could reveal key properties of the underlying black hole binary, including masses and orbital evolution.
Researchers have been tracking the unusual astronomical event for four years and predict that the energy will peak in 2027. The black hole's emission has increased exponentially, reaching 50 times its original brightness.
Exposure to ozone levels found in affected areas alters the ants' odor signature, causing them to be attacked as if they were foreign intruders. The disruption of chemical communication between adult ants and larvae may also lead to neglect of brood care and larval death.
A comprehensive study shows that OVOCs supply more than half of the radicals responsible for ozone production, challenging conventional control strategies. The findings highlight the importance of comprehensive OVOC observations to improve model accuracy and guide emission control priorities.
A global strategy is required to address the issue of reduced ozone decline despite decreased emissions of precursor pollutants in North America and Europe. The study found that increased transport of ozone from abroad is the main driver of the weaker-than-expected decline of ozone levels.
A team of astronomers has discovered a supermassive black hole with extreme growth rates, contradicting current models. The black hole is emitting bright X-rays and radio waves, hinting at unknown physical mechanisms. This finding provides a rare glimpse into time-variable black hole growth in the early Universe.
Astronomers have captured a vivid portrait of a 'reborn' black hole, likened to the eruption of a 'cosmic volcano', in the radio galaxy J1007+3540. The black hole's newly ignited jets are being bent and distorted by the massive galaxy cluster environment.
Scientists discovered a novel method to identify upper-layer ozone intrusion events, which substantially elevate surface ozone levels and intensify atmospheric oxidation capacity. ULOI events accelerate wintertime sulfate and secondary organic aerosol formation in the North China Plain.
Astronomers have discovered that black holes don't just consume matter — they manage it. Researchers found that black hole binary systems switch between powerful jets and energetic winds—never producing both simultaneously—and both types of outflows carry away comparable amounts of mass and energy.
Researchers designed a novel SAM to optimize hole transport in inverted PSCs, replacing 4PACZ with an extended π-conjugated dinaphtho[2,3-c:2',3'-g]carbazole. This leads to improved performance and stability, surpassing 24.32% PCE.
Scientists have observed a swirling vortex in spacetime caused by a rapidly rotating black hole, confirming predictions made by Einstein more than a century ago. The team detected rhythmic changes in X-ray and radio signals from the event, showing that the disk and jet were wobbling in unison every 20 days.
Astronomers discovered a never-seen-before blast from a supermassive black hole, whipping up powerful winds at 60,000 km per second. The event was triggered by an X-ray flare and formed in just one day, providing new insights into the magnetism of active galactic nuclei (AGNs).
Researchers have discovered key design principles for ozone-generating catalysts, which can replace hazardous and carcinogenic chlorine in water treatment. This breakthrough could revolutionize water sanitation practices by providing a safer and more sustainable alternative.
Researchers developed a comprehensive model of luminous black hole accretion, including radiation flows and interactions with surrounding gas. Their simulations reproduce consistent behaviors across various black hole systems, providing insight into extreme nonlinear processes.
Scientists use XL-Calibur telescope to measure polarization of light around Cygnus X-1 black hole, gaining insights into matter's fall and energy release. The observations will be used to test computer simulations and shed light on black hole physics.
A research team at the Purple Mountain Observatory confirms Stephen Hawking's prediction that a black hole's horizon area cannot shrink when two black holes merge. The analysis of GW230814 shows strong support for the black-hole area law, validating general relativity in extreme astrophysical environments.
Researchers developed a simulation method to model rotating regular black holes, which naturally show time-varying patterns of light and shadow. This breakthrough enables faster exploration of different black hole configurations without requiring delicate tuning.
Scientific research indicates that Spain must significantly reduce nitrogen oxide emissions from road traffic and control industrial emissions to lower tropospheric ozone levels before 2030. Implementing measures such as maximizing renewable energy use, promoting electrification of transportation, and implementing emission controls for...
A new study finds that large wildfires like those in Colorado, Oregon, and California increase ozone concentrations by 21 parts per billion, exceeding health standards. The research team developed a computer model to simulate the effects of wildfire smoke on ozone levels, highlighting the urgent need for air quality monitoring.
A rare glimpse into Mars's north polar vortex has revealed that it produces a seasonal ozone layer. The extreme cold temperatures inside the vortex allow ozone to accumulate, making it essential for understanding Martian atmosphere chemistry. This finding has significant implications for the search for past life on Mars.
A team of physicists at UMass Amherst propose that we may soon observe an exploding primordial black hole, which could reveal the foundations of the universe and provide a definitive catalog of subatomic particles. This explosion would give us insight into the formation of black holes and the universe's primordial conditions shortly af...
A new study reveals that drought and ozone pollution significantly reduce soybean yield, regardless of drought stress levels. Researchers found that elevated ozone concentrations disrupt photosynthesis and hormone signaling in plants, leading to reduced yield and seed development.
A new study found that future changes in ozone will cause 0.27 watts per square meter of extra warming, making it the second largest contributor to future warming after carbon dioxide. This means countries' efforts to ban CFCs and HCFCs have provided less climate benefit than previously calculated.
The XRISM observation revealed clear absorption lines from highly ionized iron at the system's faintest X-ray phase, providing a rare glimpse into hot gas structure and motion. The results suggest that even in low-luminosity states, highly ionized gas can be present around black holes.
New research finds that wildfire smoke substantially increases ozone concentrations, even in remote areas with few human emission sources. The study suggests that removing anthropogenic NOx emissions would not eliminate ozone problems, as fires can still produce ozone.
An interstellar mission to test astrophysical black holes is proposed by Cosimo Bambi, harnessing nanocrafts and laser beams to gather data on nearby black holes. The mission aims to answer pressing questions in physics, including the nature of event horizons and general relativity.
Researchers have discovered a potentially massive black hole, 36 billion solar masses, in the Cosmic Horseshoe galaxy. The discovery was made using a combination of gravitational lensing and stellar kinematics, allowing for more certainty about the mass of this black hole than previous measurements.
A study analyzing ozone pollution's impact on crop yields in China reveals significant yield losses of major staple crops, including rice, wheat, and maize. The researchers found that COVID-19 lockdowns led to reduced emissions, but projections suggest a continued risk of 8%–18% yield loss by 2050 without emission control.
The LIGO-Virgo-KAGRA Collaboration has detected the merger of two massive black holes, producing a final black hole approximately 225 times the mass of our Sun. The signal presents a challenge to current astrophysical models and requires advanced theoretical tools to interpret.
The LIGO-Virgo-KAGRA Collaboration detected the merger of two massive black holes, producing a final black hole over 225 times the mass of our Sun. The signal challenges current astrophysical models and requires the use of theoretical models to interpret its complex dynamics.
A new AI-powered model has been developed to predict surface ozone concentration in the North China Plain and Yangtze River Delta regions. The model achieves high prediction accuracy, with hit rates of 83% and R² ≥ 0.85, providing a clearer picture of how weather patterns drive ozone pollution.
Global soil nitrous acid emissions have increased from 1980 to 2016, contributing to a 2.5% annual rise in the global surface ozone mixing ratio. This can lead to overexposure of vegetation to ozone, affecting ecosystem balance and food crop production.