Articles tagged with Luminosity
A new framework predicts AIE behavior using quantum chemical calculations, identifying key structural factors that control excited-state dynamics. The framework enables rational design of luminescent AIE materials for applications like OLEDs, bioimaging, and sensors.
Researchers create molecular crystal with reversible color changes spanning from green to orange-red upon mechanical stress or pressure. The material exhibits adaptive intermolecular interactions and structural flexibility, enabling stimulus-responsive luminescence.
The team developed a new method to produce ultrafast squeezed light, which can fluctuate between intensity and phase-squeezing by adjusting the position of fused silica relative to the split beam. This breakthrough could lead to more secure communication and advance fields like quantum sensing, chemistry, and biology.
Researchers have observed the luminescence of an excited complex formed by two donor molecules, opening possibilities for developing simpler, more efficient OLED devices. The discovery also enables the creation of sensitive sensors capable of detecting low concentrations of explosive substances.
Astronomers have observed the faint light from stars in the host galaxies of three ancient quasars, revealing clues to how the earliest supermassive black holes and galaxies evolved. The study suggests that some of the earliest
Researchers observed molecular gas outflow from quasar J2054-0005 using ALMA, revealing suppression of star formation in its host galaxy. The findings confirm theoretical predictions and provide strong evidence for powerful molecular gas outflows in early Universe quasars.
Researchers unveil previously unknown type of shockwave within TDEs, confirming that shock dissipation powers the brightest phases. The study paves the way for precise measurements of crucial black hole properties and testing Einstein's predictions in extreme environments.
Researchers from EPFL and University of Bologna used asteroseismology to calculate star distances, providing accurate measurements and validating Gaia's parallax data. The study analyzed over 12,000 oscillating red giant stars, measuring their vibrations and oscillations to determine stellar properties.
A new theory, self-interacting dark matter (SIDM), proposes that dark matter particles interact through a dark force, explaining high-density halos and low-density halos of ultra-diffuse galaxies. SIDM simulates cosmic structure formation with strong dark matter self-interactions, diversifying halo density in central regions.
Scientists have observed bright, brief flashes months after a stellar explosion, confirming that the engine of the LFBOT is a black hole or neutron star. This unprecedented behavior shows that the object emitted multiple supernova-strength optical flares on timescales of less than a minute.
Researchers confirmed that Maisie's Galaxy is at a high redshift of z ≈ 11.5 and disproved the existence of a previously thought-to-be-most-distant galaxy. The study also revealed another galaxy at a lower redshift, contradicting initial theories.
Scientists have developed a new method to measure moderately saturated sources of the Ultra-Violet Optical Telescope onboard the Swift satellite. GRB 220101A is the most energetic ultraviolet/optical flare ever detected, with a luminosity approximately 400 quadrillion times that of the Sun.
Astronomers have discovered a supermassive black hole consuming a giant star, producing a long-lived transient object that is orders of magnitude brighter and more energetic than any recorded before. The object, named Scary Barbie, has lasted over two years and may be visible for years to come.
The POSTECH team developed a multifunctional tip-enhanced spectroscopy that dynamically controls the physical properties of quasiparticles in 2D materials. This technology increases interlayer excitons' luminous efficiency by 9,000 times and modulates their energy.
Researchers have measured the size-luminosity relation of galaxies less than a billion years after the Big Bang for the first time. The team used multiband imaging data from the GLASS-JWST program to study galaxy properties in rest-frame optical and UV bands.
A team led by University of Maryland astronomer Igor Andreoni discovered a bright optical flare caused by a dying star's encounter with a supermassive black hole. The event, AT2022cmc, is extremely rare and was found using a novel data pipeline that analyzed the Zwicky Transient Facility survey.
Scientists developed new cyanopyrazine-based fluorophores that are 2.4 to 20 times more intense than analogues. The presence of a cyanogroup significantly increases the efficiency of OLEDs, leading to improved brightness.
Astronomers detect massive light burst from 'infant' Universe, revealing properties of cosmic explosions. The GRB was triggered by a space explosion that occurred when the Universe was less than 900 million years old.
Researchers found that dark matter halos in ultra-diffuse galaxies have lower concentrations than expected, raising questions about their formation and evolution. The study's surprising results indicate these galaxies may be younger and contain more gas than normal galaxies.
Researchers have developed a new light-emitting material that doubles the intensity of existing LEDs while also being more energy-efficient. The material, cerium-doped zinc oxide, has the potential to be used in commercial LED lighting applications and could make lighting more affordable for households and businesses worldwide.
Researchers used simulations to detect extended dwarf galaxies with low surface brightness, challenging previous theories. The study found that these 'quenched' UDGs originated in backsplash orbits and are isolated from their parent systems.
Astronomers capture breathtaking images of AG Carinae, a luminous blue variable star surrounded by a glowing halo of gas and dust. The star is in a constant battle to maintain stability due to its massive form and super-hot temperatures.
The Hubble imaging Probe of Extreme Environments and Clusters (HiPEEC) survey investigates how star clusters form and evolve during galaxy mergers. The study reveals large and rapid variations in star cluster properties, with the most massive clusters formed towards the end of the merger phase.
Researchers at University of Kansas discover a galaxy 5.25 billion light years away undergoing a rare stage in its life cycle, where an X-ray luminous AGN coexists with high star formation rates. The team found that the galaxy is still generating new stars despite the presence of the active galactic nucleus.
A Northwestern University-led team has uncovered the true nature of rare, mysterious events called calcium-rich supernovae. The researchers used X-ray imaging to study a calcium-rich supernova and found that it is a compact star shedding an outer layer of gas before exploding, producing bright X-rays and massive amounts of calcium.
Astronomers detected a massive star in the Kinman Dwarf galaxy that vanished without producing a supernova. Theories suggest the star may have collapsed into a black hole or been transformed by dust, challenging current understanding of massive star deaths.
The Columbia University-led team will design, build and test key electronic components for the ATLAS system to enhance its capabilities. The high-luminosity LHC upgrade is expected to increase collisions by a factor of 10, enabling scientists to collect data more efficiently and analyze new particles.
A new technique for developing light-emitting fabrics has been developed by coating ultrasheer pantyhose with a thin layer of gold. The result is a soft, stretchable, and washable fabric that can be used to create wearable luminous clothing, while overcoming some of the limitations of existing light-emitting fabrics.
Research by Lancaster University and the University of Strathclyde found that kitsch religious souvenirs bring a deeper connection for pilgrims and their loved ones. These objects serve as tangible links to the pilgrimage experience, conveying a sense of belonging even for those who didn't make the journey.
Scientists at Max Planck Institute create a single-layer OLED that outperforms traditional designs in terms of brightness and efficiency. The new technology achieves record-high luminosity and long lifetimes, making it suitable for industrial purposes.
The Hubble Space Telescope's Wide Field Camera 3 has captured a breathtaking image of NGC 7773, a mature barred spiral galaxy. The galaxy features a luminous bar-shaped structure, thought to be a sign of galactic maturity and stellar nursery.
NGC 4621, also known as Messier 59, is an elliptical galaxy exhibiting signs of star formation contrary to typical elliptical galaxies. Located approximately 50 million light-years away, the galaxy was observed using Hubble Space Telescope's Advanced Camera for Surveys.
The Hubble Space Telescope has revealed a stunning image of Messier 3, a massive globular cluster containing over half a million stars. The cluster features 274 variable stars, including the rare RR Lyrae type, which can be used as standard candles to measure vast celestial distances.
Astronomers have found a rare gamma-ray burst candidate in the Milky Way's star system Apep, which could pose a threat to Earth. The system, featuring a pair of scorchingly luminous stars, is thought to be on the brink of a massive supernova explosion.
Astronomers found a dust-obscured quasar formed from a galaxy merger, revealing how mergers can power quasars and obscure them with dust. The study used ALMA to analyze the quasar WISE J224607.57?052635.0 and its companion galaxies.
Three-dimensional simulations of the luminous blue variable star have revealed the physical forces behind its wild variations in brightness and spectrum. The simulations show that convection plays a key role in triggering outbursts, with helium opacity being a crucial factor.
Astrophysicists use 3D simulations to explain how luminous blue variables launch material into space through intense light and turbulent motion. The study sheds light on the violent mood swings of rare, massive stars that can shed billions of metric tons of material annually.
Researchers from the Institute of Atmospheric Physics in China used a long-baseline lightning location network to track more than 30 red sprites. The study found that most sprite-producing cloud-to-ground strokes occurred during the mature stage of an asymmetric mesoscale convective system, with locations typically within 10 km.
Astronomers have discovered the most luminous nova ever seen in a nearby galaxy, using data from the Swift satellite observatory. The study provides insights into white dwarf eruptions, including the possibility of a supernova explosion in the future.
The study found that low-intensity gamma radiation is only destructive and has a linear correlation in dose-effect coordinates. The duration of exposure is more significant than the absorbed dose in terms of toxic effect on organisms.
Researchers observe two X-ray pulsars transitioning to the propeller regime, providing valuable information about their magnetic fields and surrounding temperatures. The study reveals that giant outbursts are associated with the transition, offering a unique window into these intensely magnetized stars.
Researchers modeled massive star formation using high-performance computers, discovering episodic luminosity bursts that outshine the collective effect of 100,000 Suns. These bursts are thought to be caused by the migration of dense clumps through accretion disks, offering new insights into the birth process of massive stars.
A team of researchers found a way for neutron stars to avoid the 'traffic jam' that limits their brightness, enabling them to become hundreds of times brighter than expected. This discovery challenges current understanding and provides new insights into the nature of these mysterious objects.
Researchers detected gamma-ray emission in Arp 220, revealing extreme energetic processes and hidden cosmic rays. The finding expands energy observations of galaxies and sheds light on the population of extreme energetic particles.
The NASA/ESA Hubble Space Telescope has captured a striking image of the spiral galaxy NGC 6814, showcasing its luminous nucleus and sweeping arms. The galaxy's extremely bright center is believed to host a supermassive black hole with a mass about 18 million times that of the sun.
Scientists found that magnetars could boost the energy source of super-luminous supernovae, which are 10-100 times brighter than normal supernovae. Calculations suggest that rapidly spinning magnetars could power these extreme events.
Astronomers at UMass Amherst report the discovery of eight 'outrageously luminous' galaxies, which outshine previously brightest known galaxies. The newly observed galaxies are estimated to be about 10 billion years old and formed only 4 billion years after the Big Bang.
Astronomer Maxim Pshirkov discovered a new source of gamma-radiation in the Gamma Velorum binary system, confirming that colliding stellar winds generate high-energy photon emission. The system's strong stellar winds produce a photon flux with energies exceeding 100 MeV, detected by Fermi LAT.
Researchers discovered the most luminous supernova yet observed in an unusual host galaxy, providing insights into super-luminous supernovae. The record-breaking ASASSN-15lh was found to mimic hydrogen-poor SLSNe's behavior but with greater extremes, sparking speculation about its extraordinary emission.
The newly discovered super-luminous supernova, ASAS-SN-15lh, is the most luminous ever recorded, outshining the entire Milky Way galaxy. Its unusual characteristics challenge current theories on magnetar-powered explosions.
Researchers using NASA's Fermi Gamma-ray Space Telescope discovered a new gamma-ray pulsar in the Large Magellanic Cloud, breaking records for luminosity and age. The discovery was made after reanalyzing data from the telescope's Pass 8 process.
Researchers found strong outflows in ultra-luminous X-ray sources (ULXs), suggesting smaller black holes than expected. The team's observations shed light on ULXs and their impact on our understanding of supermassive black hole formation.
A Virginia Tech researcher has made a groundbreaking discovery about the origins of bioluminescence in millipedes. By studying a rare species that glows in the dark, he found that its early evolutionary role may have been related to antioxidant properties, not warning predators.
Two low-cost, car battery-sized Canadian nanosatellites are part of the BRITE-Constellation project, monitoring brightness and color variations of brightest stars. The satellites will uncover clues about star origins, including our Sun and Earth.
AAS meeting highlights four unusually bright galaxies, a galaxy cluster image, and sampling of galaxies thought to be responsible for most stars in the universe. These ultra-bright, young galaxies are forming stars approximately 50 times faster than our Milky Way galaxy.
A new study found that earthquake lights are more likely to occur on or near rift environments and adjacent to subvertical faults. The study analyzed 65 documented cases of earthquake lights, finding that 85% appeared spatially on or near rifts and 97% appeared adjacent to subvertical faults.
Astronomers observe a unique protostar, IRAS 20324+4057, shaped like a cosmic caterpillar due to intense ultraviolet radiation. The star is still collecting material from its surrounding gas envelope, which is being eroded by nearby stars.
Researchers have discovered a way to identify and explain the luminosity generated during common envelope events involving binary stars. The events result in bright red outbursts, similar to recently discovered Luminous Red Novae. Natalia Ivanova's analysis provided new insights into these celestial phenomena.
Researchers find two super-luminous supernovae at high redshifts, consistent with pair-instability supernova mechanism. The explosions are thought to have occurred in massive stars that formed in the early universe.
A new DNA sensor has been invented that can detect genetic material in minutes, potentially revolutionizing disease diagnosis. The Silver Nano Cluster DNA probe uses a luminous molecule to bind to specific targets, emitting light only when the target is present.