Articles tagged with Stars
Researchers with the NANOGrav collaboration have detected the gravitational wave background for the first time, revealing a perpetual chorus of ripples in space-time. The discovery is made possible by observing stars called pulsars that act as celestial metronomes.
Researchers from UNIGE have developed a new method to test the validity of Einstein and Euler's theories on the accelerating Universe expansion and dark matter. The study uses time distortion as a never-before-used measure, allowing for differentiation between the two equations.
Researchers mapped 39 interstellar clouds to understand high-mass star formation. They found over 800 stellar seeds that will evolve into stars, but only 1% have enough mass to become high-mass stars.
Astronomers have proposed a new method for measuring the distances of galaxies, utilizing double-period RR Lyrae (RR Lyr) stars. The study, published in Nature Astronomy, aims to improve the accuracy of distance measurements by leveraging the unique properties of these stars.
The latest DESI data release provides a precise 3D map of the universe with high certainty. The data also sheds new light on cosmic acceleration and the nature of gravity at large scales.
Researchers have discovered a large gas giant orbiting two stars using the radial velocities method for the first time. The newly found system, TOI-1338/BEBOP-1, is only the second binary star system known to host multiple planets ever confirmed.
Scientists observe a bright optical emission after the most powerful gamma-ray burst documented, providing detailed data on radiation across various wavebands. The study reveals that luminous phenomenon arises from high-energy charged particles in a rarefied medium with a powerful magnetic field.
Researchers found GRB 221009A's jet exhibited a narrow core with wide sloping wings, differing from standard jets. This unique structure may explain the event's extreme energy release and prolonged visibility.
Astrophysicists explain the Brightest of All Time (BOAT) cosmic explosion, revealing a narrow jet embedded within a wider gas outflow. The GRB's uniqueness was due to mixing between stellar material and the jet, masking characteristic signatures.
A new study has identified a chemically peculiar star in the Galactic halo as clear evidence of the existence of pair-instability supernovae (PISNe) from very massive first stars. The star's low sodium and cobalt abundances are consistent with predictions for primordial PISN from first-generation stars with 260 solar masses.
A team of astronomers using the James Webb Space Telescope has detected complex organic molecules in a galaxy over 12 billion light-years away. The discovery suggests that the presence of these molecules does not necessarily indicate star formation, contradicting a long-held assumption.
Researchers confirm Stephen Hawking's theory that black holes will eventually evaporate through Hawking radiation. New findings suggest gravity and spacetime curvature cause this radiation, affecting all large objects in the universe.
Astronomers at MIT and University of Wisconsin have discovered two validated planets, K2-416 b and K2-417 b, in Kepler's last week of high-quality data. The third planet candidate, EPIC 246251988 b, orbits its star every 10 days and is slightly farther away from Earth than the other two.
Astronomers have discovered an Earth-sized planet, LP 791-18d, with active volcanoes that could sustain an atmosphere, potentially allowing for liquid water and life. The planet's unique tidal locking creates a permanent day and night side, with the night side possibly experiencing condensation of water vapor.
A recent study published in Science found that tidal shocks can occur when a star collides with itself as it orbits a black hole. This discovery contradicts the current understanding of stellar matter evolution during Tidal Disruption Events (TDEs), which typically produce X-ray bright accretion disks.
A team of 995 undergraduate and graduate students analyzed 600 real solar flares, casting doubt on the theory that nanoflares heat up the sun's corona. The students' work provided a unique opportunity for early-career scientists to learn about collaborative research.
Researchers at Ohio State University found that the shells of galactic bubbles are more complex than previously thought, with unexpected temperature and chemical properties. The study suggests that these bubbles were formed by intense star-formation activity rather than supermassive black hole activity.
Scientists observe streams of intergalactic gas enriched with elements heavier than helium surrounding a massive galaxy. The findings suggest that the gas was recycled during earlier periods of star formation and is now fueling the galaxy's rapid growth.
A team of scientists at MIT and elsewhere have observed a star engulfing a nearby planet, a phenomenon that will also befall Earth in 5 billion years. The star's outburst was followed by a colder, longer-lasting signal, indicating the presence of gas from the star condensing into dust.
Scientists identify tidal disruption event at infrared wavelengths, revealing the closest example of a black hole devouring a star. The discovery suggests that conventional X-ray and optical surveys may have missed similar events in young, star-forming galaxies.
The SuperBIT telescope has begun capturing high-resolution images of the Universe on its first research flight. It is investigating the mystery of dark matter, which is thought to be made up of particles that can bounce off each other during galaxy collisions.
The James Webb Space Telescope has observed six galaxies that defy the standard model of cosmology, with masses billions of times that of our sun. These findings suggest alternative theories on galaxy formation and expansion rates shortly after the Big Bang.
The HERA team has improved the sensitivity of a radio telescope, allowing them to detect radio waves from the cosmic dawn era. The data suggests that early galaxies contained few elements besides hydrogen and helium, unlike modern galaxies.
Astronomers have discovered a massive, runaway black hole that has left behind a never-before-seen trail of newborn stars. The black hole, weighing as much as 20 million Suns, is plowing into gas to trigger new star formation along a narrow corridor.
A new study by EPFL researchers has calibrated the best cosmic yardsticks to unprecedented accuracy, further amplifying the Hubble tension. The Hubble constant is measured in kilometers per second per megaparsec and has puzzled astrophysicists and cosmologists worldwide.
The Swift Observatory team, led by Maia Williams, detected the brightest gamma-ray burst ever recorded, GRB 221009A. The burst was incredibly bright and had an afterglow that was more than 10 times brighter than any previous observation.
The study identifies five exoplanets that resemble Venus in terms of radii, masses, and atmospheric conditions. By observing these 'exo-Venus' planets using the James Webb Space Telescope, scientists hope to uncover valuable insights into Earth's future and the possibility of a runaway greenhouse climate.
Scientists have created a synthetic survey that showcases what can be expected from the Roman Space Telescope’s future observations. The simulation contains 33 million galaxies and 200,000 foreground stars, helping scientists plan observing strategies and test data analysis methods.
A recent experiment by UC Riverside astrophysicist Stephen Kane demonstrates that a terrestrial planet in this location would have disastrous effects on the solar system. The simulation found that such a planet could destabilize Earth's orbit, making it far less habitable and potentially ejecting Mercury and Venus from the solar system.
Researchers at Osaka Metropolitan University used AI to create a detailed map of star birthplaces in the Milky Way Galaxy. The team identified 140,000 molecular clouds and estimated their distance, size, and mass with high accuracy.
A rare quasar triplet formed a massive black hole with a mass of 10 billion solar masses, according to recent simulations. The triple system, composed of three galaxies with supermassive black holes at their centers, is believed to be the progenitor of ultra-massive black holes.
A team of astronomers discovered a spiral pattern in the disk around a high-mass protostar, indicating gravitational instability. The pattern revealed episodic growth bursts, a key aspect of high-mass star formation theory.
A team of scientists observed the dynamic formation process of interstellar gas clouds, revealing speeds of up to 20 km/s that compress gas into denser regions where massive stars form. The findings challenge previous assumptions of slow and quasi-static star formation processes in this region.
A team of researchers has discovered evidence of 'cosmological coupling' between black holes and the universe's expanding energy. By studying supermassive black holes in ancient galaxies, they found that these black holes gain mass over billions of years, matching predictions for black holes that cosmologically couple with vacuum energy.
Astronomers have cataloged over 51,863 Lyman-alpha-emitting galaxies, 123,891 star-forming galaxies, and 4,976 active galactic nuclei using HETDEX's spectroscopic data. The survey is a non-targeted, moon-sized survey that collects spectra from 35,000 fiber optic cables, providing a unique dataset for future galaxy mapping.
The James Webb Space Telescope has enabled the detection of compact structures of star clusters inside galaxies, known as clumps. Researchers have studied the link between clump formation and galaxy growth in distant galaxies, providing new insights into the early stages of galaxy formation.
Scientists discover first gamma-ray eclipses from spider star systems using Fermi data, calculating system tilt and pulsar mass. The discovery helps researchers measure pulsar masses, constraining physics within extreme environments.
Researchers utilized the James Webb Space Telescope to observe dense interstellar clouds, revealing a treasure trove of pristine ices from the early universe. The study provides new insights into chemical processes in one of the coldest places in the universe, offering clues on molecular origins and sulfur storage.
A worldwide Citizen Science project has collected data on light pollution over eleven years, revealing a faster decline in star visibility than previously thought. The rate of change is attributed to increased sky brightness, with dramatic consequences for stargazing and astronomy.
Researchers found that the stellar initial mass function varies with metallicity and age of stars, affecting galaxy formation and chemical enrichment estimates. The study used LAMOST telescope data to count red dwarf stars and measure their metallicity, revealing a variable abundance of low-mass stars in the Milky Way.
RIT Professor Roger Easton and his team used multispectral imaging to reveal detailed drawings on an ancient Greek palimpsest, reconstructing Hipparchus' Star Catalogue. The discovery showcases the technique's growing role in historical preservation, with RIT supporting locations across US and Europe.
Researchers detect radio signal from record-breaking distance galaxy, measuring gas composition and gaining insights into the early universe. The signal was amplified by a factor of 30 using gravitational lensing, allowing scientists to study a previously inaccessible region.
Researchers at Hokkaido University have discovered a new pathway to forming presolar grains, which could help scientists better understand the interstellar environment and develop more efficient nanoparticles. The study suggests that these grains formed through a non-classical nucleation pathway, involving three distinct steps.
Astronomers using Hubble observed a star's final moments as it was gobbled up by a black hole, creating a donut-shaped torus. The event provides forensic clues to the black hole homicide, with details on the debris's behavior and the accretion rate.
Researchers observed a sudden slowing of the star's angular momentum, followed by three Fast Radio Burst-like radio bursts and a month-long episode of pulsed radio emission. The synchronicity of these events suggests an association between magnetar spin-down glitches and radio emissions.
The Butterfly Nebula's unique shape is caused by a second star orbiting the central star, creating wing-like lobes. New research reveals powerful winds are altering the material within these lobes, contradicting existing models of planetary nebulae formation and evolution.
Researchers used the Panchromatic Hubble Andromeda Treasury Triangulum Extended Region — or PHATTER — survey to study the Triangulum galaxy. The team discovered two drastically different structures depending on the age of the stars, with younger and older stars having distinct distributions.
Researchers at the University of Washington have discovered a unique binary star system where a small companion star is surrounded by a large disk of dusty material. The companion star caused a seven-year-long eclipse of the main star, Gaia17bpp, which is one of the longest recorded eclipses.
Researchers have discovered a supernova with strong features of oxygen and magnesium, suggesting the explosion could be crashing into circumstellar matter formed around 1,000 days prior to the event. This finding provides new insights into the later stages of massive star life and creates challenges for current theories on star evolution.
Astronomers have discovered two ghostly Goliath black holes just 750 light-years apart, closing in on a cataclysmic meeting. The estimated population of merging supermassive black holes may be surprisingly high, generating strong gravitational waves detectable by future telescopes.
Researchers used variable stars as standard candles to measure galactic distances, tracing the outer limits of the Milky Way's halo. The study confirms theoretical estimates and provides a powerful tool for studying the galaxy's size and mass.
The Hubble Space Telescope has shed new light on the mystery of intracluster light, finding that these stars have been wandering around for billions of years. The survey suggests that these stars were already homeless in the early stages of the cluster's formation, and current theories cannot explain their origin.
Researchers at RIT have made a groundbreaking discovery confirming the light emitted by stars outside our galaxy is two to three times brighter than previously thought. This finding suggests a possible absence of optical light sources in the universe, potentially changing our understanding of how it formed over time.
Researchers found that 24% of surveyed red giants experienced structural discontinuities, affecting their oscillations and star's internal composition. The study aims to refine stellar models and uncover the history of the universe through detailed stellar fossil records.
Astronomers used the Webb Space Telescope's near-infrared camera to analyze images of the Cosmic Cliffs region in NGC 3324. The discovery reveals telltale signs from two dozen previously unseen young stars, with many appearing to be protostars that will eventually become low-mass stars like Earth's sun.
The James Webb Space Telescope has captured infrared images of a population of red spiral galaxies at unprecedented resolution, revealing their morphology in detail. These galaxies are among the farthest known spiral galaxies and suggest that such spiral galaxies existed in large numbers in the early universe.
An international team of researchers has successfully characterized the earliest galaxies in the Universe, which formed only 200 million years after the Big Bang. The study found that these early galaxies were relatively small and dim, processing less than 5% of their gas into stars.
Chinese astronomers have discovered that optical variability in emission-line galaxies (ELGs) is likely caused by star-formation activity rather than supermassive black holes. By analyzing images of ELGs from the COSMOS field, researchers found less than 3% show significant variability.
Astronomers have made the first-ever discovery of a rare cosmic 'lunch' involving a black hole devouring a nearby star and releasing relativistic jets further out into the universe. The event, AT2022cmc, was detected using a novel data-crunching method that quickly identified it in ZTF survey data.
Astronomers have detected the most distant black hole swallowing a star, with the event occurring one-third of its current age. The discovery was made using ESO's Very Large Telescope (VLT) and provides new insights into these extreme events.