A team of astronomers using Gaia data found twenty high-velocity stars racing towards the Galactic centre, raising questions about their origin. The stars' velocities could be a sign of supermassive black holes or binary systems in nearby galaxies.
Researchers used Kepler spacecraft to monitor stellar oscillations of 40 Sun-like stars, finding signs of differential rotation in some. The equators spin nearly twice as fast as mid-latitudes in the strongest signals, posing a challenge to existing theories.
Researchers at NYU Abu Dhabi used NASA's Kepler mission and asteroseismology to determine precise rotational patterns of Sun-like stars, challenging current science on stellar rotation. They found that equatorial regions spin up to two and a half times faster than mid- to high latitudes.
Researchers suggest the Large Magellanic Cloud may have engulfed a third luminous galaxy, explaining why stars in the cloud rotate at different rates. This phenomenon could also help explain the 'age-gap' problem observed in the cloud, where there are very old and young star clusters.
Astronomers are probing the mystery of how galaxies stop forming stars by studying a class of galaxies known as 'self-quenching' galaxies. These galaxies have gas being blown out at incredible speeds, but without evidence of black hole activity, suggesting alternative mechanisms may be at play.
Calculations by Masafumi Noguchi confirm two-stage formation of Milky Way stars, with iron-rich stars forming after a gap in star birth. This discovery sheds light on the galaxy's dramatic history and provides insights into its formation.
Researchers found that a small fraction of protons in neutron-dense objects significantly impact their stiffness, mass-to-size ratio, and cooling process. Protons are believed to determine several properties of the star due to their high energy content.
Researchers found that in neutron-rich objects, protons carry a disproportionate part of the average energy, moving faster than neutrons. The team analyzed data from CLAS experiments and observed a significant increase in the probability of protons having high energies as the number of neutrons increased.
Astronomers using NASA's NuSTAR satellite have revealed that binary star system Eta Carinae is capable of creating cosmic rays. The team observed the system and found evidence of a collision between the two stars' stellar winds, which forms shock waves and accelerates particles to nearly the speed of light.
Astronomers at Georgia State University have discovered a thin gap on the Hertzsprung-Russell Diagram, indicating where stars transition from being larger and mostly convective to smaller and fully convective. This finding reveals information about the interior structures of low-mass stars in the Milky Way Galaxy.
Researchers have developed a new IR instrument to search for potentially habitable planets around small red dwarf stars. The instrument, IRD, uses advanced technology to measure the line-of-sight movement of stars and detect planets with high accuracy.
Researchers set limits on neutron star sizes by analyzing billions of theoretical models, refining estimates to within 1.5 kilometers. The study also explores the possibility of 'twin stars' with exotic properties, which are statistically rare and unlikely to be deformed during mergers.
A team of astrophysicists propose a new model for the formation of globular clusters and supermassive stars. They suggest that a runaway collision process between densely packed stars in globular clusters could form a supermassive star, explaining the unusual chemical elements found in these clusters.
Researchers confirmed that last fall's union of two neutron stars caused a short gamma-ray burst, revealing a key relationship between binary neutron star mergers, gravitational waves and GRBs. Short gamma-ray bursts are the universe's most powerful electromagnetic events.
Researchers found relics of merger events in the Milky Way halo using Gaia Data Release 2. Five small clusters and a large 'blob' of stars indicate massive and smaller merger events shaped the galaxy. This study provides insights into the Milky Way's evolution, with further analysis to reveal more about its formation.
Using a pioneering method, researchers discovered a massive neutron star with a mass of approximately 2.3 Solar masses. This discovery challenges the previous understanding of neutron star masses and opens new avenues for studying these extreme objects.
A team of scientists used ALMA to investigate the proportion of massive stars in four distant gas-rich starburst galaxies. The study found that these galaxies have a much higher proportion of massive stars than expected, with some stars having birth masses up to 300 solar masses.
Researchers observed radio waves to measure carbon monoxide gas in distant galaxies, revealing that stars born during intense starbursts are massive. The findings challenge classical ideas about star formation and galaxy evolution over cosmic time.
New research led by the University of Warwick has found that globular clusters may be only around 9 billion years old, revised from their previous age of 13 billion. The discovery brings into question current theories on how galaxies, including the Milky Way, were formed.
A new map for a birthplace of stars provides unprecedented detail of the structure of the Orion A molecular cloud. The maps will help researchers calibrate star formation models for extragalactic studies and better understand how fast and efficiently stars form in the region.
A team of international astronomers has detected oxygen in a galaxy 13.28 billion light-years away, revealing that stars formed at an unexpectedly early stage in the universe's history. The discovery provides insight into the formation of galaxies and sheds light on the 'cosmic dawn' era.
Researchers have observed stronger-than-binary correlations in quantum mechanics for the first time, utilizing three-dimensional entangled photon sources. The experiment, conducted 8 meters apart, demonstrates the existence of such correlations, which could lead to a deeper understanding of fundamental problems in quantum theory.
A team of researchers detected two distinct sequences of blue straggler stars in a young globular cluster, NGC 2173, using the Hubble Space Telescope. This finding challenges the generality of explanations for similar blue straggler sequences and presents unexpected observational results.
A study using ALMA found a surprising distribution of star-forming cores, with fewer massive stars and more solar-mass stars than expected. This discovery may require reevaluation of the relationship between core mass and star mass.
The James Webb Space Telescope has the potential to observe the first stars in the universe, which formed about 200-400 million years after the Big Bang. The telescope can capture light from single stars with a massive amount of gravitational lensing, amplifying it up to 10,000 times.
Researchers from ITMO University have discovered a new mechanism for neutron star radio emission, based on the transitions of particles between gravitational states. This phenomenon is similar to laser amplification and was first observed in electrons on the surface of neutron stars, consistent with real experimental observations.
A new international study has found that galaxies grow bigger and more ordered with age, with stars moving in all directions. The research team measured the movement of stars in 843 galaxies using an instrument called SAMI on the Anglo-Australian Telescope.
Astronomers have revealed the 'DNA' of over 340,000 stars in the Milky Way, tracing their ancestry and composition. The GALAH survey aims to make DNA matches between stars to find long-lost sisters and brothers of the Sun.
Planets in short-period binary star systems are at risk of being ejected due to tidal forces, which slow down stellar rotations and expand orbital periods. This process removes at least one planet in 87% of multiplanet circumbinary systems, making them less suitable for habitability studies
Astronomers found intense X-ray radiation from red dwarf stars can strip away a planet's ozone layer, making it uninhabitable. This means that life on land might only survive in the oceans.
A team of astronomers has found that galaxies like the Milky Way are slowly increasing in size due to star formation on their outskirts. The study, led by Cristina Martínez-Lombilla, reveals a growth rate of around 500 meters per second, which is fast enough to cover the distance from Liverpool to London in about twelve minutes.
A new age-map of the Milky Way's center shows that a period of star formation lasting around 4 billion years created the complex structure. The map, produced by an international team, combines data from millions of stars and spectroscopic surveys, revealing that the bar-shaped structure was formed about 7 billion years ago.
New research confirms that 'Oumuamua, the first confirmed interstellar asteroid, originated from a binary star system. The study found that rocky objects like 'Oumuamua are far more likely to come from binary systems than single star systems.
Astronomers have discovered that all galaxies rotate at the same rate, with a sharp edge containing older stars, gas, and young stars. This regularity helps understand galaxy mechanics, enabling more efficient observations and reduced processing power.
Researchers using a unique radio antenna detected a clear signal from the earliest stars in the universe, revealing the formation of these massive, blue, and short-lived stars within 180 million years of the Big Bang. The discovery provides new insights into the early universe's mysteries and potential connections to dark matter.
A team of astronomers discovered that some stars in the Galactic halo are former residents of the Galactic disk, kicked out by invading dwarf galaxies. This finding confirms a new understanding of the Milky Way's history and future, revealing a complex interplay between galaxy interactions.
Researchers found that the chemical compositions of halo stars match those of outer disk stars, suggesting they originated from the galaxy's own disk. This discovery reveals a more complex dynamics of the Milky Way, indicating that groups of stars in the disk can be relocated to distant realms within the galaxy.
Researchers have identified a fourth ULX as a neutron star, shedding new light on how these objects can shine so brightly. The study found unusual dip in the ULX's light spectrum attributed to cyclotron resonance scattering, revealing strong magnetic fields around the neutron star.
Astronomers discover halo structures in Milky Way, finding chemical compositions matching those of the Galactic disk. Theories suggest oscillations of the disk as a whole may have relocated these stars to extreme positions.
Researchers used spectroscopic measurements to confirm S0-2 has no significant companion, simplifying the upcoming gravity test. The discovery sheds light on the formation of young stars near the supermassive black hole at the center of the Milky Way galaxy.
Researchers predict characteristic light signals from supermassive black holes before merger using multimessenger astrophysics. The study simulates binary black hole collisions and provides insights into electromagnetic signals accompanying gravitational waves.
Researchers at the IAC have identified a star with minimal heavy elements, providing insights into the formation of the Galaxy's first chemical elements. The star, located 7,500 light years from Earth, has a surface temperature of 400 degrees hotter than the Sun.
The study reveals that massive stars are much more abundant than previously thought, with a significant fraction of stellar mass in high-mass stars. The research has far-reaching consequences for the understanding of our cosmos, including an estimated 70% increase in supernovae and 200% increase in chemical yields.
A team of scientists has solved a puzzle in astrochemistry by developing a way to measure magnetic fields in space using methanol. The new method, published in Nature Astronomy, gives astronomers a new tool to investigate how massive stars form.
An international team of astrophysicists has provided the first clue to the speed of dark matter, finding that it matches the movement of the least heavy metal-rich stars. This breakthrough could help shed light on why direct detection experiments have failed to detect dark matter particles.
Astrophysicists have determined that the maximum mass of neutron stars cannot exceed 2.16 solar masses through a combination of theoretical and observational research. The result was achieved by applying universal relations to data on gravitational-wave signals and electromagnetic radiation from merging neutron star events.
The Star-Planet Activity Research CubeSat (SPARCS) mission aims to monitor the flares and sunspots of small, cool stars, known as M dwarfs, to assess their habitability for planets. The spacecraft will use ultraviolet-sensitive detectors to study how stellar activity affects planetary environments.
The discovery of eleven new stellar streams in the Milky Way confirms its role as a cosmic melting pot, with stars originating from other galaxies. The Dark Energy Survey data, made publicly available, enabled the detection of these streams, which provide evidence for the galaxy's history of migration events.
Researchers found supermassive black holes prevent star formation in smaller galaxies by driving powerful winds that heat gas, quenching the process. This discovery sheds light on how dwarf galaxies, composed of up to 100 million stars, evolve and affects our understanding of galaxy evolution.
Observations of a nearby star-forming region have revealed that large stars are more prevalent than predicted by models. The study found that there were many more stars at high masses, with a top-heavy initial mass function expected to generate exotic objects like black holes and neutron stars.
An international team has discovered an 'astonishing' overabundance of massive stars in the Large Magellanic Cloud galaxy. The study used detailed analyses of nearly 1,000 massive stars to determine their distribution, revealing that massive stars are much more abundant than previously thought.
Japanese researchers developed a novel phase-field model to study phase separation in binary mixtures within porous materials. The model revealed a clear relationship between demixing and wetness, influenced by the topology of the pore structure.
Astronomers have developed a novel method to measure the masses of solitary stars with an accuracy of 10-25 percent. This technique combines light fluctuations and parallax data to infer surface gravity and diameter, providing critical information for understanding star formation, evolution, and planetary systems.
Astronomers measured the magnetic field of a black hole in a binary system using data from a sudden flare. The field was found to be substantially weaker than expected, providing new insights into how black holes consume material.
A team of scientists used computer simulations based on recent observations to determine the radius of neutron stars. The calculations suggest a minimum radius of 10.7 km for these dense objects.
Astronomers have discovered eleven low-mass protostars forming close to the Milky Way's supermassive black hole, defying predictions of hostile environment. These newly formed stars are about 6,000 years old and represent the earliest phase of star formation in this highly turbulent region.
Researchers found a strong inverse relation between magnetic field strength and star formation rate in molecular cloud complexes. This suggests that magnetic fields slow down or stop the collapse of gas clouds to form stars, leading to fewer massive stars in galaxy centers.
Researchers combined Hubble and Gaia data to measure the proper motion of 15 stars in the Sculptor Galaxy, revealing an unexpected preference in direction. The findings question current models of dark matter halos, suggesting that assumptions on star populations may be invalid.
A team of astronomers from Georgia State University has discovered two old binary stars and identified 29 new old star candidates using a technique called astrometry. The study focused on subdwarf stars, which are cooler and older than the sun, and used their motion across the sky to determine their age.
Scientists have observed a contracting white dwarf for the first time, providing insights into young stars' evolution. The discovery suggests that young white dwarfs contract as they age, challenging current understanding of their behavior.