Articles tagged with Stellar Evolution
Researchers have discovered a globular cluster stellar stream in another galaxy, offering new insights into the nature of dark matter. The study demonstrates that these streams can be used to measure dark matter content beyond our own galaxy, opening doors to a broader understanding of its behavior.
Researchers observe star fragments plowing through surrounding gas, tracing the recycling process that supplies raw materials for new planets and stars. The study offers a glimpse into the potential fate of our Sun, which will shed its outer layers and return material to the Milky Way.
Astronomers have discovered the first globular cluster stellar stream outside the Milky Way, providing a powerful tool for studying dark matter. The study uses the stream's shape to reconstruct the galaxy's gravitational field and infer how dark matter shaped the stars' orbits.
The SDSS-V survey has released its twentieth public data release (DR20), providing a massive catalog of high-quality spectra of stars across the Milky Way. The dataset includes over two million total spectra, revealing temperatures, ages, and chemical compositions of stars.
Gravastars may form when a star collapses under its own mass, triggering the creation of a mini universe with dark energy. This equilibrium stabilizes the object, preventing it from becoming a black hole.
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.
Astronomers at UNC-Chapel Hill played a key role in identifying the source of mysterious long-period radio transients. The discovery of ASKAP J1745–5051, a binary star system containing a white dwarf and red dwarf companion, provides strong evidence for the origin of these unusual bursts of radio waves.
A team at the University of Arizona discovered exceptionally fast and powerful galactic winds from quasars a billion years after the Big Bang. These winds could have caused galaxies to lose gas supplies, effectively shutting down star formation. The study suggests that quasars with extreme outflows were more common in the early univers...
Researchers found our Sun joined a mass migration of similar stars 4-6 billion years ago, shedding light on galaxy evolution and the corotation barrier. The discovery reveals the time range over which the bar structure at the galactic center was formed.
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.
The team discovered a flat, spherical gas and dust structure resembling a diamond ring, formed by a massive star's radiation and winds. The 'Diamond Ring' is around 20 light years in diameter and shines strongly in infrared light.
New research reveals Pleiades star cluster as core of larger structure spanning 1,950 light-years, with similar ages and chemical compositions among its members. The study uses rotation-based approach to identify stars sharing origin story.
Recent JWST observations revealed a new population of astronomical objects, known as black hole stars, which are emitting light predominantly at longer wavelengths. These objects, located extremely far away, have raised questions about galaxy evolution and the formation of stars on a massive scale.
Astronomers discover stripped-down supernova with unusual chemical signature, providing evidence for the layered structure of stellar giants and unprecedented glimpse into a massive star's interior. The study reveals that stars can lose extensive material before exploding, challenging current theories on stellar evolution.
Researchers have discovered a rare white dwarf remnant with a carbon signature, suggesting it formed from the merger of two stars. The high-mass white dwarf, WD 0525+526, has a thin atmosphere that allows carbon to reach its surface, providing insights into the early stages of stellar evolution.
Research suggests that massive stars in the Small Magellanic Cloud are being pulled apart by the Large Magellanic Cloud. The discovery reveals a new pattern in stellar motion, which could transform our understanding of galaxy evolution and interactions.
A new study proposes a third category of galaxies: red star-forming. These galaxies produce low-mass stars and may have played a significant role in the universe's history. The findings could change our understanding of galaxy evolution, star formation, and the life cycle of galaxies.
A new study by UNSW Sydney researchers has discovered the sound frequencies of a cluster of stars 2700 light years away, allowing scientists to map the history of the Milky Way and other galaxies. The discovery uses oscillation frequencies to determine a star's age and mass, providing insights into galaxy formation and evolution.
The Flatiron Institute's Center for Computational Astrophysics is now supporting MESA's ongoing maintenance and development after its creator Bill Paxton steps down. The center has hired Philip Mocz as a full-time software engineer to ensure MESA's continued growth and impact in stellar physics.
The new DESI results show that the impact of dark energy may be weakening over time, suggesting a fundamental shift in how we think about dark energy. The collaboration's findings are consistent with other measurements, including supernovae and the light left over from the dawn of the universe.
New research reveals that exoplanets with masses similar to Jupiter formed much sooner than previously thought, suggesting the accretion process takes place early. This finding could lead scientists to re-evaluate and revamp their theories of planet formation for the solar system and elsewhere.
The discovery of a long-lived planet-forming disk around the star WISE J0446B reveals that disks can persist for three times longer than expected. The study provides new insights into planetary formation and the habitability of planets outside our solar system, particularly for low-mass stars.
A new collaboration between ASU, MSU, and LLNL aims to answer the question of how planets form by analyzing the atmospheres of seven young exoplanets. The team will use the James Webb Space Telescope and powerful computers to create atmospheric models that can reveal insights into planetary formation and evolution.
The ESO's VISTA telescope captures the colourful extravaganza of RCW 38, a young star cluster located 5500 light-years away. The image reveals vibrant pink hues from gas clouds and multi-coloured dots representing young stars.
Researchers identified a new process leading to formation of low-field magnetars, solving the mystery that puzzled scientists since their discovery in 2010. The team used advanced simulations to model magneto-thermal evolution of neutron stars, finding that a specific dynamo process can generate weaker magnetic fields.
A new study uses helioseismic techniques to provide an independent measurement of solar radiative opacity, confirming recent experimental results and revealing gaps in atomic physics understanding. The research improves stellar modeling accuracy, impacting galactic evolution and fusion energy research.
A team of astronomers has obtained detailed images of a small galaxy and its surroundings, revealing features typically associated with larger galaxies. The study found that the mechanisms fueling galaxy growth may be more universal than previously thought, suggesting that even dwarf galaxies can build stellar halos through accretion.
Astronomers discovered three ultra-faint dwarf galaxies in an isolated region of space, containing only very old stars. The findings support the theory that events in the early universe cut off star formation in small galaxies.
The Hubble Space Telescope has discovered a rare blue lurker star in the open cluster M67, which is spinning much faster than expected. The star's unusual behavior suggests it siphoned material from a companion star, leading to its high spin rate and unique evolutionary history as part of a triple-star system.
Researchers found a core-collapsing self-interacting dark matter subhalo is responsible for the peculiar spur and gap features observed in the GD-1 stellar stream. This discovery provides insights into the nature of dark matter itself and offers a new explanation for the observed perturbations.
A study of over 26,000 white dwarf stars confirmed that hotter stars are slightly larger due to higher temperatures. This finding brings scientists closer to understanding the effects of extreme gravity and potentially detecting dark matter particles.
Researchers have observed a rare metal-poor supernova, providing valuable information about the early universe. The study revealed that this supernova was distinct from others in nearby galaxies, with unique properties such as a steady brightness period and rapid spin.
The discovery provides a unique way to investigate the extreme phase of stellar evolution, bridging the gap between the earliest and final stages of binary star systems. This breakthrough could help explain cosmic events like supernova explosions and gravitational waves.
A groundbreaking study has provided a 3D view of the formation and evolution of globular clusters, revealing key differences in kinematic properties between multiple stellar populations. The research highlights that these ancient structures formed through multiple star formation events and provide constraints on their dynamical path.
Researchers have derived a new formula to estimate the maximum occurrence rate of Earth-like habitats (EHs) in the galaxy, concluding that these habitats are relatively rare. The investigation suggests that the probability of extraterrestrial intelligence is significantly rarer still.
The team observed an 'inside-out' growing galaxy in the early universe using the James Webb Space Telescope. This type of growth had been predicted by theoretical models but was never directly observed until now. The research found that the star formation activity is rising towards the outskirts, indicating a rapid growth rate.
Astronomers have discovered patterns of regularity within the chaotic three-body problem, which is a fundamental challenge in physics. The researcher's findings suggest that certain configurations of three massive objects can lead to predictable outcomes, offering new insights into astrophysics and the behavior of black holes.
A team of astronomers discovered new insights into the forces that shape protoplanetary disks using the James Webb Space Telescope. They traced disk winds in unprecedented detail, revealing an intricate structure and a pronounced central hole inside each cone-shaped envelope of winds.
Astronomers have discovered a 'weird' and unprecedented galaxy in the early Universe, with its gas outshining its stars. This phenomenon could provide clues about how galaxies evolved between the Big Bang and familiar galaxies.
ISTA's Lisa Bugnet, Alicia Michael, and Marco Mondelli have been awarded ERC Starting Grants to develop new methods for extracting information from data, studying gene regulation, and understanding time-keeping in cells. Their projects aim to simplify data analysis, accelerate personalized medicine, and uncover the secrets of biologica...
Astronomers at MIT and Penn State have discovered a new 'progenitor' of hot Jupiters, a highly eccentric planet with an orbit providing clues to its evolution. The planet, TIC 241249530 b, is expected to become a scorching hot Jupiter in about 1 billion years.
Astronomers have observed five young massive star clusters in the Cosmic Gems arc galaxy for the first time, revealing details about infant galaxies and globular cluster formation. The study uses gravitational lensing to resolve small scales in the distant galaxy, providing a unique window into the early Universe.
A new dataset from the VELOCE project has collected over 18,000 high-precision measurements of Cepheid radial velocities, providing insights into the structure and evolution of these stars. The data reveal complex patterns in pulsations that cannot be explained by traditional models, suggesting intricate processes within the stars.
Simulations reveal that dense molecular clouds can give birth to very massive stars that evolve into intermediate-mass black holes. The study provides new insights into the potential mechanisms of intermediate-mass black hole formation, which could have significant implications for our understanding of these enigmatic objects.
Researchers at China Institute of Atomic Energy have developed a more sensitive method to detect iron-60 in lunar samples, allowing for deeper understanding of cosmic events. The new technique has improved detection sensitivity better than 4.3 × 10−14 and potentially reaching 2.5 × 10−15.
A new study by the University of Essex suggests that watching online stars like Zoella and PewDiePie can be more emotionally fulfilling than talking to casual friends. The research found that parasocial relationships with YouTubers offer positive reinforcement, despite not being able to respond. People of all ages reported feeling a st...
Researchers at MIT have developed a new method to measure the spin of supermassive black holes by tracking the pattern of X-ray flashes produced during tidal disruption events. By analyzing the wobble of the accretion disk, they were able to determine that the nearby black hole was spinning at less than 25% the speed of light.
Scientists have discovered a new planet called WASP-193b that is 50% bigger than Jupiter yet has a density comparable to cotton candy. The planet's low density makes it an outlier among the over 5,400 planets discovered so far.
A new study using the James Webb Space Telescope found that the universe's early galaxies developed and matured much faster than previously believed. Almost 20% of disc galaxies observed had bar formations, indicating a more settled stage in galaxy evolution.
Researchers discovered a rare binary system with a magnetic massive star, surrounded by a beautiful nebula. The more massive star appears younger than its companion, suggesting a merger event that created the surrounding cloud.
A team of astrophysicists simulated models of stellar mergers and analyzed 59 early B-type blue supergiants in the Large Magellanic Cloud. The study found that mergers can reproduce the surface composition of a large fraction of the sample, suggesting they may be the dominant channel to produce blue supergiants.
A new study using the James Webb Space Telescope has captured the first-ever image of a planet-forming disk's gas dispersal, providing insights into how planets form in our solar system. The observations reveal that the inner disk of T Cha is evolving on very short timescales, differing from earlier spectra detected by Spitzer.
Researchers at Nagoya University discovered IVCs have lower heavy elements than previously reported, contradicting the Galactic Fountain Model. This finding suggests that particles in these clouds originated outside our galaxy, leading to new insights into galaxy evolution.
A study using machine learning classifies galaxy mergers and finds that mergers are not strongly associated with black-hole growth. Cold gas at the center of the host galaxy is necessary for rapid growth, suggesting a more complex relationship between galaxy evolution and supermassive black holes.
A team of 160 researchers from 60 institutions used supercomputers to simulate galaxy formation, correcting limitations and assumptions. The results show disc galaxies formed early in the Universe's history, solving the 'missing satellites problem'.
Scientists have discovered an Earth-sized planet in our solar backyard that may be similar to early Earth due to its proximity to the Sun and crowded system. The newly discovered planet was identified using the Transiting Exoplanet Survey Satellite (TESS) and is part of a young star system called the Ursa Major Moving Group.
Astronomers have found a direct link between massive star explosions and the formation of compact objects like black holes and neutron stars. The study used ESO's VLT and NTT to observe a supernova explosion in a nearby galaxy, revealing evidence for a compact remnant left behind.
Research by University of Leeds scientists has found evidence that massive Be stars may exist in triple systems, challenging current theories on their formation. The discovery could have significant impacts on our understanding of black holes, neutron stars, and gravitational wave sources.
A new computer simulation of the early universe aligns with JWST observations, showing no discrepancy with theoretical expectations. The 'Renaissance simulations' track dark matter clumps and galaxy formation, consistent with models that dictate cosmic physics.
A new approach using deep learning speeds up supernova simulation by 99%, enabling more accurate modeling of galaxy evolution. This breakthrough could also apply to climate and earthquake simulations, providing valuable insights into complex phenomena.