Articles tagged with Stellar Physics
Researchers have discovered unique electromagnetic signals in the debris of a neutron star merger, which could provide new constraints on axion-like particles and their potential role in dark matter. The findings were made using data from NASA's Fermi-LAT gamma-ray telescope.
Researchers have discovered a unique signature of planetary material ingestion on the surface of a white dwarf star, WD 0816-310. The team observed a concentration of metals imprinted on the star's surface, indicating that the magnetic field played a key role in this process.
Researchers visualize second sound, a wave-like movement of heat, independent of physical particle motion in a superfluid. The findings expand understanding of heat flow in superconductors and neutron stars.
Researchers from Lehigh University have successfully mapped 15 orphaned stars to their birth clusters in the Milky Way using Gaia Mission data. The study provides new insights into the galaxy's history and star cluster dynamics.
A new unified model confirms that some long-lasting gamma-ray bursts are created in the aftermath of cosmic mergers that spawn an infant black hole surrounded by a giant disk of natal material. The findings explain recently observed long GRBs that astronomers couldn't link to collapsing stars.
Researchers have created a three-dimensional computer simulation of the light emitted following a neutron star merger, producing results similar to an observed kilonova. The simulation takes into account various processes and material interactions, enabling predictions for any viewing direction.
Astronomers have created the first computer simulations showing how convection in the cores of massive stars generates waves that result in flickering starlight. The effect is different from the visible twinkling of stars in the night sky and could be observed with improved telescopes.
Astrophysicists analyze James Webb Space Telescope images to find three bright objects that might be 'dark stars,' powering themselves with annihilating particles of dark matter. The discovery could reveal the nature of dark matter and solve the puzzle of galaxy formation.
The IceCube Neutrino Observatory has produced an image of the Milky Way using neutrinos, revealing it is a neutrino desert. The observation suggests the galaxy produces significantly fewer high-energy neutrinos than distant galaxies.
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.
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.
A UTSA-led research team has discovered a new exoplanet using indirect methods. The exoplanet, HIP 99770 b, is about 14 to 16 times the mass of Jupiter and orbits a nearly twice-as-massive star. This breakthrough opens a new avenue for scientists to discover and characterize exoplanets.
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.
Researchers found that kilonovae, caused by neutron star collisions, produce spherical explosions with symmetrical shapes. The discovery may provide a new key to fundamental physics and measuring the Universe's age.
A study published in Nature Astronomy suggests that a volcano-like rupture on the surface of a neutron star could have caused its sudden slowdown. The research used X-ray data from orbiting telescopes to analyze the magnetar's rotation and found evidence supporting this theory.
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 have detected intra-group light, a faint glow between distant galaxies, and studied its properties. The stars in this light are younger and less metal-rich than surrounding galaxies, suggesting they were stripped from their home galaxies by massive satellite galaxies.
Researchers Konstanze Zwintz and Thomas Steindl develop new model to study pre-main sequence stars, shedding light on their early formation and its effects on stellar evolution. The model improves understanding of the chaotic phase of star birth and its impact on oscillation behavior.
Researchers propose using precision data from upcoming experiments to test the cosmological collider effect and unravel the mystery of matter's origin. They suggest that leptogenesis, a well-known mechanism, could be used to explain the imbalance between matter and antimatter in the early universe.
Astronomers have found that denser and more turbulent environments tend to form binary/multiple stellar systems. The study used the James Clerk Maxwell Telescope and Atacama Large Millimeter/submillimeter Array to analyze the Orion Cloud complex, revealing that about 13 dense cores are giving birth to binary/multiple stars.
Astronomer Frank Kiwy uses Astro Data Lab to discover 34 new ultracool dwarf binary systems in the Sun's neighborhood, expanding knowledge of brown dwarfs and their companions. The discovery nearly doubles previously known samples, shedding light on how often brown dwarfs have companions.
Researchers found that planetary systems around binary stars form differently than those around single stars, potentially creating new targets for extraterrestrial life. The study also suggests that comets could play a key role in delivering organic molecules necessary for life.
The Event Horizon Telescope (EHT) has captured the first image of Sagittarius A*, a black hole at the center of the Milky Way, revealing a ring-like structure and shadow. The observation confirms Einstein's theory of general relativity and provides new insights into giant black holes.
Astronomers have identified a nearby Sun-like star that has paused its own cycles and entered a similar period of rare starspots, sparking hope for understanding the Sun's 70-year Maunder Minimum. Continued observation could provide crucial insights into the Sun's stellar magnetic activity, potentially affecting climate on Earth.
A team of astronomers discovered an unusual massive cluster of young galaxies forming in the early universe. The newly found growing galactic metropolis, MAGAZ3NE J0959, consists of at least 38 member galaxies and is about 11.8 billion light-years away from Earth.
Astronomers have discovered a binary system consisting of a rapidly spinning neutron star and the precursor to an extremely-low-mass white dwarf, dubbed a 'cosmic spider'. The system emits powerful gamma-rays and has been observed using the SOAR Telescope in Chile.
A team of international researchers challenged Einstein's theory of general relativity using pulsars as a cosmic laboratory. They detected new relativistic effects, including light deflection and time dilation, with unprecedented precision. The study provides significant insights into gravity theories and the fundamental forces of nature.
Astronomers observed a young, sun-like star ejecting a massive burst of energy and charged particles, potentially bad news for satellites and power grids. The study suggests that similar events could have shaped planets like Earth and Mars over billions of years.
New astronomical models suggest the Magellanic Stream could be just 20 kiloparsecs from Earth, potentially colliding with the Milky Way and fueling new star formation. The revised distance may also affect estimates of the stream's mass and density, which could require revision.
A new study reveals how supernovae explosions of massive stars can form heavy neutron star binaries, resolving a puzzle from gravitational wave observatories LIGO and Virgo. The team's results show that the explosion energy determines whether a stripped star forms a neutron star or black hole.
A new study published in Monthly Notices of the Royal Astronomical Society found that superflares on red dwarf stars occur at high latitudes, near the star's poles, which means they are not directed towards orbiting exoplanets. This reduces the danger to planetary atmospheres and habitability.
Astronomers have found a strange dismembered star cluster at the galaxy's edge, with lower quantities of heavier elements than other globular clusters. The discovery poses significant problems for current ideas on globular cluster origins.
Researchers at George Mason University received $6,200 from NASA's Goddard Space Flight Center to develop science and technical requirements for the ORCAS mission. As part of the project, an undergraduate student will assist in exoplanet science case development.
Researchers at RHIC have made precision measurements of hypertriton and antihypertriton binding energy and mass, shedding light on symmetry violations in neutron stars. The results could have significant implications for understanding astrophysical phenomena involving strange quarks.
Science communicators will share unique approaches to engage the public through popular culture, including NASCAR and Star Wars. They aim to bridge the divide between science and the general public by making physics more relatable and accessible.
Scientists at ORNL solved a 50-year-old puzzle explaining why beta decays are slower than expected by including subtle effects in theoretical models. The team used ORNL's Titan supercomputer to simulate tin-100 decay into indium-100, demonstrating increased confidence in computing nuclear processes.
Marialis Rosario-Franco, a UTA doctoral student, has been awarded the Gröte Reber Doctoral Fellowship to study exomoons in four-body systems and their potential detection by modern radio telescopes. The fellowship allows her to conduct observational research at the NRAO's Very Large Array and Long Wavelength Array.
Narlikar shares personal reminiscences on the evolution of cosmology over six decades, highlighting the increase in confidence in the standard model. However, he also notes that this model lacks independent observational support and an established theoretical base.
Scientists measured a time delay of 100 milli-seconds between X-rays and optical flashes from the jet emitted by V404 Cygni's black hole. This delay indicates the inner acceleration zone in the jet is approximately 30,000 kilometers away from the event horizon.
Nuclear physicists at Brookhaven National Laboratory's STAR detector have revealed new details about the fundamental particles that make up our world. They found more heavy particles emerging from the fat part of a collision, indicating that heavy particles get caught up in the flow of quark-gluon plasma.
Aging stars stop slowing down as their magnetic field interacts with a wind of particles flowing away from its surface, according to research published in Nature. This discovery challenges previous theories on stellar rotation and has implications for understanding how the Sun influences its local environment, including planets.
Researchers use the Very Large Telescope Interferometer to study a young star with a large proto-planetary disk. They find a significant gap in the inner regions, suggesting a gravitational influence from forming planets.
A Queen's University PhD student is conducting the first systematic population study of magnetosphere-host stars, finding that plasma density within all such magnetospheres is far lower than predicted. This suggests that plasma might be escaping gradually, maintaining magnetospheres in an essentially steady state.
Researchers found that the magnetic field of a neutron star takes on a stable structure and evolution slows down, challenging previous theoretical models. The discovery could help scientists measure neutron star properties and gain insights into matter at extreme densities.
Renowned physicist Lawrence Krauss believes science fiction is not a match for reality. He argues that science fiction often fails to capture the complexity of scientific discoveries. Meanwhile, Krauss suggests exploring real-world applications of science fiction concepts, such as warp drive and teleportation, which may be possible in ...
A University of Alberta physicist collaborated with amateur astronomers to confirm the periodic bursts of light from a binary star, SS Cygni, 370 light years away. The team re-examined an established theory and confirmed its accuracy using data from ground-based radio telescopes and optical observations.
Using Star Trek's advanced technologies as a gateway to explore fundamental physics concepts, ASU Professor Lawrence Krauss engages lay audiences and sparks their interest in science. He examines the feasibility of phenomena like wormholes, warp drives, and time travel within our current understanding of physics.
A laboratory experiment has successfully modeled stellar jets, revealing that magnetic forces shape these objects in a non-linear way. The findings suggest that the jets are fired out like bullets or buckshot, rather than breaking into pieces as previously thought.
Rice University is leading an international team in building a cylindrical bank of over 23,000 particle detectors for the Solenoidal Tracker at RHIC. The collaboration, valued at $7 million, demonstrates robust scientific cooperation between US and Chinese institutions.
The US Physics Olympiad team consists of 24 high school students from 14 different states who were selected to compete in the International Physics Olympiad. The team will undergo a week-long physics 'boot camp' and attend lectures by prominent scientists before traveling to Taipei, Taiwan for the competition.
Lawrence Schulman proposes a new scientific spin on science fiction, suggesting the possibility of reverse arrow systems where broken eggs re-form and timeline runs backwards. He uses statistical computer modeling to show that such systems could exist in regions with dark matter.
Lawrence Krauss, a prominent astrophysicist, has won the AAAS Public Understanding of Science and Technology Award for his efforts to improve communication between scientists and the public. His work aims to promote scientific literacy and critical thinking, particularly in addressing creationism in public schools.
Anthony Leggett, a professor of physics at the University of Illinois, has been named an Honorary Fellow of the Institute of Physics. He was recognized for his fundamental contributions to theory of superfluidity in helium-3 and quantum mechanics of macroscopic systems.
A team of astronomers has developed a 3-D globe-like image of the Helix nebula, allowing them to inspect it from all sides. The image reveals evidence that the nebula behaves like a double-headed garden sprinkler, with each side ejecting gas at similar structures.
Scientists successfully converted energy in the form of light into matter, creating electrons and positrons. The experiment used high-energy electrons and photons to produce an incredible amount of power in a tiny area, marking a major breakthrough in understanding quantum electrodynamics.
Researchers found an unexpected orientation in space, measured through light polarization from distant galaxies. The 'corkscrew effect' indicates a universal axis that orients the universe.