Articles tagged with Neutron Stars
For the first time, astronomers believe they've spotted an afterglow from a kilonova, a phenomenon resulting from the merger of two neutron stars. The discovery was made using NASA's Chandra X-ray Observatory and has sparked debate over whether it's a kilonova or black hole-related X-rays.
Basudeb Dasgupta's study shows that collective oscillations can occur only if the spectra of two neutrino flavors cross over at some energy or emission angle. This result guarantees that observation of neutrino oscillation instabilities will reveal new information from deep within the star.
Researchers have discovered a source of fast radio bursts in the vicinity of galaxy M81, adding to the ongoing mystery surrounding these enigmatic events. The findings suggest that magnetars, highly magnetized neutron stars, may be responsible for generating FRBs, but further study is needed to fully understand this phenomenon.
Researchers discovered a compact object in supernova AT2018cow, which was a product of a dying star. The team found X-ray pulses indicating an object measuring no more than 1,000 kilometers wide and with a mass smaller than 800 suns.
Researchers have captured a 1,000-year-old supernova in 3D images, revealing unprecedented details about the elements ejected during a star's explosion. The study provides a three-dimensional map of these elements, shedding light on the conditions at the time of the explosion and the importance of asymmetries in supernovae.
Researchers used computer simulations to investigate the conversion rates of neutrons and protons in accretion disks surrounding black holes, finding that disks with masses between 0.01 to 0.1 solar masses are optimal for heavy element production. This suggests that neutron star mergers producing such disks could be the origin of a lar...
A team of Canadian researchers has successfully simulated baryons on a quantum computer, marking an important step towards more complex simulations. This breakthrough enables scientists to study neutron stars, the earliest moments of the universe, and the revolutionary potential of quantum computers.
Researchers at MIT and UNH find that binary neutron star mergers produce two to 100 times more heavy metals than neutron star-black hole mergers. The study suggests that binary neutron stars are a likely cosmic source for gold, platinum, and other heavy metals.
Researchers measured the alpha-proton reaction of magnesium-22, providing essential data for understanding X-ray burst light curves and environments. The new reaction rate was used to closely reproduce observed X-ray bursts, shedding light on the physics behind these events.
A new study by WMU Professor Michael Famiano and colleagues finds that high magnetic fields in neutron stars can alter the composition of ashes and affect electron capture rates. This discovery has significant implications for our understanding of stellar environments and the formation of elements.
Two independent research groups unveil new measurements to explain the birth of half the universe's elements. One group uses laboratory techniques to hunt for 'astromers,' while the other compares heavy elements in stars to better understand their origin.
The 2021 Fall Meeting of the APS Division of Nuclear Physics presents cutting-edge research on nuclear astrophysics, quantum technology, and rare isotopes. Researchers will discuss breakthroughs such as the most precise measurement of neutron lifetime and novel experiments measuring neutron skin in calcium.
Researchers have solved the 900-year-old mystery of the Chinese supernova of 1181AD by identifying a matching nebula and star in the Milky Way. The Pa30 nebula, surrounding Parker's Star, matches the profile, location, and age of the historic supernova.
New models of neutron stars show mountains only a fraction of millimetres high, contradicting previous estimates. The research used computational modelling to study the role of ultra-dense nuclear matter in supporting these tiny mountains.
Researchers discovered a new type of stellar explosion, electron-capture supernovae, which sheds light on the historic 1054 supernova and provides insights into the behavior of stars. The study focuses on the supernova SN2018zd, located in the galaxy NGC 2146, which has all the properties expected from an electron-capture supernova.
Scientists have detected black holes eating neutron stars for the first time, shedding light on the Universe's most extreme objects. The Laser Interferometer Gravitational-Wave Observatory (LIGO) and Virgo observatories captured the event, providing valuable insights into space and time.
Researchers confirmed detection of two rare events involving collision of black hole and neutron star, producing strong gravitational waves signals. The mergers involved massive objects with masses up to 9 solar masses and 1.9-solar-mass neutron stars, providing new information on binary systems and their properties.
The LIGO, Virgo, and KAGRA collaborations have detected gravitational waves from the merger of a black hole and a neutron star. Analysis reveals that the signals originated from two mixed binaries, each made up of a neutron star and a black hole, with masses consistent with these objects.
Researchers have detected two events of black holes merging with neutron stars, providing insights into their origins and merger rates. The findings will enable the drawing of conclusions about the host of astrophysical models of compact object formation and binary evolution.
Researchers have confirmed the existence of an elusive new type of stellar explosion, the electron-capture supernova. This discovery sheds light on a thousand-year-old mystery surrounding the 1054 AD supernova visible globally, now believed to be an electron-capture supernova.
A worldwide team of scientists has found evidence for a new type of stellar explosion - electron-capture supernovae. The discovery sheds new light on the thousand-year mystery of the supernova from A.D. 1054.
Astronomers use Hubble to pin five FRBs to host galaxies and identify their origins as young magnetar outbursts. The study provides new insights into the nature of these powerful events, which generate energy equivalent to the Sun's in a year.
Scientists used uGMRT to determine that AT 2018cow has an extremely patchy environment. The study provides the first observational evidence of inhomogeneous emission from an FBOT, which sheds light on its progenitor star's mass shedding rate and magnetic field strength.
A new simulation study led by UCL researchers suggests that studying black hole-neutron star collisions could provide a new measurement of the Universe's expansion rate, helping to resolve a long-standing dispute. The study found that instruments on Earth could detect ripples in space-time caused by up to 3,000 such collisions by 2030.
Researchers made a precise measurement of the lead nucleus's neutron skin, revealing it's thicker than expected. This thickness has implications for the physical processes in neutron stars and their size.
Astronomers have found powerful evidence for a neutrino-driven explosion in the remains of a supernova called Cassiopeia A (Cas A). The discovery was made using NASA's Chandra X-ray Observatory and suggests that titanium bubbles play a crucial role in driving the shock wave forward to trigger the supernova explosion.
Researchers at the University of Bath used resonance in spiraling neutron stars to measure symmetry energy, a key property of nuclear matter. This discovery sheds light on the fundamental workings of nuclei and offers insights into the forces that bind sub-atomic particles.
A new study advances a decisive test to investigate the origin of solar-mass black holes, which may be connected to dark matter. The research suggests that such black holes could have formed in the early Universe, contradicting conventional stellar evolution astrophysics.
A team of researchers used radioactivity in meteorites to study the cosmic origin of heaviest elements, shedding light on violent stellar explosions. The study found that specific astronomical events, such as neutron star collisions, likely created these heavy elements.
The latest observations from Insight-HXMT have discovered the origin of fast radio bursts (FRBs), revealing they come from soft-gamma repeater (SGR) J1935+2154, a magnetar in our Milky Way. This discovery resolves the longstanding puzzle concerning the origin of FRBs.
Astronomers used Hubble and Gaia data to analyze the positions and velocities of stars in NGC 6397, finding strong evidence for invisible mass in the dense central regions. The bulk of this unseen mass is likely made up of stellar-mass black holes, rather than white dwarfs or neutron stars.
Scientists at CASUS created an effective AI tool to describe the exotic state of warm dense matter. The new method uses neural networks to calculate properties like temperature and density, making it possible to interpret X-ray experiments with high accuracy.
A team of scientists has found evidence of alpha clusters in heavy nuclei, which challenges our understanding of neutron star structure and nuclear interactions. The discovery provides new insights into the process of alpha decay and has important implications for the study of neutron stars and their role in the universe.
Astronomers have traced the speedy shrapnel from a nearby supernova blast to calculate its location and time, yielding an estimated explosion age of 1,700 years ago. The researchers used NASA's Hubble Space Telescope and analyzed visible-light observations made 10 years apart.
Astronomers confirm that a recent burst of high-energy light was triggered by a magnetar located in a neighboring galaxy. The finding confirms long-held suspicions about the connection between gamma-ray bursts and magnetar activity.
Astronomers have detected a signature of magnetar outbursts in nearby galaxies, allowing for more precise localization and study of these extreme stars. The discovery provides new insights into the behavior of magnetars, which are thought to be the source of some types of short gamma-ray bursts.
Scientists discovered a rare magnetar in the Sculptor constellation as the source of giant gamma-ray burst GRB 200415A. The burst was powerful enough to disrupt mobile phone reception and shed light on the universe's early history.
Researchers used combined signals from binary neutron star mergers to study ultra-dense matter and constrain the Hubble constant. The analysis, led by Tim Dietrich, provided new insights into neutron star equation of state and expansion rate of the Universe.
Researchers at TUM have developed a method to precisely measure the strong interaction between stable and unstable particles, shedding light on atomic nuclei and neutron stars. The breakthrough enables high-precision studies of the dynamics of the strong force.
Astronomers detected near-infrared emission 10 times brighter than predicted, challenging conventional theories of short gamma-ray bursts. The observations suggest the possibility of a massive magnetar being formed after the merger of two neutron stars.
Researchers spot potential magnetar birth from neutron star merger, which resulted in a brilliant kilonova, the brightest ever seen. The team's findings challenge conventional thinking and offer insights into the physics behind extreme energy explosions.
Computer simulations show that neutron star mergers can lead to black hole formation under specific conditions. The threshold mass for collapse depends on the properties of dense nuclear matter.
A team of Canadian astronomers detected an intense radio burst from a nearby magnetar, lending weight to the theory that magnetars are behind at least some fast radio bursts. The findings suggest that magnetars could be responsible for some FRBs, but further research is needed to confirm this.
Researchers found X-rays continuing to radiate from the collision long after models predicted they would stop. The study suggests possible explanations for the long-lived X-ray emissions, including a new feature of the collision's afterglow or the presence of a remnant neutron star.
Astrophysicists identify distinctive signatures of stellar-mass black holes in archival X-ray data, separating them from neutron stars. This is the strongest steady signature of stellar-mass black holes to date.
A new analysis of galaxy evolution finds that neutron star collisions do not create the quantity of chemical elements previously assumed. Instead, an entirely different sort of stellar phenomenon - unusual supernovae with strong magnetic fields - is responsible for making most of the heavy elements, including gold.
A team of researchers found that unequal neutron-star mergers can create an electromagnetic signal, which could be detected using gravitational-wave detectors like LIGO. The simulations revealed that the larger star tears apart its partner, creating a slower merger and allowing an 'electromagnetic bang' to escape.
Dien Nguyen investigates nucleon interactions at short distances in both heavy and light nuclei during her fellowship. Her research will expand on previous findings, providing insights into neutron stars and the behavior of protons and neutrons inside atomic nuclei.
The Gemini Observatory has detected a distant short gamma-ray burst (SGRB) with an optical afterglow, providing new insights into the merger of two neutron stars. The observation, made just hours after the burst's detection, revealed the SGRB's distance and placed it in the epoch of cosmic high noon.
A Northwestern University-led team discovered the most distant short gamma ray burst (SGRB) with its afterglow measured, located 10 billion light-years away and 3.8 billion years after the Big Bang. The study reveals that neutron stars in a 'teenage' universe may have merged relatively quickly.
Scientists have detected an object of 2.6 solar masses, firmly placing it within the 'mass gap' between neutron stars and black holes. The discovery was made using LIGO and Virgo detectors and may challenge current theoretical models.
Researchers have developed a method to detect the presence of weak gravitational wave events, revealing a lost 8 billion light years of universe evolution. This breakthrough will allow scientists to observe farther away in space-time and gain insights into the early universe's structure.
A team of astronomers has detected a periodic pattern of fast radio bursts from an unknown source outside our galaxy, 500 million light years away. The pattern repeats every 16 days and is the most definitive one seen from a FRB source, offering a clue to the physics behind these intense flashes of radio waves.
A four-year study at Jodrell Bank Observatory reveals a repeating Fast Radio Burst (FRB) follows a cyclic pattern with radio bursts observed every 90 days, followed by a silent period of 67 days, repeating every 157 days. This discovery provides an important clue to identifying the origin of FRBs.
Researchers from the University of Helsinki have found strong evidence for the presence of exotic quark matter inside the cores of the largest neutron stars in existence. The new results were published in Nature Physics and combined recent findings from theoretical particle and nuclear physics with astrophysical measurements.
Astronomers have identified a new class of cosmic explosions, dubbed fast blue optical transients (FBOTs), which produce the fastest and heaviest outflows ever recorded. The newly discovered object, CSS161010, has surpassed the famous AT2018COW in speed and mass ejected during its event.
Researchers have developed a new model that enables direct measurement of vibrations inside neutron stars from gravitational-wave signals. This will provide fresh insights into the fundamental nature and composition of these mysterious objects, unlocking new avenues for studying extremely dense nuclear matter.
Researchers discovered black hole-neutron star mergers in globular star clusters can be detected using computer simulations. The study offers critical insights into the fusion of massive stellar objects, with potential implications for gravitational wave detection.
Physicists at Goethe University Frankfurt simulated merging neutron stars, predicting a clear signature of quark-gluon plasma in gravitational waves. This finding could provide evidence for the existence of the quark-gluon plasma in the present universe.
The National Science Foundation has awarded a $440,000 grant to Rochester Institute of Technology researchers to develop the Einstein Toolkit for simulating black holes, neutron stars, and other astrophysical phenomena. The toolkit will be scaled up to handle exascale-level resources on large supercomputers.