Articles tagged with Pulsars
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The LAXPC instrument has observed various astrophysical objects, including Black hole X-ray binaries, Microquasars, and Supernova remnants. Its large detection volume and efficient xenon gas filling result in high detection efficiency above 30 keV.
Researchers analyzed 700 hours of archival data to discover a burst of radio waves from six billion light years away. The region of space it came from was highly magnetized, suggesting it could be related to a supernova or nebula forming new stars.
Researchers using NASA's Fermi Gamma-ray Space Telescope discovered a new gamma-ray pulsar in the Large Magellanic Cloud, breaking records for luminosity and age. The discovery was made after reanalyzing data from the telescope's Pass 8 process.
Researchers at the University of Southampton have developed a new method for measuring the mass of pulsars, highly magnetised rotating neutron stars. This breakthrough technique relies on principles of nuclear physics and can be used to measure the mass of young pulsars in isolation.
Scientists used Parkes telescope for 11 years to detect gravitational waves but found nothing, suggesting that black holes may merge quickly without generating waves. The lack of detection has implications for astronomers who want to use pulsar timing techniques to spot gravitational waves.
Scientists will observe the event from radio wavelengths to gamma rays, measuring the massive star's gravity and magnetic field. The pulsar's passage through the disk will trigger astrophysical fireworks, providing a probe for studying the system.
The High Energy Stereoscopic System (H.E.S.S.) has detected three powerful gamma-ray sources in the Large Magellanic Cloud, including a pulsar wind nebula and a supernova remnant. These discoveries provide new insights into the formation of cosmic structures and the evolution of galaxies.
Researchers tracked the motion of a binary pulsar to measure the space-time warp caused by its two highly compact stars. The study provided new information on the effects of extreme gravity on neutron stars and binary systems.
Researchers from Spain and India found that pulsars with black holes are ideal for testing general relativity, but two cases reduce their value. The 'holy grail' pair is a normal black hole, which has yet to be discovered.
Scientists at Institute of Food Research developed a fast and cheap alternative to DNA testing for distinguishing horse meat from beef. The new method uses NMR spectroscopy to analyze the chemical composition of fat in meats, with results available in just ten minutes.
Astronomers have discovered a pulsar that emits an incredible amount of energy, shining brighter than previously thought possible. This find challenges the previous assumption that ultra-luminous X-ray sources are likely black holes.
Astronomers have discovered a pulsating, dead star beaming with the energy of about 10 million suns. Pulsars are dense stellar remnants leftover from supernovas, and this one is the brightest ever recorded.
Astronomers using NASA's NuSTAR telescope have discovered a pulsar in the Cigar Galaxy, emitting energy about 100 times brighter than predicted. This finding challenges long-held assumptions about ultraluminous X-ray sources and may lead to re-evaluation of other objects previously thought to be black holes.
Astronomers have observed a unique transformation of a binary system containing a rapidly spinning neutron star. The system, known as AY Sextantis, underwent a dramatic change in behavior, with the pulsar's radio beacon vanishing and its gamma-ray emission increasing fivefold.
Scientists detect a split-second burst of radio waves from the Arecibo telescope, marking the first time such an event has been recorded using an instrument other than the Parkes radio telescope. The finding suggests that these mysterious pulses are truly of cosmic origin and may be caused by exotic astrophysical objects.
Researchers used the interstellar medium as a lens to magnify and observe radio wave emission from a small rotating neutron star, achieving highest resolution ever measured. This technique allowed them to study pulsars, which emit pulsed radio waves, and potentially unlock new insights into their physics.
Researchers found a massive asteroid around PSR J0738-4042, which is being pounded by asteroids and could form planets. The asteroid's mass is about a billion tonnes, and its formation is linked to the star's intense radiation.
Astronomers have found a rare stellar system featuring a neutron star, two white dwarf stars, in an incredibly close orbit. By measuring the gravitational perturbations in this system, scientists can gain insights into the nature of gravity and potentially detect problems with General Relativity.
Researchers have discovered a steady change in the pulses of the Crab pulsar, indicating its strong magnetic field is moving towards the equator. The findings, made possible by a 42-ft telescope used to track ballistic missiles, provide insights into the star's interior and evolution.
A recent study using gravitational wave data from the Parkes radio telescope has challenged existing theories on supermassive black hole growth. The researchers tested four models of black-hole growth against observational data, effectively ruling out one model and pushing others to re-evaluate their predictions.
Researchers used gravitational wave data to test models of supermassive black hole growth, ruling out one model and leaving three others as possibilities. The study provides new insights into the growth of massive black holes, shedding light on a long-standing astronomical question.
Astronomers have discovered a millisecond pulsar with a unique dual identity, shifting between X-ray and radio emission in a phenomenon never before observed. The discovery represents a long-sought intermediate phase in the life of these powerful objects, offering a rare opportunity to study a pulsar's magnetic field in action.
A team of astronomers has identified a pulsar that switches between emitting X-rays and radio waves, offering the first direct evidence of one kind of pulsar transforming into another. This phenomenon was observed in a small cluster of stars 18,000 light-years away in the constellation Sagittarius.
Astronomers discovered a neutron star that can transform from a radio pulsar into an X-ray pulsar and back again, with its behavior fueled by a nearby companion star. The unusual behavior provides new insights into the birth of millisecond pulsars.
A team of scientists has developed a software that uses pulsar navigation to determine the position and velocity of spacecraft. By observing the timing of pulses from specific pulsars, the software can provide accurate location data for deep-space missions.
Astronomers have measured the magnetic field emanating from a swirling disk of material surrounding the black hole at the center of our Milky Way Galaxy. The measurement, made by observing a recently-discovered pulsar, is providing a powerful new tool for studying the mysterious region at the core of our home galaxy.
Researchers have discovered a magnetar at the centre of our Milky Way, providing insights into the strong magnetic field surrounding the supermassive black hole. The discovery enables scientists to study the accretion flow and X-ray emissions of the gravity trap.
A NASA team has built a first-of-a-kind testbed to simulate pulsar-on-table technology for X-ray navigation. The Goddard X-ray Navigation Laboratory Testbed will validate advanced technologies for the NICER/SEXTANT mission, which aims to study neutron star interior compositions and demonstrate pulsar-based navigation.
A team of scientists discovered a unique double object consisting of a massive neutron star and its white dwarf companion, pushing the limits of physical theories. The discovery offers an opportunity to test Einstein's general relativity with unprecedented precision.
Researchers have confirmed Einstein's theory of general relativity by observing a unique binary star system with a massive neutron star and a white dwarf. The study found that the system's gravitational waves match exactly what Einstein's theory predicts, providing strong evidence for the validity of the theory.
The Fermi Gamma-ray Space Telescope's complex motion is visualized as a Spirograph-like pattern from the pulsar Vela. The pattern captures the spacecraft's 95-minute orbit around Earth and its precession, a slow circuit every 54 days. This data also shows the LAT's nodding pattern to capture the entire sky.
Researchers found a pulsar, PSR B0943+10, that changes its behavior between two extreme states: one dominated by X-ray pulses and the other by highly organized radio pulses. The team used simultaneous observations with the XMM-Newton satellite and two radio telescopes to reveal this unique behavior.
Researchers observed a pulsar that dramatically changes its radio and X-ray emissions, defying existing theories on star emission. The study reveals the pulsar switches between two extreme states, one dominated by X-ray pulses and the other by organized radio pulses.
Pulsars suddenly increase speed in brief events called 'glitches,' but researchers question this phenomenon's explanation. A mathematical model shows that the available superfluid in a pulsar's crust is too small to cause such friction, contradicting current thinking.
A team of scientists at the Max Planck Institute for Gravitational Physics discovered a record-breaking millisecond pulsar, PSR J1311-3430, using a new data analysis method. The pulsar is accompanied by an unusual sub-stellar partner that it is vaporizing, earning it the nickname 'black widow'.
Southampton researchers have developed a model that explains how pulsars slow down with age. The spin rate of a pulsar slows down due to energy loss through radiation, but the exact mechanism was unclear until now.
Researchers identified a radio-quiet, very young pulsar J1838-0537 that experienced the strongest rotation glitch ever observed for a gamma-ray-only pulsar. The glitch resulted in a 38 millionths of a Hertz faster rotation rate.
Researchers using Chandra X-ray Observatory and XMM-Newton have found a point-like object, IGR J11014, which may be a rapidly spinning, super-dense star ejected during a supernova explosion. If confirmed, its speed of millions of miles per hour poses a challenge to existing models for supernova explosions.
Astronomers have observed a unique neutron star system, T5X2, exhibiting marginally stable nuclear fusion at high accretion rates. The RXTE data resolves a long-standing gap between theoretical predictions and observational evidence, shedding light on the complex processes governing thermonuclear explosions.
Researchers use pulsars to test General Relativity in extremely strong gravity and directly detect gravitational waves. Pulsar timing arrays may reveal evidence for cosmic strings and the early Universe.
Millisecond pulsars lose half of their rotational energy during mass-transfer process, explaining apparent age paradox and absence of sub-millisecond radio pulsars. This result is in agreement with current observations and helps resolve the 'turn-off' problem in stellar astrophysics.
A team of scientists using NASA's Fermi Gamma-ray Space Telescope has discovered a young millisecond pulsar named PSR J1823−3021A, challenging existing theories about its formation. The discovery pushes the total count of detected pulsars to over 100, with NGC 6624 globular cluster contributing significantly.
Scientists have found the first gamma-ray pulsar in a globular cluster, J1823-3021A, which is also the youngest millisecond pulsar discovered to date. Its high luminosity and strong magnetic field challenge current theories on its formation.
Researchers have discovered gamma rays with unprecedented energies from the Crab Pulsar in the Crab Nebula, contradicting existing theories. The findings suggest a different mechanism for producing these high-energy particles, which could be detected by the VERITAS observatory.
Scientists have detected pulsed gamma-ray emission from the Crab pulsar at energies far beyond what current theoretical models can explain. The VERITAS telescope array detected gamma-rays with energies exceeding 100 billion electron-volts, putting new constraints on the mechanism for how the gamma-ray emission is generated.
Researchers used the $20 million VERITAS telescope to discover pulsed gamma rays exceeding energies of 100 billion electron volts, a surprise given previous detection limits were at 25 billion eV. The findings indicate a need for new ideas about pulsars and their gamma-ray production.
The Crab pulsar generates beams of radiation from its spinning magnetic field, detected as rapid pulses of gamma-ray radiation. Researchers have detected these pulses with unprecedented energies, exceeding 100 billion electron-volts, putting new constraints on the mechanism for how this emission is generated.
Researchers detected high-energy gamma rays from the Crab Pulsar system, which cannot be explained by current models. The observations exceed 100 billion electron volts, shedding new light on pulsars and their behavior.
A team of astrophysicists has detected pulsed gamma rays from the Crab Nebula with energies up to 400 billion electronvolts, far exceeding previous detection limits. The high-energy emission challenges existing pulsar models and may require significant adjustments to our understanding of these extreme systems.
A NASA team will attempt to send a balloon with an instrument payload to measure gamma rays from the Crab Pulsar, 6,500 light years away. The mission aims to study the polarization of gamma rays, which can provide clues about the source's mechanism.
The Fermi catalog reveals a mix of known and unknown objects, with active galaxies, pulsars, and supernova remnants making up a large portion. Unassociated sources pose an intriguing mystery, sparking research into new types of gamma-ray-emitting objects.
Astronomers found a small, half-Jupiter-sized planet with a diameter of 60,000 kilometres orbiting an extremely dense pulsar, suggesting a unique formation process. The discovery reveals the possibility of a diamond-like structure in the planet's core due to its incredibly high density.
A team of astronomers using CSIRO's radio telescope discovered a small planet made of diamond orbiting an unusual star called PSR J1719-1438. The discovery provides insight into the evolution of binary systems and the formation of 'diamond planets', which are thought to be composed of crystalline material.
Astronomers have detected a planet orbiting a rapidly spinning pulsar, dubbed PSR J1719-1438. The discovery suggests that the planet is composed primarily of carbon and oxygen, likely forming a diamond-like material due to its high density.
A team of astronomers using NASA's Fermi Gamma-ray Space Telescope observed a unique binary system that produced dual gamma-ray flares during its closest approach. The flares were many times stronger than expected and occurred despite the star following an eccentric orbit, making them only visible every 3.4 years.
A collaboration between CSIRO and NASA has tracked down 25 ultrafast 'millisecond' pulsars in just two years, revealing insights into the physics of these small spinning stars. The research uses a combination of land- and space-based detectors to understand how pulsars make their beams of radiation.
Astronomers have discovered a neutron star with twice the mass of our Sun, ruling out certain theoretical models for its internal composition. The discovery has significant implications for astrophysics, nuclear physics, and our understanding of matter at extreme densities.
A new way to weigh planets has been developed using radio signals from small spinning stars called pulsars, providing an independent check on previous results. The measurements of planet masses made this new way could feed into data needed for future space missions.
A team of astrophysicists has observed dramatic flares and bursts of energy from a weakly magnetized, slowly rotating pulsar, challenging the understanding of how these events occur in normal, low-field neutron stars. The discovery indicates that internal magnetic fields may be responsible for powering these phenomena.
Astronomers detected X-ray eclipses from a fast pulsar, shedding light on compressed matter and testing relativity. The system's unique properties revealed the size and mass of the companion star with unprecedented accuracy.