Researchers find that dark stars could be the origin of the first supermassive black holes, producing a dominant contribution to the observed gravitational-wave background. The study uses pulsar timing arrays to probe the early Universe and constrain the abundance of ancient black hole seeds.
A new machine-learning method incorporating photon energies debunks the Galactic Center Excess, a faint gamma-ray glow around the Milky Way's center. The study finds that dark matter cannot be ruled out as an explanation for the signal.
Astronomers have discovered a new millisecond pulsar named PSR J1810−0623, featuring an exceptionally circular orbit. This discovery provides valuable information about binary evolution processes and the Galactic magnetic field structure.
The LHAASO discovery reveals an astonishingly efficient particle accelerator powered by PSR J1849-0001, exceeding theoretical limits and challenging current theories of particle acceleration. The system's gamma-ray luminosity is several times higher than that of the Crab Nebula.
The Tibet ASγ Experiment has measured magnetohydrodynamic turbulence on scales below one parsec within the gamma-ray halo surrounding the Geminga pulsar wind nebula. The study found that particle diffusion is strongly suppressed near Geminga and the turbulent properties follow a Kolmogorov-type scaling law.
The Crab Pulsar's unique zebra stripes are shaped by the combination of gravity's lensing effects and plasma's defocusing power. Light rays are spread apart by plasma and pulled inward by gravity, creating interference patterns that produce bright bands and darkness between them.
The discovery of PSR J2322-2650b, a Jupiter-mass exoplanet orbiting a rapidly spinning neutron star, challenges our understanding of planet formation. The exoplanet's atmosphere is dominated by molecular carbon and exhibits a unique helium-carbon composition.
A SETI Institute team monitored pulsar PSR J0332+5434 for 10 months to study its radio signal twinkling as it passes through gas between the star and Earth. The team observed slow, significant changes in the twinkling pattern over time, which can help distinguish human-made radio signals from signals from other star systems.
Researchers propose a method to distinguish between nanohertz gravitational wave sources using pulsar timing arrays. By searching for beat phenomena in the tiny shifts of pulsars' radio-pulse arrival times, scientists can identify specific, nearby binary supermassive black hole systems.
Scientists have unveiled a new detector concept that uses optical cavity and atomic clock technologies to detect gravitational waves in the milli-Hertz frequency band. This approach provides an immediate, cost-effective means to explore the mid-band range, which hosts signals from compact binaries of white dwarfs and black hole mergers.
LHAASO's groundbreaking results unveil a panoramic view of ultrahigh-energy gamma rays within the Milky Way, providing new insights into cosmic ray origins and extreme astrophysical processes. Four new discoveries include star-forming regions, pulsar wind nebulae, and young massive star clusters.
Dr. Karen I. Perez joins the SETI Institute as the inaugural recipient of the William J. Welch Postdoctoral Fellowship, developing real-time analysis pipelines for detecting signals from intelligent life. Her research will advance radio astronomy and contribute to shaping the next generation of SETI instrumentation.
Researchers led by Shuo Zhang used multi-wavelength studies to identify pulsar wind nebulae as potential cosmic ray sources. The findings could help unlock fundamental questions in physics, such as galaxy evolution and dark matter.
Astronomers have identified a rare type of binary star system featuring a rapidly spinning millisecond pulsar and a helium star companion. The system is thought to have formed through common envelope evolution, with the neutron star spiraling closer to its companion before ejecting energy and leaving behind a tightly bound binary.
A team of Australian scientists has performed a CT scan of the interstellar medium using a scintillating pulsar, mapping previously unseen layers of plasma. The study reveals an unexpected abundance of compact plasma blobs within the Local Bubble and measures the three-dimensional shape of a bow shock for the first time.
Scientists use FAST to analyze FRB 20201124A and discover 90% circular polarization, a record high. The findings contradict theoretical models, suggesting pulsar-like mechanisms may be more plausible.
Researchers have discovered that radio pulses lasting seconds to minutes are due to two stars coming together, rather than emissions from a single star. The study used a novel imaging technique to detect periodic radio signals in data taken with the Low Frequency Array (LOFAR), an international radio telescope.
A study by McGill University researchers has provided the clearest evidence yet that some fast radio bursts originate from neutron stars. The analysis of a single FRB signal showed striking similarities with pulsars, a well-studied class of radio-emitting neutron stars.
Researchers used pulsar accelerations and stellar velocities to determine the presence of a cluster of stellar mass black holes at the centre of Omega Centauri. The study refines understanding of the formation of these intermediate-mass black holes, which could bridge the gap between stellar and supermassive black holes.
A study published in The Astrophysical Journal reveals that pulsar signals change as they move through the interstellar medium, highlighting a need for updates to current ISM density models. The research found that models incorporating galactic structures tend to better fit the data, but predictions of newly discovered pulsars were worse.
The Crab Pulsar features a unique zebra pattern due to diffraction in the electromagnetic pulses caused by its dense plasma. Researchers have proposed various emission mechanisms, but none have convincingly explained the observed patterns until now.
Researchers found deviations in pulse arrival times that indicate unseen concentrations of mass, which could be dark matter objects. The study improves pulsar timing data sample, shedding new light on dark matter distribution in the Milky Way.
The European Research Council has awarded a €150,000 Proof of Concept grant to the DeepSpacePulse project, led by Prof. Nanda Rea, to develop an efficient and autonomous navigation system for deep space exploration. The new system aims to improve existing space navigation systems and be competitive in both public and private markets.
Researchers propose that simple forms of ultra-light scalar field matter could generate detectable gravitational wave backgrounds soon after the Big Bang. This discovery could shed light on dark matter and its role in the universe's mass, offering a new avenue for fundamental physics research.
Amaris McCarver and her team discovered a millisecond pulsar, GLIMPSE-C01A, in the stellar cluster Glimpse-CO1 using VLITE images and archival data. This finding holds potential for establishing a celestial GPS system for satellite navigation in space.
The team gathered data that helps clarify the Crab Nebula's history, suggesting a weak iron core-collapse supernova as an alternative to electron-capture explosions. The study also mapped dust distribution within the nebula for the first time, revealing warmer dust in outer filaments and cooler grains near the center.
Physicists have developed a new method to detect gravitational waves with extremely low frequencies, potentially revealing insights into the early universe. The technique analyzes pulsar data and has increased the
Astronomers have finally detected a compact source of ionizing radiation at the center of Supernova 1987A, likely a neutron star. The detection was made possible by the James Webb Telescope's high resolution and new instruments, resolving decades-old mystery about the supernova's final product.
Researchers use James Webb Space Telescope to observe Supernova 1987A and detect ionised argon and sulphur atoms, providing conclusive evidence for a neutron star's presence. The discovery sheds light on the formation of heavy elements and the nature of compact objects in supernovae.
Researchers detected a compact object with a mass between 2.09 and 2.71 solar masses, which is at the lower edge of the mass gap between neutron stars and black holes. The discovery has fascinating implications for understanding extremely dense nuclear matter and supernova explosions.
Researchers found an unknown object orbiting a rapidly spinning millisecond pulsar, weighing more than the heaviest neutron stars and less than the lightest black holes. The discovery was made using the MeerKAT Radio Telescope and could reveal new insights into black holes and neutron stars.
The U.S. Naval Research Laboratory has discovered nearly 300 gamma-ray pulsars, transforming the field of pulsar research with more than 15 years of data from Fermi. These cosmic clocks have been used in experiments to search for gravitational waves and study their origins.
Researchers using H.E.S.S. observatory in Namibia have detected the highest energy gamma rays ever from a dead star called a pulsar, with energies reaching up to 20 tera-electronvolts. This observation challenges our previous knowledge of pulsars and requires a rethinking of how these natural accelerators work.
Researchers detected distinct 'dwarf pulses' from PSR B2111+46 using the Five-hundred-meter Aperture Spherical radio Telescope. These narrow, weak pulses exhibit a rare reversed spectrum and are produced by one or a few particles generated by pair production in a fragile gap of the pulsar's magnetosphere.
Researchers report evidence of a cosmic background of gravitational waves likely produced by the merger of supermassive black hole binaries. The signal is detected through millisecond pulsar observations and has implications for our understanding of the universe's large-scale structure.
An international team of scientists reported on a radio pulsar phase from a Galactic magnetar, revealing unique emission mechanisms for 'bursts' and 'pulses'. The study provides clues to the formation theory of fast radio bursts.
A team of Chinese scientists has found key evidence for the existence of nanohertz gravitational waves, marking a new era in nanohertz gravitational wave research. The detection will help astronomers understand the formation of universe structures and investigate supermassive black holes.
Researchers from West Virginia University have made a groundbreaking discovery by detecting evidence of low-frequency gravitational waves, which can only be perceived with a detector much larger than the Earth. The signal was detected using pulsar timing arrays and has significant implications for understanding spacetime dynamics.
Researchers from the University of Florida have discovered evidence for gravitational waves at very low frequencies, consistent with Einstein's theory. The detection uses a network of radio telescopes to capture millisecond pulsars and create a galaxy-scale gravitational-wave detector.
Researchers using CSIRO's Parkes radio telescope have found strongest evidence yet for low-frequency gravitational waves, providing further insight into Einstein's general theory of relativity. The discovery, published in several journal papers, has also sparked collaboration among international teams searching for similar signals.
A multiyear NSF project led by OSU scientists has found evidence of low-frequency gravitational waves permeating the universe. The 'chorus' of gravitational waves was discovered using radio pulsar timing and reveals that they are a ubiquitous physical phenomenon.
Researchers have found key evidence for the existence of nanohertz gravitational waves through pulsar timing observations. The Chinese Academy of Sciences has detected quadrupole correlation signatures compatible with nanohertz wave predictions at a 4.6-sigma statistical confidence level.
The NANOGrav team has detected evidence of gravitational waves at very low frequencies, which they believe may be caused by the merger of supermassive black holes. The signal is thought to be a result of the gravitational wave background produced by these binary systems.
A team of researchers using radio telescope observations found evidence of gravitational waves passing through the Milky Way, causing spacetime distortions that appear as variations in pulsar ticking rates. The discovery provides insights into how galaxies evolve and supermassive black holes grow and merge.
Researchers have found evidence for gravitational waves oscillating with periods of years to decades, consistent with slowly undulating waves passing through the Galaxy. The signal was observed using a collection of cosmic clocks called pulsars, which are ultra-dense remnants of massive stars' cores.
Researchers have discovered a binary pulsar with a 53-minute orbital period, filling the gap in the evolution of spider pulsar systems. The finding confirms the existence of an intermediate state between redback and black widow spiders, a long-held theory.
Scientists have discovered a rare type of white dwarf pulsar, shedding light on stellar evolution and the origin of strong magnetic fields. The newly detected pulsar, J1912-4410, has a size similar to Earth but a mass at least as large as the Sun.
The HKU team's PULSAR boasts full onboard perception, mapping, and control capabilities in indoor and outdoor environments without external instruments. It can detect static and dynamic obstacles, track complex trajectories, and navigate autonomously even in complete darkness.
Scientists discover first gamma-ray eclipses from spider star systems using Fermi data, calculating system tilt and pulsar mass. The discovery helps researchers measure pulsar masses, constraining physics within extreme environments.
The FAST telescope has detected unprecedented detail about the distribution of neutral hydrogen gas in the Milky Way, revealing fine structures across 88 square degrees. The team also found evidence for magnetic field reversals along spiral arms and confirmed shell-type supernova remnants.
Researchers have discovered a new millisecond pulsar in the globular cluster NGC 6397, shedding light on the apparent overabundance of isolated pulsars. The newly found pulsar, PSR J1740-5340B, has a faint radio signal and extended quiescent periods, suggesting it may be representative of a subgroup of hard-to-detect binary pulsars.
The heaviest neutron star detected has consumed nearly all the mass of its companion, growing into a record-breaking object. The study provides constraints on matter's behavior at extreme densities, potentially excluding exotic states of matter.
Researchers have detected a persistent radio signal from a far-off galaxy that repeats every 0.2 seconds in a clear periodic pattern, similar to a heartbeat. The source of the signal is unknown but may be related to a radio pulsar or magnetar, which could provide an astrophysical clock for measuring the universe's expansion.
Scientists have found evidence for a young and extremely powerful neutron star, dubbed VT 1137-0337, in a dwarf galaxy 395 million light-years from Earth. The pulsar is thought to be as young as 14 years old and has the strongest magnetic field of any known object.
A team of researchers suggests millisecond pulsars could be responsible for the unexplained gamma-ray signal from the Milky Way center. The study proposes a new population of astrophysical sources in the Galaxy's center, which would help understand the star formation history of our Milky Way.
Researchers have identified the rarest type of black widow binary yet, featuring a pulsar and a third star that orbits every 10,000 years. The system, ZTF J1406+1222, has the shortest orbital period ever recorded, with the pulsar and companion star circling each other in just 62 minutes.
Researchers developed a new system using x-ray signals from pulsars to determine spacecraft location without prior information, allowing for autonomous navigation and reduced reliance on ground infrastructure. The algorithm combines observations from numerous pulsars to narrow down possible locations.
Astronomers have been searching for low-frequency gravitational waves by monitoring pulsar pulses, but now NASA's Fermi Gamma-ray Space Telescope can also be used to detect these waves. The satellite's high-energy light provides a clearer view of pulsars and offers an independent method to detect gravitational waves.
Researchers analyzed polarized properties of five repeating FRB sources using FAST and GBT, revealing systematic frequency evolution and rotation measure scattering. This unified description indicates complex environments around bursting sources, including supernova remnants or plasma near massive blackholes.
Scientists at Osaka University demonstrated the ability to generate gigagauss magnetic fields via gyro motion of relativistic electrons, with polarity reverse occurring instantly. The study, published in Scientific Reports, reveals a new mechanism for magnetic field growth and amplification.