Articles tagged with Binary Stars
Researchers have observed the strongest evidence yet for a companion star to Betelgeuse, which is about two to three times more massive than the Sun. The team used the European Southern Observatory's Very Large Telescope to obtain the clearest image of Betelgeuse B.
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.
New simulations show that a magnetic field can decrease the distance between forming binary protostars, explaining observed characteristics of Milky Way binary star systems. This process also gives insights into massive black hole evolution and merger formation.
A team of astronomers has identified a rare stellar system that provides a unique natural laboratory to study extreme physics. The system, called ASKAP J1745−5051, consists of a white dwarf and a red dwarf star, producing powerful bursts of radio waves and X-rays.
The absence of exoplanets orbiting tight binary stars is attributed to the effects of general relativity, which causes gravitational tugs from the stars to make a planet's orbit precess. This process makes it difficult for close-in planets to survive, with 75% being destroyed due to tidal disruptions or ejection from the system.
Researchers have imaged a beautiful shock wave around a dead star, RXJ0528+2838, which challenges our current understanding of how dead stars interact with their surroundings. The team found that the white dwarf has been expelling a powerful outflow for at least 1000 years, driven by its strong magnetic field.
Researchers at Kyoto University observe a peculiar supernova explosion, SN 2022esa, which reveals the birth of a black hole binary. The study provides new direction for understanding massive star evolution and black hole formation.
Astronomers at Northwestern University have directly imaged a Tatooine-like exoplanet orbiting two suns, revealing unique insights into how planets form around multiple stars. The discovery provides an unprecedented look at the complex dynamics of binary systems and offers new opportunities to test theories of planet formation.
Recent studies reveal a class of short period binary systems where white dwarfs are inflated and their surface temperatures can reach 10-30 thousand degrees Kelvin. Tidal forces can strongly influence the evolution of these stars, causing them to inflate and increase in temperature.
Astronomers discovered a greedy white dwarf star consuming its closest celestial companion at an unprecedented rate. The study found that the super-dense white dwarf is burning brightly due to the mass transfer between the two stars, potentially leading to a massive explosion visible from Earth.
Astronomers have identified an extremely rare hierarchical quadruple star system consisting of a pair of cold brown dwarfs orbiting two young red dwarf stars. The discovery provides a unique cosmic laboratory for studying these mysterious objects, which are too big to be considered planets but also lack the mass to be full-fledged stars.
The Gemini North telescope has detected the long-predicted companion star of Betelgeuse for the first time. The companion star is six magnitudes fainter than Betelgeuse and has an estimated mass of around 1.5 times that of the Sun, confirming the presence of a stellar companion orbiting the red supergiant.
Kilonova Seekers, a public participation project, has announced its first major discovery - a bright exploding star named GOTO0650. The team collected highly complete dataset on the star through fast response from volunteers, suggesting it's a period bouncer and rare object to find in wide-field imaging surveys.
Astrophysicist Kyu-Hyun Chae develops a new method to measure gravity with 3D velocities of wide binary stars, confirming modified gravity at low acceleration. The results show that standard gravity is outside the 99.997% probability range for internal accelerations below 1 nm/s^2.
A team of researchers has found a planet orbiting at a 90-degree angle around a pair of young brown dwarfs, marking the first time such strong evidence for a 'polar planet' orbit is collected. The discovery was made possible by pioneering data analysis that improved precision by a factor of 30.
Astronomers have found the first strong evidence for a 'polar planet' orbiting a stellar pair, with the unprecedented exoplanet named 2M1510 (AB) b. The planet orbits at an angle of 90 degrees around two young brown dwarfs.
Researchers have discovered key conditions needed for a stellar black hole to create plasma jets, including the rapid shrinkage of superheated gas material towards the black hole. This study reveals that jets form under dynamic conditions, providing insights into galaxy evolution and the properties of black holes.
Researchers found a high-velocity star ejected from a globular cluster at an extreme velocity of nearly 550 km/s, suggesting the presence of an intermediate-mass black hole. The star's similarities with the cluster's chemical composition and age provide strong evidence for the IMBH's existence.
Warwick astronomers have discovered the first double white dwarf binary system, which will explode as a type 1a supernova in 23 billion years. The system is located 150 light-years away and consists of two compact white dwarfs with a combined mass of 1.56 times that of the Sun.
Astronomers have discovered entwined dwarf stars emitting radio pulses, challenging the long-held assumption that only neutron stars were responsible for these emissions. The discovery was made using follow-up observations of two stars orbiting each other every two hours.
An international team has traced radio pulses to a binary system with a dead star, where a red dwarf and white dwarf orbit each other, emitting a radio blast every two hours. This discovery shows that the movement of stars within a binary system can also emit long-period radio bursts.
Researchers uncover novel formation process for free-floating planetary-mass objects, which are cosmic nomads drifting freely through space. These objects can form directly through violent interactions between circumstellar disks in young star clusters.
Scientists discovered a rare binary system consisting of a massive Be star and a compact white dwarf, with the Einstein Probe catching the X-ray signal from its initial flare-up to its fading away. The analysis revealed clues about the elements present in the exploding material, including nitrogen, oxygen, and neon.
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 identified a group of unusual objects emitting long-duration outbursts of X-rays, which may be caused by binary star systems with white dwarfs and subgiant stars. The discovery of millinovae could provide insights into the astrophysics of Type Ia supernovae.
An international team of researchers has found the first binary star in the immediate vicinity of Sgr A* by analyzing individual observations of dust sources. The discovery provides new clues to how young stars form close to the supermassive black hole, solving a long-standing mystery.
Astronomers have discovered the first binary star orbiting close to Sagittarius A*, a supermassive black hole at the centre of our galaxy. This finding provides new insights into how stars survive in extreme environments and could pave the way for detecting planets near black holes.
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 recent study reveals that fast radio bursts are more commonly associated with massive and metal-rich star-forming galaxies. This suggests that magnetars, the thought-to-be-triggers of FRBs, likely form in environments conducive to stellar mergers. The discovery was made using Caltech's Deep Synoptic Array-110 project.
Researchers from DTU have discovered a neutron star that rotates at an astonishing 716 times per second, making it one of the fastest-spinning objects ever observed. The neutron star is part of an X-ray binary star system and is located in the Sagittarius constellation.
Astronomers have observed a black hole triple system for the first time, featuring a central black hole consuming a star and a distant companion that orbits every 70,000 years. The discovery raises questions about the origins of the black hole itself.
Astronomers at Caltech have discovered that the well-studied brown dwarf Gliese 229B is actually a pair of tightly orbiting brown dwarfs weighing about 38 and 34 times the mass of Jupiter. This resolves the long-standing mystery about its dimness.
Researchers, including WVU astronomer Emmanuel Fonseca, use radio pulsars to detect gravitational waves generated by massive objects. The study will merge data from the Green Bank Telescope and CHIME radio telescope to achieve full coverage of each wave, revealing information about phenomenon and objects in distant galaxies.
Researchers unveil previously unseen properties of neutron stars through gravitational wave analysis, providing insight into internal composition and dynamic material properties. The study places observational constraints on viscosity within neutron stars.
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 uncovered 21 neutron stars in wide orbits around stars like our Sun, revealing the first dark neutron star population. The discovery was made possible by the European Space Agency's Gaia mission, which scanned the sky and measured wobbles of over a billion stars.
Scientists have captured the first-ever image of an S-shaped jet coming from a confirmed neutron star, providing strong evidence for precessing jets. The discovery was made using the MeerKAT telescope and reveals valuable insights into the extreme physics behind the launching of the jet.
For the first time, a team of French scientists has observed brown dwarfs orbiting very close to bright stars using precise astronomical imaging. The findings provide new insights into the formation of these unusual celestial objects and massive exoplanets.
New simulations show that neutrinos created during neutron star collisions can be trapped at the interface of merging stars and interact with matter for 2-3 milliseconds. This brief out-of-equilibrium phase is crucial in understanding the physics of these extreme events.
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.
Astronomers have used Hubble and SOFIA to study the HM Sge binary star system, which experienced a sudden increase in brightness 40 years ago. The team has found that the system's temperature has increased, but paradoxically faded slightly, raising questions about its long-term behavior.
Astronomers uncover evidence of a massive star's quiet demise into a black hole without a supernova explosion. The VFTS 243 system shows minimal signs of an explosion, offering insight into stellar evolution and collapse theories.
A team of astronomers and citizen scientists has discovered a planet in the habitable zone of an unusual star system, including two stars and potentially another exoplanet. The newly discovered planet, TOI 4633 c, boasts the second-longest orbit of any planet discovered with TESS data.
Astronomers confirm that chemical composition differences in binary stars can be traced back to the earliest stages of their formation. The study used precise spectrographic measurements to rule out two explanations and confirmed primordial inhomogeneities within the molecular cloud as the origin of the discrepancies.
Researchers have discovered a star orbiting a massive black hole 33 times heavier than the sun's mass, located 1500 light-years away from Earth. The binary system Gaia BH3 contains an ordinary star that seems to have formed over ten billion years ago.
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.
Researchers discovered that twin stars differ in composition due to one star devouring planets or planetary material. The study used high-precision analysis and found the phenomenon in about eight percent of 91 pairs of twin stars, shedding light on planet evolution theorists.
Researchers found nine out of 40 studied systems have perfect alignment, suggesting planetary systems may prefer an orderly configuration. This could be beneficial for life forming in those systems, as misaligned stellar companions can disrupt planetary stability.
The H.E.S.S. Observatory detected gamma-ray emission from the outer jets of SS 433, revealing a shift in energy-dependent morphology. This suggests strong shock acceleration, where high-energy particles collide with photons, producing x-ray radiation and explaining the X-ray reappearance of the jets.
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.
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.
Researchers have uncovered a population of 25 intermediate-mass helium stars that bridge the gap in knowledge about hydrogen-poor supernovae. These stars were found using UV photometry and optical spectroscopy, with strong spectral signatures of ionized helium confirming their composition.
Researchers have identified a population of massive stars stripped of their hydrogen envelopes by their companions in binary systems. These hot helium stars are believed to be the origins of hydrogen-poor core-collapse supernovae and neutron star mergers, shedding new light on a long-theorized phenomenon.
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.
Researchers discovered magnetic field transport in accretion flow and MAD formation near a black hole, resolving long-standing mysteries. The study reveals the first direct observational evidence for a magnetically arrested disk (MAD) through multi-wavelength observations.
A new study by Kyu-Hyun Chae found conclusive evidence for the breakdown of standard gravity in low acceleration limit using up to 26,500 wide binaries observed by Gaia. The results show a boost factor of 30-40% higher than Newton-Einstein prediction, meeting conventional criteria of 5 sigma significance.
Researchers predict that two black holes producing chirp signals preferentially occur in two universal frequency ranges, providing insights into black hole formation and stellar explosion mechanisms.
An international team of scientists has detected a quasi-periodic oscillation (QPO) signal in the radio band from a Galactic black hole system, revealing features that have never been seen before. The QPO signal may provide the first evidence of activity from a jet launched by a Galactic stellar-mass black hole.
Researchers have found a source for the mysterious alignment of planetary nebulae near the Galactic Centre, attributing it to close binary stars. The study confirms the alignment but also reveals that specific groups of planets are responsible.