Articles tagged with Compact Stars
Researchers found that neutrino flavor transformations alter the composition and signals of what's left after a neutron star collision, impacting the creation of heavy metals and rare earth elements. The simulations also influenced the matter ejected from the merger and electromagnetic emissions detectable from Earth.
Astronomers detected water ice and nitrogen in fragments torn apart from a Kuiper Belt analog, revealing the presence of volatile-rich material. The discovery sheds light on planet formation and the delivery of water to rocky planets.
Scientists have discovered a planet with a comet-like tail, shedding surface minerals and evaporating away due to its close proximity to its star. The planet is estimated to disintegrate in about 1 million to 2 million years, leaving behind a long and dusty tail.
Advanced simulations reveal that PMOs form directly from disk interactions, inheriting material and moving synchronously with host stars. This discovery reshapes our understanding of cosmic diversity, suggesting a new class of objects born from gravitational chaos.
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.
Researchers found an intermediate-mass black hole in star cluster IRS 13 near SgrA*, suggesting it could be a 'seed' for the central supermassive black hole. The discovery provides insights into the galaxy's evolution and the formation of intermediate-mass black holes.
Astronomers have observed the faint light from stars in the host galaxies of three ancient quasars, revealing clues to how the earliest supermassive black holes and galaxies evolved. The study suggests that some of the earliest
Astronomers have identified a massive stellar black hole with a mass of 33 solar masses, making it the most massive found in the Milky Way. The black hole is located at 2000 light-years away and was discovered using data from the European Space Agency's Gaia mission.
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.
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.
Astronomers used James Webb Space Telescope to discover that Milky Way-like galaxies are surprisingly common and dominated throughout the universe's history. These 'disk' galaxies formed 10 billion years ago or longer and were previously thought to be fragile in early Universe.
A new study has captured the early stages of planetary evolution, observing a young gas planet's violent and erratic atmospheric shedding. The research, led by Dartmouth researchers, provides insights into the most common experiences of planets beyond our solar system.
An international team of astronomers has discovered a new type of stellar object that challenges our understanding of the physics of neutron stars. The newly discovered object, named GPM J1839−10, emits radio waves every 22 minutes, making it the longest period magnetar ever detected.
Researchers have discovered the coldest star yet to produce emission at radio wavelengths, with a surface temperature of 425 degrees centigrade. The ultracool brown dwarf is a rare find, as most do not emit radio waves due to their dynamics.
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.
Researchers observed a sudden slowing of the star's angular momentum, followed by three Fast Radio Burst-like radio bursts and a month-long episode of pulsed radio emission. The synchronicity of these events suggests an association between magnetar spin-down glitches and radio emissions.
Researchers at the University of Washington have discovered a unique binary star system where a small companion star is surrounded by a large disk of dusty material. The companion star caused a seven-year-long eclipse of the main star, Gaia17bpp, which is one of the longest recorded eclipses.
A team of astronomers used the James Webb Telescope to identify five ancient globular clusters, potentially containing the first and oldest stars in the universe. The clusters were formed close to the Big Bang, offering insights into star formation and galaxy evolution.
Astronomers have discovered a unique triple star system consisting of two binary stars and one massive tertiary star. The system is incredibly luminous due to its compact nature and was initially detected by amateur astronomers using NASA's TESS observatory data.
Researchers at University of Cologne and Masaryk University discovered a star, S4716, orbiting Sagittarius A* in just four years and reaching speeds of 8000 kilometers per second. The study sheds new light on the origin and evolution of fast-moving stars near black holes.
The Event Horizon Telescope Collaboration has captured the first direct visual evidence of a supermassive black hole at the centre of our galaxy. The image reveals a dark central region surrounded by a bright ring-like structure, indicating the presence of a massive object four million times more massive than our Sun.
Researchers used Chandra X-Ray Observatory to detect X-ray signatures of black holes in nuclear star clusters across 108 galaxies. The study found that above a certain mass and density threshold, these clusters emit x-ray signatures indicative of a black hole at twice the rate below the threshold.
A team of astronomers discovered neutron stars blowing hot, warm and cold winds while consuming matter from a nearby star. The discovery provides key information about the behaviors of these extreme cosmic objects, which contribute to the formation of new stars and galaxy evolution.
A team of astronomers has discovered a mysterious object releasing giant bursts of energy three times an hour, which could be a neutron star or white dwarf with an ultra-powerful magnetic field. The object is incredibly bright and smaller than the Sun, emitting highly-polarised radio waves.
Research reveals that galaxies with larger, 'puffy' disks continue to form stars over a longer period after cosmic noon. This is due to the cooler gas and lower influence of black holes, allowing for continued star formation. By studying galaxy disk size, astronomers can now accurately predict when star formation will cease.
The team observed the nebula with two different spectrographs on large telescopes, finding that the central star is inflated and signatures of accretion are present. The data suggest a merging binary star system, offering a clear view of the central stellar remnant.
Researchers suggest that axionic dark matter surrounding compact stars can prevent catastrophic magnetic field losses while allowing for abnormal rotation. This theory provides an alternative to previous understanding of rapidly rotating objects with strong magnetic fields.
Researchers at Western University found evidence for direct formation of massive black holes without stellar remnants. The new model explains observed distribution of supermassive black hole masses and luminosities, providing an explanation for their presence at an early stage in the universe.
Astronomers estimate that Messier 11 formed 220 million years ago and will disperse in a few million years as its stars are ejected by stronger gravitational forces.
The latest data from the STAR experiment at RHIC show that different flavors of antiquarks contribute differently to proton spin, with up antiquark spins making a greater contribution than down antiquark spins. This result provides new insights into the proton spin puzzle and reveals a more complex picture than previously thought.
Scientists observed a young, massive star changing shape over 18 years, revealing key stages of its formation. A torus-shaped dusty environment slowed down an initially spherical outflow, resulting in an elongated, beam-like structure.
Astronomers have captured the clearest view of a galaxy pipeline, where material flows between two compact galaxies after a collision. The pipeline, stretching 20,000 light-years, is believed to contribute to a lack of star birth in NGC 1409, as gas flows in is too hot to form stars.
Astronomers have discovered over 154 rapidly moving stars towards the center of the Milky Way and its brightest neighboring galaxy. The findings are significant as these stars were previously difficult to detect due to their extreme density, allowing scientists to gain insights into the galaxy's most densely packed regions.
A team of astronomers has discovered a unique cluster of young stars, approximately 8 million years old, located 97 parsecs from Earth. The cluster, centered around eta Chamaeleon, is one of the nearest to our planet and exhibits unusual characteristics.
Astronomers used numerical cosmology to study the earliest structures that formed in the universe, finding tiny star clusters containing 1,000-10,000 solar masses. These early clusters were likely the 'spark plugs' that started the formation of galaxies.
Astronomers used an instrument to collect light from 1000 objects, discovering seven compact blue galaxies beyond 2 billion light years away
A team of astronomers led by Eric Neilsen discovered that a large galaxy is stripping star clusters from neighboring galaxies. The study used data from the Hubble Space Telescope to confirm that globular clusters were stripped away by M87, a giant elliptical galaxy.
Case Western Reserve University physicist Glenn Starkman has received a four-year, $200,000 NSF grant to study the shape of the universe by mapping temperature fluctuations throughout space. He aims to develop new techniques to detect dark matter, which is believed to comprise much of the mass in the universe.