Scientists have discovered a nearby supernova's ash continuing to fall on Earth, with rare iron-60 isotope detected in cosmic rays. The findings suggest another supernova occurred near the previous one, contributing to the ongoing acceleration of these nuclei.
Researchers at TUM and USA colleagues have discovered unusually high concentrations of radioactive 60Fe in lunar samples from Apollo missions 12, 15 and 16. This evidence supports a supernova hypothesis, suggesting that one or more explosive events occurred close to our solar system approximately two million years ago.
An international team found radioactive iron-60 in sediment and crust samples from the Pacific, Atlantic, and Indian Oceans, indicating a series of massive supernovae near our solar system. The debris is dated to 3.2-1.7 million years ago and coincides with Earth's cooling period.
Scientists are using computer models to simulate the production of heavy elements in supernovae and neutron-star mergers. The study aims to identify areas where future experiments can reduce uncertainties in nuclear models.
Scientists found that magnetars could boost the energy source of super-luminous supernovae, which are 10-100 times brighter than normal supernovae. Calculations suggest that rapidly spinning magnetars could power these extreme events.
Astronomers capture shock breakout of a supernova for the first time in visible light, revealing unexpected diversity in cataclysmic stellar events. The observations, made using NASA's Kepler space telescope, matched up well with mathematical models of Type II explosions.
Recent measurements from the LOFAR radio telescope have provided new insights into the properties of cosmic rays, including a surprisingly high number of light particles at high energies. The KIT simulation code CoREAS has enabled precise analysis and interpretation of these signals.
Astronomers have detected repeating fast radio bursts (FRBs) from an enigmatic source, suggesting an extremely powerful object that occasionally produces multiple bursts. The findings indicate the source is likely located beyond the Milky Way galaxy.
Researchers have observed that three years after its explosion, the brightness of a type Ia supernova continues to shine brighter than expected. This finding suggests that the powerful explosions produce an abundance of heavy cobalt, which provides an extra energy boost.
Researchers found a massive star pretending to be a supernova, emitting X-rays consistent with a neutron star core. The system's unique pairing suggests it may be one of the rarest types of binary systems, offering insights into star formation and evolution.
Researchers used new methods to model the common-envelope phase of binary stars, revealing dynamic instabilities crucial for supernova evolution. These turbulent fluctuations affect a star system's fate, influencing whether a supernova occurs and its type.
Scientists propose a new set of cosmic chemical reactions that could have contributed to the formation of life on Earth. Methanol is shown to be more reactive than methane and can give rise to varied hydrocarbons, their derivatives and products.
Astronomers studied the ionized gas outflow from NGC 6240, a starburst galaxy driven by intense star-forming activity. They found complex structures in the H-alpha nebula, including large 'broken bubbles' and evidence of past superwinds.
A team of astronomers has detected a gas cloud with a wide velocity dispersion, suggesting the presence of an intermediate mass black hole. The cloud's elliptical shape and composition indicate a compact but low-density component and a dense component extending 10 light years.
Researchers discovered the most luminous supernova yet observed in an unusual host galaxy, providing insights into super-luminous supernovae. The record-breaking ASASSN-15lh was found to mimic hydrogen-poor SLSNe's behavior but with greater extremes, sparking speculation about its extraordinary emission.
The newly discovered super-luminous supernova, ASAS-SN-15lh, is the most luminous ever recorded, outshining the entire Milky Way galaxy. Its unusual characteristics challenge current theories on magnetar-powered explosions.
Astronomers have witnessed a cosmic explosion about 200 times more powerful than a typical supernova, shedding light on the mysterious 'superluminous' explosions. The record-breaking blast, ASASSN-15lh, shone with 570 billion times the brightness of the Sun and is thought to be an outstanding example of a rare stellar scenario.
Researchers are investigating an explosion brighter than the Milky Way, with a tiny magnetar at its center. The object could be a millisecond magnetar spinning 1,000 times per second, shedding light on superluminous supernovae.
Researchers identified massive stars moving at supersonic speeds, creating bow shocks that help locate them. The team used infrared data to find over 200 images of fuzzy red arcs, which turned out to be stars in various stages of evolution.
The Fermi team has created the most detailed census of the sky yet made at extreme energies using improved data processing methods. The new sky map reveals hundreds of high-energy sources, including blazars and remnants of supernova explosions.
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.
A team of astronomers discovered the most detailed record ever of a Fast Radio Burst (FRB), indicating that it originated in a highly magnetized region of space. The research suggests a link to recent supernovae or active star-forming nebulae, significantly narrowing down the source's environment and type of event.
Researchers have discovered a detailed record of an FRB, providing new insights into its origin and environment. The signal exhibited Faraday rotation and passed through two distinct regions of ionized gas, shedding light on the mysterious astrophysical phenomenon.
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 identified a highly magnetized, gas-filled region of space as the source of a Fast Radio Burst (FRB), significantly narrowing down its environment and type of event. The discovery provides crucial constraints on understanding these mysterious events.
Researchers used supercomputer simulations to understand how magnetic fields amplify in collapsing stars, enabling jets that power supernovae and gamma-ray bursts. The study found a dynamo process creates large-scale fields needed for these explosions.
A team of international researchers employed powerful computer simulations to study the creation of jets in dying stars. Their work sheds light on an explosive chain reaction that helps form the structure of the universe. The simulations revealed a highly turbulent place, where magnetorotational instability drives the formation of jets.
A team from ASU and UNC aims to resolve uncertainties in the nuclear fusion process that creates elements forged by stars. They will investigate the range of elements produced by a star, including calcium and carbon, to determine their variation in output.
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.
A team of astronomers used data from the VLT to study the remains of an asteroid around a stellar remnant -- a white dwarf. They discovered an orbiting disc of gaseous material and found that it is lopsided and has not yet become circular.
Researchers identified ancient stars in the Milky Way's center with extremely low metal content, suggesting they formed in the early universe. These stars contain chemical fingerprints indicating possible hypernova deaths, which could aid understanding of the Universe's evolution over billions of years.
Swift has detected over 1,000 gamma-ray bursts, providing valuable insights into extreme physical processes. The most distant GRB recorded by Swift is from over 12 billion years ago, offering new opportunities to investigate how these events are distributed across space and time.
The Nearby Supernova Factory has developed a new method to measure cosmological distances using 'supernova twins,' which are pairs of supernovae with closely matched spectra. This approach reduces the scatter in brightness dispersion to just 8%, allowing for more accurate measurements and a stronger test of dark energy theory.
A new hydrodynamical simulation of the universe's visible structure, Magneticum Pathfinder, provides unparalleled insights into the cosmic landscape. The simulation covers a vast area of 12.5 billion light years, featuring unprecedented resolution and detail.
Researchers from Osaka University successfully created highly unusual plasma composed of hollow atoms using ultra-bright X-ray sources. This discovery sheds light on extreme state atoms and may lead to industrial applications such as non-destructive x-ray testing and new material construction.
The Hubble Space Telescope has unveiled a small section of the expanding remains of a massive star that exploded about 8,000 years ago. The Veil Nebula, covering six full moons on the sky, is composed of wisps of gas that were once a star 20 times more massive than our sun.
A Ph.D. student at the University of Houston is studying calcium-aluminum-rich inclusions from the Allende meteorite to understand when the solar system formed. By analyzing the age of these inclusions, he can gain insight into the timing and nature of early solar system processes.
The causes of stellar explosions known as Type Ia supernovae have been debated for decades. Recent studies suggest that either one or two white dwarfs can trigger these events, shedding light on the evolution of galaxies and dark energy. Understanding this phenomenon will inform our study of the universe's expansion.
A study by Carnegie's Alan Boss and Sandra Keiser suggests that a shock wave from a supernova may have induced the spin of our Solar System, enabling the formation of a disk around our proto-Sun. This finding challenges previous theories and provides new insights into the earliest phases of planet formation.
Scientists use archived data from NASA's Hubble Space Telescope to study 13 unusual exploding stars, known as supernovae. These young stars were ejected from their galaxies at high speeds, and astronomers believe that supermassive black holes in merging galaxies played a key role in their ejection.
A new study suggests that rogue supernovas that explode in deep space were likely kicked out of their galaxies at high speeds and then ejected into space by the gravitational pull of a binary black hole. The study, published in Monthly Notices of the Royal Astronomical Society, used data from NASA's Hubble Space Telescope to trace 13 h...
Researchers at Michigan State University have developed a new 3-D model of a giant star's last moments, which could help explain how these stars explode. The model addresses previous limitations, including the shape of the star and the lack of fuel source, paving the way for a deeper understanding of supernova mechanisms.
Researchers have discovered a unique binary star system, Gaia14aae, where one star eclipses the other. The system is an important laboratory for studying ultra-bright supernova explosions, which help measure the expansion of the Universe.
A study reveals that a massive star's collapse may power ultra-long gamma-ray bursts with the help of magnetars, rewriting our understanding of these cosmic events. Researchers observed a rare case where a supernova was linked to an ultra-long GRB, finding evidence of a magnetar at the source.
Astronomers have observed a super-bright supernova associated with an ultra-long-lasting gamma-ray burst, lasting over half an hour. The supernova was 15 times brighter than usual, suggesting a massive star release of extra energy in its death process.
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.
A collaborative project between Caltech and the Weizmann Institute of Science observed a unique radiation spike in ultraviolet range, supporting a giant companion model for white dwarf explosions. The findings highlight the importance of ultraviolet-range observations in understanding type Ia supernovae.
Researchers have developed a new method to estimate distances to X-ray sources using the geometry of light echoes and dust clouds. By analyzing the timing and deflection of X-rays as they pass through interstellar space, astronomers can calculate the distance to Circinus X-1, a binary system located in the plane of the galaxy.
Recent research found that supernovas work hand-in-hand with supermassive black holes to sweep out gas, interrupting star formation in galaxies. The partnership of these celestial events may help understand why massive galaxies stopped forming stars billions of years ago.
New research from the Palomar Transient Factory team provides evidence supporting the single degenerate channel theory for type Ia supernovae. The strong UV pulse detected in iPTF14atg indicates a collision between material ejected from the supernova and its companion star.
A team of Caltech astronomers detected a Type Ia supernova in nearby galaxy IC831, providing evidence for the single-degenerate model. The data suggest that the white dwarf's powerful gravity pulls material from the companion star, leading to a runaway nuclear reaction.
A team of astronomers witnessed a supernova smashing into a nearby star, creating an ultraviolet glow that reveals the size of the companion. The study provides new insights into the origin of type Ia supernovae.
The team discovered supernova iPTF 14atg using an automated software system that separates real astronomical transients from false detections. The system uses machine learning technology to identify events of astrophysical origin.
Astronomers captured the early stages of three type 1a supernovae using the Kepler space telescope, revealing initial shockwaves differed from expected patterns. The findings suggest an alternative hypothesis for supernova ignition, contradicting long-held theories about these explosive events.
Using supercomputer simulations, astronomers observed a flash of light caused by a supernova slamming into a nearby star, determining the stellar system from which it was born. This finding confirms one of two competing theories about the birth of Type Ia supernovae and suggests two distinct populations of these objects.
NuSTAR's observations confirm a highly asymmetric Supernova 1987A explosion, with X-ray emissions revealing explosive speeds of heavy elements. This study validates scientific assumptions about core collapse supernovae and challenges symmetrical explosion models.
Recent NuSTAR observations of supernova SN 1987A confirm the predicted lopsided nature of stellar giant deaths, with most material moving away from the observer. This finding supports supercomputer simulations that assume asymmetrical core collapse and could help solve the mystery of dual black hole and neutron star formation.
Theoretical work suggests water vapor could have existed in pockets of space a billion years after the Big Bang, with temperatures around 80 degrees Fahrenheit allowing for its formation. The team found equilibrium levels similar to those seen in our local universe.
The discovery fills a gap between ordinary supernovae and those that produce powerful gamma-ray bursts. Supernova 2012ap has characteristics expected of a gamma-ray burst, yet no such burst occurred.
Researchers have built detailed computer simulations of a GRB jet's internal structure, revealing that non-uniformity is key to determining astroparticle emission. The model predicts a lower neutrino flux from GRBs than previously thought, which may be detectable by the next generation of neutrino telescopes.