Articles tagged with Thermal Runaway Supernovae
The release of a unique Type Ia Supernovae dataset has significant implications for cosmologists measuring the universe's expansion history. The dataset, comprising 3628 supernovae, provides unprecedented precision and accuracy in exploring the properties of these events.
Astronomers have detected radio waves emitted by a Type Ia supernova for the first time, revealing clues about white dwarf explosions. The supernova was found to be surrounded by helium-rich circumstellar material, indicating mass accretion from a companion star triggered the explosion.
Astronomers from Stockholm University detected the first radio emission of a Type Ia supernova, providing evidence for helium-rich circumstellar material. The discovery sheds light on the origins of these explosions and their role in measuring the expansion of the Universe.
Researchers used machine learning algorithms and k-D tree data structure to identify 11 previously undetected space anomalies, seven of which are supernova candidates. The team analyzed digital images of the Northern sky taken in 2018 using a k-D tree to detect anomalies through the 'nearest neighbour' method.
Astronomers have discovered a rare binary star system, HD265435, which is spiralling towards a Type Ia supernova. The white dwarf companion will go supernova in around 70 million years, providing valuable insights into the expansion of the universe.
Astronomers have discovered a rare teardrop-shaped star system that will eventually become a Type Ia supernova. The system, HD265435, is comprised of a hot subdwarf and a white dwarf star orbiting each other closely, with the white dwarf being as heavy as our Sun but slightly smaller than Earth's radius.
Roman will study thousands of type Ia supernovae across vast distances to pin down dark energy and understand the universe's expansion history. The mission aims to clarify discrepancies in measurements of the Hubble constant, which describes the current expansion rate.
A new estimate of the local expansion rate, using a relatively new technique for measuring cosmic distances, finds that the universe is expanding at 73.3 km/sec/Mpc, in the middle of three other good estimates. This discrepancy between estimates raises concerns about understanding the physics and evolution of the universe.
A 100 million light year away, an unusual Type Ia supernova has been observed by a Florida State University led research team. The supernova's slow brightening and unusual characteristics are unlike any other, providing valuable insights into the origins of these powerful explosions.
Swedish and Japanese researchers found a new explanation for the emission lines of SN 2006gy, a superluminous supernova. The discovery led to a revised understanding of how the supernova arose, with a double star system involving a white dwarf and massive hydrogen-rich star implicated.
Superluminous supernova SN 2006gy was found to be a Type Ia explosion that interacted with a dense shell of circumstellar material, producing an unusual spectrum with unidentified emission lines. The iron lines were identified as evidence of the interaction, which is consistent with observations and simulations.
Researchers developed a theory that sheds light on detonation formation at the heart of supernovae explosions, demonstrating the process using experiments and numerical simulations. The study predicts the conditions for detonation formation in Type Ia supernovae, providing insight into fundamental aspects of physical processes.
Astronomers have discovered a year-long plateau in the decline of Type Ia supernova light curves, challenging previous expectations. This unexpected behavior will impact the way astronomers measure the expansion of the universe and provide new insights into these powerful explosions.
A team of researchers identified 5 super luminous supernovae and about 400 Type Ia supernovae using the Subaru Telescope's Hyper Suprime-Cam. The discovery includes 58 Type Ia supernovae 8 billion light years away, revealing new insights into the expansion of the Universe.
Astronomers detect unusual chemical signature in ASASSN-18tb supernova, potentially resolving longstanding mystery surrounding their origins. The discovery offers new insights into the mechanism and players involved in creating Type Ia supernovae.
Researchers identified hydrogen-rich debris shed by a companion star, revealing it was likely a red giant or similar star that made its partner go supernova. This discovery sheds light on the types of companions that trigger Type Ia supernovae, which are used for cosmological studies.
Astronomers have found the first evidence of a 'super-remnant' formed from repeated star explosions in the Andromeda Galaxy. The remnant measures almost 400 light years across and is associated with the most frequent nova explosions known, occurring once a year.
New work from the Carnegie Supernova Project provides precise calibrations for using type Ia supernovae to measure cosmic distances. This improvement helps astronomers better understand how fast the universe is expanding and the potential impact of dark energy on this process.
The discovery of ASASSN-18bt, a Type Ia supernova, has revealed an unexpected pattern in the light from its first hours, complicating our understanding of how these phenomena originate. The findings suggest that the genesis of Type Ia supernovae is even more mysterious than previously thought.
The Hitomi mission has provided unprecedented insights into the chemical composition of hot gas in the Perseus galaxy cluster. Scientists have found that the proportions of iron-peak elements are nearly identical to those seen in our solar system, suggesting a similar chemical evolution process.
A team of researchers found evidence that a Type Ia supernova explosion was triggered by a violent helium detonation on the surface of a white dwarf star. The study used the Hyper Suprime-Cam camera on the Subaru Telescope to discover and analyze a recent supernova, providing the first solid evidence supporting this theory.
A team of researchers has discovered a type Ia supernova that can be explained by the ignition of helium on a white dwarf's surface, marking a significant breakthrough in understanding this phenomenon. The team used Hyper Suprime-Cam mounted on the Subaru Telescope to detect over 100 supernovae candidates in one night.
A new study finds a model universe with no dark energy provides a slightly better fit to Type Ia supernovae data than the standard dark energy model. The 'timescape cosmology' challenges current understanding of the Universe's expansion, highlighting the need for more data and better supernova precision.
A team of UChicago scientists have detected X-ray photons from a type Ia supernova for the first time, indicating dense circumstellar material. The finding challenges current understanding of these explosions and raises questions about their formation.
Astronomers have discovered a white dwarf with low mass, high velocity and strange composition that may be the remnants of a Type Iax supernova. The calculated age of the explosion suggests it occurred between five and 50 million years ago.
Astronomers have caught a cosmic event in great detail, observing a supernova and its explosive ejecta slamming into a nearby companion star. The discovery was made possible by a specialized survey taking advantage of recent advances in linking telescopes across the globe.
An international team of physicists and astronomers has detected for the first time multiple images from a gravitationally lensed Type Ia supernova. The observations suggest that this phenomenon can be used to test key cosmological theories about the accelerating expansion of the universe and the distribution of dark matter. By analyzi...
Astronomers have captured images of a Type Ia supernova appearing in four different locations on the sky due to gravitational lensing. This rare event has opened up new possibilities for measuring the rate of the Universe's expansion with unprecedented accuracy and understanding the distribution of matter.
Astronomers detected four images of the same supernova, a rare find, due to precise alignment with a foreground galaxy. This extreme case of gravitational lensing offers opportunities to study Type Ia supernovae and their role in cosmology.
A team of international astronomers has discovered a magnified Type Ia supernova, allowing for precise measurements of the universe's expansion rate and dark energy. The discovery uses gravitational lensing to amplify the light from a
A team of astronomers used the Hubble Space Telescope to analyze four images of a gravitationally lensed Type Ia supernova, measuring the expansion of the Universe without theoretical assumptions. The discovery provides clues about the Universe's expansion rate and has implications for cosmology.
Astronomers identify sun-like star associated with a Type Ia supernova, sparking investigation into its potential role in the white dwarf's demise. Further studies are needed to confirm if this star is indeed the culprit behind a white dwarf's fiery explosion.
A team of researchers led by David Cinabro found that Type Ia Supernovas can be used to measure the pace at which the universe expands. The study challenges recent headlines suggesting these explosions cannot be relied upon for this purpose.
Researchers at University of Chicago and Wayne State University reaffirm the reliability of Type Ia supernovae for measuring cosmic distances. The findings contradict recent claims that these supernovae are inconsistent in their brightness.
A team of scientists found that the evidence for an accelerating expansion of the universe may be flimsier than previously thought, with data consistent with a constant rate of expansion. The study challenges the standard cosmological concept and suggests that dark energy, a mysterious substance driving this acceleration, may not exist.
Astrophysicists propose that inspiraling white dwarfs could produce a type of explosion that matches Type Ia supernovae. The model suggests that resonance in the binary orbit of the stars causes rapid jumps in energy that can lead to detonation.
Astronomers using OISTER telescope consortium in Japan have discovered the origin of 'extraordinary supernovae', which are brighter than normal ones. The 'accretion' scenario supports the discovery, where material ejected from a white dwarf is responsible for the emission.
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.
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.
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 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.
Astronomers confirm three supernovae existed in the dark emptiness of intergalactic space, far from their home galaxies. This discovery provides crucial insight into the formation and evolution of galaxy clusters.
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.
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.
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.
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.
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.
Researchers have found two groups of type Ia supernovae with different properties, hinting at a reevaluation of the universe's expansion rate and dark energy. The discovery uses combined observations from the Hubble Space Telescope and Swift satellite.
Astronomers have determined the pre-explosion mass of a white dwarf star that blew up thousands of years ago using archival data from the Japan-led Suzaku X-ray satellite. The study suggests that only a single white dwarf was involved in the explosion, contradicting a well-established alternative scenario.
Researchers have discovered a galaxy that magnified a background supernova thirtyfold through gravitational lensing, confirming their previous explanation for the anomaly. This discovery may significantly impact our understanding of cosmic expansion and the mysterious components of the Universe, including dark energy and dark matter.
A new analysis of normal Type Ia supernovae reveals a range of masses, most near or below the Chandrasekhar limit. The SNfactory team used spectrography to 'weigh' the leftover debris, comparing masses and factors with light curves.
Scientists studying the closest, brightest supernova in decades discovered it exhibited unusual characteristics, including rapid brightening. The findings may provide new clues to how stars explode and improve distance measurements, constraining the nature of dark energy.
Astronomers plan observations of supernova SN 2014J with NASA/ESA Hubble Space Telescope and other space missions. The event provides an opportunity to study how interstellar dust affects its light.
Researchers analyzed X-ray telescope observations from the Suzaku satellite to study iron distribution in the Perseus cluster. They found that iron is spread evenly between galaxies, suggesting it was created at least 10-12 billion years ago through intense star formation and supernovae explosions.
Researchers have released a unique dataset based on 32 nights of repeated observations of SN 2011fe, providing unprecedented detail and a solid point of reference for Type Ia physics. The data reveals that the supernova is remarkably normal, passing important tests but not matching leading computational models.
Astronomers analyzed X-ray observations from the Suzaku satellite to understand the composition of Kepler's supernova, finding it held roughly three times the amount of metals as the sun. This discovery will aid in fine-tuning knowledge of the universe beyond our galaxy.
Astronomers have found the farthest Type Ia supernova, named SN Wilson, with a distance of over 13.8 billion years ago. This discovery provides insights into how these stars explode and test theories about dark energy.
A Type Ia supernova with a redshift of 1.71, dating back 10 billion years, has been detected using the Hubble Space Telescope's data by the Supernova Cosmology Project. This discovery provides valuable insights into the expansion history of the universe and the nature of dark energy.
A type of exploding star that fails to detonate, known as a failed explosion, is probably the cause of most peculiar supernovae. These dim stars are anywhere from 10-100 times fainter than normal ones and may account for approximately 15% of all type Ia supernovae.
Researchers use Multi-Object Double Spectrograph to determine composition of Type Ia supernovae, finding them likely caused by interaction between two white dwarfs. This discovery sheds light on the expansion and acceleration of the universe, opening new ideas in understanding.