Articles tagged with Supernovae
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A team of Belgian and French astronomers have discovered three distant stars with extremely high Lead abundances, exceeding other elements heavier than Iron. This finding aligns with current stellar models predicting the buildup of heavy elements in stellar interiors.
Researchers will model and study supernovae to discover how they occur and the complex physical processes involved. They aim to understand challenging issues in theoretical and computational physics, advancing national security interests.
Researchers create method to determine subatomic particle mass based on speed of material streaming from a supernova, which could improve nuclear reaction understanding and dark matter detection. The technique hinges on the formation of black holes in about half of observed supernovas, allowing for precise timing of neutrino arrival.
Dr. Oliver Manuel proposes that the sun and planets formed from debris of a massive supernova explosion, contradicting conventional astrophysics theories. Recent data from NASA's Galileo probe supports his claims by detecting traces of strange xenon gases in Jupiter's atmosphere.
Researchers suggest that a rare radioactive isotope found in deep-sea sediments may be evidence of a nearby supernova. The explosion could have caused a 'cosmic-ray winter' leading to mini-extinctions about 5 million years ago, with effects still detectable today.
The Hobby-Eberly Telescope has successfully observed a distant quasar candidate, confirming its status and providing insight into the universe's early evolution. The instrument will also enable detailed study of objects in and near the Milky Way with the addition of two new facility-class spectrographs.
A new chemical sequence has been uncovered, casting doubt on long-held equilibrium theory and clearing the way for kinetic chemistry. The finding breaks the strong bond between carbon and oxygen atoms under intense radioactivity conditions.
Researchers found supernovas are fainter than expected, suggesting the universe has expanded more slowly in the past and is now accelerating. This discovery supports the Cosmological Constant theory, which had been dismissed by Albert Einstein, and has significant implications for our understanding of the universe's behavior.
Astronomers Renyue Cen suggests that gamma-ray bursts might come from supernovae expelling material at high speeds, producing jets that travel at nearly the speed of light. This theory could explain why some pulsars are moving faster than ordinary stars and potentially pose a catastrophic threat to Earth.
Researchers measured the velocity of gases ejected during an early phase of supernova formation, allowing them to tie its formation to the star's evolutionary phases. The study found that the entire nebula is at least 200,000 years old and probably several times older.
Astronomers predict that the debris cloud from Supernova 1987A will continue to expand and brighten over the next decade, reaching its final stage by 2007 A.D. The ring of hydrogen gas surrounding the supernova is expected to increase in brightness by a factor of 1,000.