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News About Stellar Chemistry
October 16, 2017
Surface helium detonation spells end for white dwarf
Tokyo, Japan (SPX) Oct 05, 2017
Some stars end their lives with a huge explosion called a supernova. The most famous supernovae are the result of a massive star exploding, but a white dwarf, the remnant of an intermediate mass star like our Sun, can also explode. This can occur if the white dwarf is part of a binary star system. The white dwarf accretes material from the companion star, then at some point, it might explode as a type Ia supernova. Because of the uniform and extremely high brightness (about 5 billion times b ... read more

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Scientists find missing baryons -- half the universe's missing matter
Two separate teams of researchers have found half of the universe's hidden matter, partially solving a mystery that has long troubled astronomers. ... more
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Mysterious Dimming of Tabby's Star May Be Caused by Dust
One of the most mysterious stellar objects may be revealing some of its secrets at last. Called KIC 8462852, also known as Boyajian's Star, or Tabby's Star, the object has experienced unusual dips i ... more
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ALMA and Rosetta detect freon-40 in space
Observations made with the Atacama Large Millimeter/submillimeter Array (ALMA) and ESA's Rosetta mission by an international team, including researchers from the Niels Bohr Institute, have revealed ... more
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Violent helium reaction on white dwarf surface triggers supernova explosion
An international team of researchers has found evidence a supernova explosion that was first triggered by a helium detonation, reports a new study in Nature this week. A Type Ia supernova is a ... more
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Astronomers use IAC instrument to probe the origins of cosmic rays
In November 1572 a supernova explosion was observed in the direction of the constellation of Cassiopeia, and its most famous observer was Tycho Brahe, one of the founders of modern observational ast ... more
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The Scientific Quest to Explain Kepler's Most Enigmatic Find
Some 1,500 light-years from Earth, a mystery of stellar proportions is playing out. A singular star out there captured scientists' and the public's imagination in September 2015 with its strangely f ... more
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NASA's Webb Telescope to witness galactic infancy
Scientists will use NASA's James Webb Space Telescope to study sections of the sky previously observed by NASA's Great Observatories, including the Hubble Space Telescope and the Spitzer Space Teles ... more
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Asymmetric sound absorption lets in the light
If you've ever lived in an apartment building or stayed in a hotel room, you are probably familiar with the inconvenience of inadequate sound absorption. Acoustic absorption refers to the absorption ... more

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Astronomers reveal evidence of dynamical dark energy
An international research team, including astronomers from the University of Portsmouth, has revealed evidence of dynamical dark energy. The discovery, recently published in the journal Nature Astro ... more
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Scientists still confounded by Milky Way's most mysterious star
Tabby's Star continues to confound astronomers. New analysis shows the Milky Way's 'most mysterious star' has experienced brief periods of brightening amid its prolonged dimming. ... more
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Progenitor for Tycho's Supernova Was Not Hot and Luminous
An international team of scientists from the Monash University (Melbourne, Australia), the Towson and Pittsburgh Universities (USA) and the Max Planck Institute for Astrophysics, has shed new light ... more
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HEIC 1716 is bursting with starbirth
This oddly-shaped galactic spectacle is bursting with brand new stars. The pink fireworks in this image taken with the NASA/ESA Hubble Space Telescope are regions of intense star formation, triggere ... more
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Engineers Warm NASA's Webb Telescope as End of Cryogenic Testing Nears
The temperature of Chamber A at NASA's Johnson Space Center in Houston has begun to rise, signaling the beginning of the end of James Webb Space Telescope's cryogenic testing. On Sept. 27, engineers ... more
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Astronomers detect Freon-40 around infant stars, comet
With the help of a powerful telescope and space probe, astronomers have detected traces of methyl chloride, or Freon-40, surrounding infant stars and the comet 67P/Churyumov-Gerasimenko. ... more
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NASA pushes back launch date for James Webb Space Telescope
NASA's new target window for the launch of the James Webb Space Telescope is between March and June 2019. The world's most powerful space telescope was previously scheduled to launch in October 2018. ... more
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New supernova analysis reframes dark energy debate
The accelerating expansion of the Universe may not be real, but could just be an apparent effect, according to new research published in the journal Monthly Notices of the Royal Astronomical Society ... more

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Researchers demonstrate quantum teleportation of patterns of light
Quantum communication over long distances is integral to information security and has been demonstrated in free space and fibre with two-dimensional states, recently over distances exceeding 1200 km ... more
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NASA using light to align the primary mirror segments of Webb Telescope
Engineers at NASA's Johnson Space Center in Houston used light waves to align the James Webb Space Telescope's mirror segments to each other, so they act like a single, monolithic mirror in the cryo ... more
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Molecular motors: Slowing the clockwork
Progress on the way to smart nanomachines: Chemists of Ludwig-Maximilians-Universitaet (LMU) in Munich have modified the synthesis of a molecular motor so as to reduce the speed of its light-driven ... more
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IceCube helps demystify strange radio bursts from deep space
For a decade, astronomers have puzzled over ephemeral but incredibly powerful radio bursts from space. The phenomena, known as fast radio bursts or FRBs, were first detected in 2007 by astrono ... more
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New type of supercomputer could be based on 'magic dust' combination of light and matter
A team of researchers from the UK and Russia have successfully demonstrated that a type of 'magic dust' which combines light and matter can be used to solve complex problems and could eventually sur ... more
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New Mirror-Coating Technology Promises Dramatic Improvements in Telescopes
Materials scientist Nobuhiko Kobayashi wasn't quite sure why the astronomer he met at a wine-tasting several years ago was so interested in his research, but as he learned more about telescope mirro ... more
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Detecting cosmic rays from a galaxy far, far away
In an article published in the journal Science, the Pierre Auger Collaboration has definitively answered the question of whether cosmic particles from outside the Milky Way Galaxy. The article ... more
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Oxygen-deficient dwarf galaxy hints at makings of early universe
A recently discovered dwarf galaxy in the constellation Lynx may serve well as a proxy for better understanding the developing chemistry of the early universe, according to a research team that incl ... more
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