STELLAR CHEMISTRY

News About Stellar Chemistry

4,992 articles

Fermi-type acceleration of interstellar ions driven by high-energy lepton plasma flows
Dec 04, 2015 (SPX)
Stochastic acceleration and shock acceleration are well recognized as key mechanisms for cosmic ray generation since first proposed by Fermi. So far, these two ...
Event Horizon Telescope reveals magnetic fields in central black hole
Dec 04, 2015 (SPX)
Most people think of black holes as giant vacuum cleaners sucking in everything that gets too close. But the supermassive black holes at the centers of galaxies...
Researchers question results from the study of pulsating stars
Dec 03, 2015 (SPX)
The movement of gas inside a star causes seismic waves which in turn cause irregularities on the star's surface. These 'earthquakes' (or pulsations) produce per...
New insights into the creation of heavy elements
Dec 03, 2015 (SPX)
Alpha particles, as the nuclei of the helium atom are also called, play a decisive role in the formation of heavier elements. Carbon, for instance, is formed fr...
'Fast radio burst' sheds new light on origin of these extreme events
Dec 03, 2015 (SPX)
Fast Radio Bursts (FRBs), brief yet brilliant eruptions of cosmic radio waves, have baffled astronomers since they were first reported nearly a decade ago. Thou...
Simulation shows key to building powerful magnetic fields
Dec 02, 2015 (SPX)
When certain massive stars use up all of their fuel and collapse onto their cores, explosions 10 to 100 times brighter than the average supernova occur. Exactly...
What Powers the Explosion of Stars
Dec 01, 2015 (SPX)
Enormous amounts of energy are released when a massive star, many times heavier than our Sun, collapses. Some stars explode in a hypernova - ten times more powe...
Collapsing super stars Hypernova or Gamma-Ray Bursts
Dec 01, 2015 (SPX)
A supercomputer simulation of a mere 10 milliseconds in the collapse of a massive star into a neutron star proves that these catastrophic events, often called h...
Aging star's weight loss secret revealed
Nov 27, 2015 (SPX)
VY Canis Majoris is a stellar goliath, a red hypergiant, one of the largest known stars in the Milky Way. It is 30-40 times the mass of the Sun and 300 000 time...
Simulating the Death of Stars
Nov 27, 2015 (SPX)
Humboldt Fellow Samuel Jones (University of Victoria, Canada) is exploring the evolution and the explosion of stars by means of highly sophisticated computer si...
The hottest white dwarf in the Galaxy
Nov 27, 2015 (SPX)
Astronomers at the Universities of Tubingen and Potsdam have identified the hottest white dwarf ever discovered in our Galaxy. With a temperature of 250,000 deg...
MUSE observations enable prediction of once-in-a-lifetime supernova replay
Nov 27, 2015 (SPX)
Astronomers have used the Multi Unit Spectroscopic Explorer (MUSE), attached to ESO's Very Large Telescope (VLT) at the Paranal Observatory, to take advantage o...
Planetary nebulae map of the Milkyway gets distancing tweak
Nov 25, 2015 (SPX)
A way of estimating more accurate distances to the thousands of so-called planetary nebulae dispersed across our Galaxy has been announced by a team of three as...
Earth Might Have Hairy Dark Matter
Nov 24, 2015 (JPL)
The solar system might be a lot hairier than we thought. A new study publishing this week in the Astrophysical Journal by Gary Prezeau of NASA's Jet Propulsion ...
VISTA pinpoints earliest giant galaxies
Nov 22, 2015 (SPX)
Just counting the number of galaxies in a patch of sky provides a way to test astronomers' theories of galaxy formation and evolution. However, such a simple ta...
Forged in the hearts of stars
Nov 19, 2015 (SPX)
Apart from hydrogen, as many have heard from the Carl Sagan and Neil deGrasse Tyson "Cosmos" series, every ingredient in the human body is made from elements fo...
3D visualisation redefines Milky Way's local architecture
Nov 18, 2015 (ESA)
Astronomers have used modern techniques to visualise data from ESA's Hipparcos space astrometry mission in three dimensions. The treatment of the data has offer...
Astronomers discover a distant galaxy with a pulse
Nov 18, 2015 (SPX)
Astronomers at Yale and Harvard have found a galaxy with a heartbeat - and they've taken its pulse. It is the first time scientists have measured the effect tha...
Gaia consortium meets ahead of first data catalogue release next year
Nov 18, 2015 (ESA)
From 16 to 20 November 2015, about two hundred members of the Gaia Data Processing and Analysis Consortium (DPAC) are meeting in Leiden, The Netherlands, to rev...
Discovery measures 'heartbeats' of distant galaxy's stars
Nov 17, 2015 (SPX)
In many ways stars are like living beings. They're born; they live; they die. And they even have a heartbeat. Using a novel technique, astronomers have detected...
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