Sentences with phrase «of a white dwarf star»
Artist's impression of a rocky and water - rich asteroid being torn apart by the strong gravity of the white dwarf star.
sciencedaily.com
These observations are the first to confirm a theory about a certain type of white dwarf star.
Observations of the explosions of white dwarf stars in binary systems, so - called Type Ia supernovae, in the 1990s then led scientists to the conclusion that a third component, dark energy, made up 68 % of the cosmos, and is responsible for driving an acceleration in the expansion of the universe.
Imagine being able to view microscopic aspects of a classical nova, a massive stellar explosion on the surface of a white dwarf star (about as big as Earth), in a laboratory rather than from afar via a telescope.
Type Iax supernovae may be caused by the partial destruction of a white dwarf star in such an explosion.
Type Ia supernovae are caused by the complete destruction of a white dwarf star in a thermonuclear explosion.
How such a dense planet formed is unclear, the researchers say, but it's probably the crystalline vestige of a white dwarf star whose atmosphere was stripped away by the parent pulsar.
WHAT LIES WITHIN The inner structure of a white dwarf star (shown in this artist's impression) has been mapped for the first time — and it's more oxygen - rich than expected.
Postdoctoral researcher Matthew Bainbridge is the lead author of the early - stage study entitled Probing the Gravitational Dependence of the Fine - Structure Constant from Observations of White Dwarf Stars.
The researchers use the light of white dwarf stars observed with the Hubble Space Telescope.
A planetlike body 4,000 light - years away may be the compacted remains of a white dwarf star that is now mostly diamond.
A type Ia supernova represents the total destruction of a white dwarf star by one of two possible scenarios.
The first hint of the kamikaze asteroids came about 40 years ago, when astronomers discovered heavy elements such as magnesium in the spectra of some white dwarf stars.
Today, a UCLA - led team of scientists reports that it has discovered the existence of a white dwarf star whose atmosphere is rich in carbon and nitrogen, as well as in oxygen and hydrogen, the components of water.
Artist impression of a rocky and water - rich asteroid being torn apart by the strong gravity of the white dwarf star GD 61.
About 1 - 3 percent of white dwarf stars seem to contain dust and rocky debris, which may represent remnants of rocky planets such as Earth.
Chandra X-Ray Observatory, NASA, UMass — larger and jumbo x-ray images This 400 by 900 light - years (ly) mosaic image of the Milky Way galactic center includes «hundreds of white dwarf stars, neutron stars, and black holes bathed in an incandescent fog of multimillion - degree gas» — plus a central black hole in the bright patch at center (more at Chandra X-Ray Observatory and Wang et al, 2001).
Modern astronomers know that the event Tycho and others observed was a Type Ia supernova, caused by the explosion of a white dwarf star.
Today, astronomers cite GK Persei as an example of a «classical nova,» an outburst produced by a thermonuclear explosion on the surface of a white dwarf star, the dense remnant of a Sun - like star.
Specifically, the inferred presence of calcium - carbonate came from examining the atomic leftovers of the planet accretion event in the atmosphere of the white dwarf star — after the presumed dust from the planet's demolished surface was consumed by the white dwarf.
Known as 2014J, this was a Type la supernova caused by the explosion of a white dwarf star, the inner core of star once it has run out of nuclear fuel and ejected its outer layers.
Neither study searched for the stars responsible for so - called type Ia supernovae, which are explosions of white dwarf stars that have grown overweight by feasting on material from a companion star.
This kind of supernova is known to be the explosion of a white dwarf star, though it requires additional mass from a companion star to explode.
The explosion — which took place in the galaxy Messier 85 — was too faint to be a supernova, in which a star literally explodes, but it was too bright to be a regular, old nova or [a] thermonuclear explosion from the surface of a white dwarf star.