Sentences with phrase «white dwarf star in»

Type Ia supernovae are fairly rare in the nearby Universe and represent the explosion of at least one white dwarf star in a binary system.

A white dwarf star in a binary orbit with a neighbour can slowly pull material off, gradually increasing its own...

A UCLA - led team of scientists discovered a white dwarf star in the constellation Boötes whose atmosphere is rich in carbon, nitrogen, oxygen and hydrogen.

Type Ia supernovae are caused by the complete destruction of a white dwarf star in a thermonuclear explosion.

Type Iax supernovae may be caused by the partial destruction of a white dwarf star in such an explosion.

Astronomers have identified a white dwarf star in our galaxy that may be the leftover remains of a recently discovered type of supernova.

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.

UC Santa Barbara Astrophysicists are the first to identify two white dwarf stars in an eclipsing binary system, allowing for the first direct radius measurement of a rare white dwarf.

Astrophysicists at UC Santa Barbara are the first scientists to identify two white dwarf stars in an eclipsing binary system, allowing for the first direct radius measurement of a rare white dwarf composed of pure helium.

Not exact matches

The extremely strong gravity of a massive neutron star in orbit with a companion white dwarf star puts competing theories of gravity to a test more stringent than any available before

Astronomy is beginning to detect and classify a life of the stars, red, blue and white, giant, middle - sized and dwarf; each type, in its dimensions, particular radiations and brilliance, being subject to a given evolutionary cycle.

Right: After a couple hundred million years, the red giant star has burned out and collapsed to the white dwarf that shines intensely in ultraviolet wavelengths.

The study, «Accretion - induced variability links young stellar objects, white dwarfs, and black holes», which is published in the journal Science Advances, shows how the «flickering» in the visible brightness of young stellar objects (YSOs)-- very young stars in the final stages of formation — is similar to the flickering seen from black holes or white dwarfs as they violently pull matter from their surroundings in a process known as accretion.

It was named in honor of Indian - American physicist Subrahmanyan Chandrasekhar who is known for determining the mass limit for white dwarf stars to become neutron stars.

OXYGEN on a planet might be a sign of life, but in two odd white dwarf stars it could indicate a narrow escape from violent death.

Locked in a deadly embrace, two white dwarf stars may be the strongest source of gravitational waves now flooding our galaxy.

• How might the burned - out stars called white dwarfs be brought to ruin by other stars in so - called Type Ia supernovae, inciting the fiery alchemy that yielded much of the iron in our blood and the potassium in our brains?

For the first time, scientists using NASA's Hubble Space Telescope have witnessed a massive object with the makeup of a comet being ripped apart and scattered in the atmosphere of a white dwarf, the burned - out remains of a compact star.

The white dwarf star is located about 570 light - years from Earth in the constellation Virgo.

In this artist's conception, a Ceres - like asteroid is slowly disintegrating as it orbits a white dwarf star.

The three bands then correspond to the galactic center of a galaxy in the Hubble field and the interacting galaxy, the center of a bright star in the Magellanic cloud and a star cluster and the last band corresponds to the white dwarf in the Helix and Cat's eye nebulae.

CANNIBAL ZOMBIE STAR Dead stars called white dwarfs (left) steal material from ordinary companion stars (right), as shown in this artist's illustration.

The diffuse cloud in this image, taken with the Carnegie Institution for Science's Swope telescope in Chile, is the shell of hot hydrogen gas ejected by a white dwarf star on March 11, 1437.

The X-ray perspective is dotted with torrid white dwarfs and neutron stars and bathed in multimillion - degree gas.

For the past two years, Winget and his colleagues at the University of Texas at Austin and Sandia National Laboratory in Albuquerque, New Mexico, have been creating searing plasmas that are, in effect, miniature versions of white dwarfs, ancient stars that have burned up all their nuclear fuel.

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.

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.

Led by Christopher Manser of the University of Warwick's Astrophysics Group, the researchers investigated the remnants of planetary systems around white dwarf stars; in this instance, SDSS1228 +1040.

That happens if it has a companion star, as most stars in the galaxy do, and the white dwarf orbits it closely enough to steal material from it.

But it turns out white dwarfs can breach that tipping point in another situation: Instead of a giant star losing material to a white dwarf, two white dwarfs orbiting each other could slam together and explode.

In 2014, scientists found another reason to rejoice in your genes» deterioration: White dwarf stars, like the remnant that will remain at the end of the sun's life, eat rocky planets like Earth for their last meaIn 2014, scientists found another reason to rejoice in your genes» deterioration: White dwarf stars, like the remnant that will remain at the end of the sun's life, eat rocky planets like Earth for their last meain your genes» deterioration: White dwarf stars, like the remnant that will remain at the end of the sun's life, eat rocky planets like Earth for their last meal.

«The cool thing, in this case, is that the lensing effect is so strong, we are able to use that to measure the mass of the closer, white dwarf star.

In their new study, the Leicester - led team assesses whether these laws are the same within the hot, dense conditions in the atmosphere of a dying white dwarf star as here on EartIn their new study, the Leicester - led team assesses whether these laws are the same within the hot, dense conditions in the atmosphere of a dying white dwarf star as here on Eartin the atmosphere of a dying white dwarf star as here on Earth.

The white dwarf, a cooling star thought to be in the final stage of life, is about Earth's size but 200,000 times more massive.

Such stars end their lives in huge supernova explosions, ejecting their stellar materials outwards into space and leaving behind an extremely dense and compact object; this could either be a white dwarf, a neutron star or a black hole.

When a white dwarf grows heavier than this, it can no longer support its own weight and starts collapsing, triggering nuclear reactions that rip the star to shreds in a type 1a supernova.

Two white dwarf stars orbiting each other will collide in 900,000 years, possibly annihilating both.

There are many white dwarfs that hold large amounts of hydrogen in their atmospheres, and this new study suggests that this is evidence that water - rich asteroids or comets are common around other stars than the Sun.»

These so - called supersoft sources are now thought to be white dwarf stars that cannibalize their stellar companions and then, in many cases, explode

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.

[3] Type Ia Supernovae occur when an accreting white dwarf in a binary star system slowly gains mass from its companion until it reaches a limit that triggers the nuclear fusion of carbon.

The discovery came as a complete surprise, as the team assumed the dusty white dwarf was a single star but co-author Dr Steven Parsons (University of Valparaíso and University of Sheffield), an expert in double star (or binary) systems noticed the tell - tale signs.

A whole new class of carbon - dominated white dwarf stars is a «major discovery,» says astronomer Pierre Bergeron of the University of Montreal in Canada.

«Any metals we see in the white dwarf will disappear within a few weeks, and sink down into the interior, unless the debris is continuously flowing onto the star.

Old stars are coming unglued on the way to becoming white dwarfs — and astronomers confidently predict that in 5 billion years the sun will be an old star.

In short order, astronomically speaking, the red giant blows off its outer layers and leaves behind a white dwarf — essentially the naked heart of the star — which slowly cools to eternal blackness.

The fastest pulsars are in binary systems with another object, like a star or a white dwarf.

In some alternate theories of gravity that could take over if general relativity turns out to be wrong, the neutron star could have gravitational effects going on inside it that the relatively willowy white dwarf would not.

In particular, the CDF - S source is likely associated with the complete destruction of a neutron star or white dwarf, and is roughly 100,000 times more luminous in X-rayIn particular, the CDF - S source is likely associated with the complete destruction of a neutron star or white dwarf, and is roughly 100,000 times more luminous in X-rayin X-rays.

According to a report published today in the journal Nature, some of the emissions come from discrete sources representing hundreds of never - before - seen white dwarf stars, neutron stars and black holes.