Sentences with phrase «of white dwarf stars»

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.

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.

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.

The researchers use the light of white dwarf stars observed with the Hubble Space Telescope.

The atmospheres of some white dwarf stars contain heavy elements, which are thought to result from eating asteroids.

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.

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.

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.

Artist's impression of a rocky and water - rich asteroid being torn apart by the strong gravity of the white dwarf star.

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.

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.

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.

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.

«The gas which forms the major part of the insterstellar medium,» explains Jorge García Rojas, a researcher at the IAC who is the first author on the paper «can be observed because its atoms are ionized by the photons emitted by the hot stars embedded inside it (which can either very massive stars, or white dwarfs, which are also very hot).

Once this fuel is used up, however, the remaining matter is crushed into the center of the star, which becomes a white dwarf.

The researchers found that relatively cool accretion discs around young stars, whose inner edges can be several times the size of the Sun, show the same behaviour as the hot, violent accretion discs around planet - sized white dwarfs, city - sized black holes and supermassive black holes as large as the entire Solar system, supporting the universality of accretion physics.

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.

The small red circles denote other objects that emit X-rays, like neutron stars or white dwarfs, that are found scattered around more of the galaxy.

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?

As relatively small stars (those less than ten times the mass of our sun) near the end of their lives, they throw off their outer layers and become white dwarf stars, which are very dense.

«White dwarf star exhibits an unusual atmosphere of oxygen.»

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.

Within the next million years or so, all that will remain of these asteroidal bits is a thin metal dusting on top of an innocent - looking white dwarf star.

Researchers have discovered a white dwarf star with an atmosphere dominated by oxygen, a type of white dwarf that has been theorized to exist but not identified to date.

Astronomers think white dwarfs must not be stars so much as the corpses of stars.

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.

The unseen movers are fast - moving white dwarf stars that could account for as much as one - third of the galaxy's dark matter.

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.

We once thought that dark matter might be made up of large objects such as black holes or exotic types of faint stars — neutron stars or white dwarfs — that are nearly invisible to our telescopes.

A 21 - year study of a pair of ancient stars — one a pulsar and the other a white dwarf — helps astronomers understand how gravity works across the cosmos.

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.

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.

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 meal.

«Asteroid ripped apart to form star's glowing ring system: Research includes first image of ring system orbiting a white dwarf.»

A nova can occur if the strong gravity of a white dwarf pulls material from its orbiting companion star.

The measurement is the distance to SS Cygni, a star system consisting of a white dwarf plus a companion.

Editor's note: This story was updated January 19, 2018, to clarify the types of stars that become white dwarfs.

«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.

Basically embers of burned - out stars, white dwarfs cool off at a specific rate over time.

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 Earth.