Sentences with phrase «from white dwarfs»

In a study published in the February 18 issue of Nature, Gilfanov and Bogdán report that they found just a fraction of the x-rays expected from white dwarfs accreting matter from their neighbors.

They also are orbiting very close to the tidal radius, or distance at which gravitational tides from the white dwarf can rip apart a rocky body.

Kailash Sahu and colleagues at the Space Telescope Science Institute in Baltimore, Maryland, measured bending light from white dwarf Stein 2051 B as it moved in front of another star over two years.

A Type Ia supernova results from a white dwarf that's part of a binary system (that is, one that shares an orbit with another star) and was about twice the size of our sun during its life.

In the new study, the researchers saw the elements in the white dwarf's atmosphere because they absorbed some of the background light from the white dwarf.

Radiation from the white dwarf star, the white dot in the center of the ring, is exciting the helium to glow.

Not exact matches

At the same time, the film harks back to Disney's first - ever fairy - tale feature, 1937's Snow White and the Seven Dwarfs, with its story of a princess in disguise living hidden in a forest; a villainess with access to supernatural powers; a supporting cast of lovable eccentrics; frolicking animal friends; and a handsome prince who awakens the heroine from a deathlike sleep with love's first kiss.

Millennium Park has a special daytime screening of «Snow White and the Seven Dwarfs» to celebrate its 80th anniversary (Aug. 24), complete with a short program from the Family Fun Festival.

At least Bercow has solace on hand from his wife, Sally, who tweeted: «If Mr B's a dwarf then I'm Snow White.

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.

Dr Simon Vaughan, Reader in Observational Astronomy at the University of Leicester's Department of Physics and Astronomy, explained: «The seemingly random fluctuations we see from the black holes and white dwarfs look remarkably similar to those from the young stellar objects — it is only the tempo that changes.»

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

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.

While combing through data from the Sloan Digital Sky Survey (SDSS), Souza Oliveira Kepler et al. identified SDSS J124043.01 +671034.68, a white dwarf with its outer layer of light elements stripped away, revealing a nearly pure layer of oxygen.

Matter falling from a companion star onto a white dwarf might have induced a thermonuclear chain reaction that forced the dwarf to expand radically without exploding into a more common nova, Bond notes.

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

The white dwarf is roughly 170 light - years from Earth in the constellation Bootes, the Herdsman.

The Hubble Space Telescope's recent discovery of the earliest known Type Ia supernova from more than 10 billion years ago, plus other results, favor a scenario in which two white dwarfs merge.

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

The event was what's known as a classical nova explosion, which occurs when a dense stellar corpse called a white dwarf steals enough material from an ordinary companion star for its gas to spontaneously ignite.

A definitive answer should come within a year or two from several ongoing white dwarf surveys that are probing farther into the halo.

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.

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.

The blast from one of the Milky Way supernovas, which Rest has seen from different angles, looks symmetric, suggesting it was the result of a white dwarf stealing from its companion until it exploded — a typical type Ia.

But if the supernova came from two white dwarfs colliding, its debris would have shot out unevenly, with some material flying faster in one direction than another.

A large oxygen - dominated core from the seismic cartography of a pulsating white dwarf.

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

That configuration would help it pinpoint the sources of gravitational waves on the sky and allow it to see the longer - wavelength ripples from a wider range of sources including binary white dwarfs, slower - spinning pulsars and intermediate - mass black holes weighing hundreds or thousands of suns.

All type 1a evolve from a type of star called a white dwarf, but pinning down exactly which white dwarfs are supernova precursors could lead to much more precise measurements of dark energy — and even reveal its true nature.

That increase in light, rather than the dip Kruse thought he'd see, was the white dwarf bending and magnifying light from its more distant neighbor through gravitational lensing, like a magnifying glass.

Another, less common kind of supernova, type 1a, occurs when a remnant of a star called a white dwarf steals matter from a companion star until the white dwarf explodes (SN: 4/30/16, p. 20).

At first glance this exploding star had all the features of a type Ia supernova, which happens when a small, dense white dwarf star steals material from an orbiting companion and then explodes.

Sandage's preferred method is to use type Ia supernovae, which arise when a white dwarf star gathers material from a companion and explodes.

But some scientists have suggested the fast - moving stars near the cluster centres could instead result from the gravity of many dim, dead stars such as white dwarfs or neutron stars.

That is because white dwarfs are 1000 times dimmer than stars like the Sun, which are so bright that they overwhelm any reflected light from planets around them.

When Sigurdsson and colleagues analyzed images of the white dwarf from the Hubble Space Telescope, they concluded that the distant, unseen companion is not a low - mass star, as many researchers had thought, but a planet with about 2.5 times the mass of Jupiter.

Dust and debris from the break - up would then fall into the white dwarf, depositing heavy elements there.

[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.

Due to their close proximity, the white dwarf strips mass from its low - mass companion.

The explosion was a Type Ia supernova, the most luminous variety, which occurred when a small, dense star known as a white dwarf blew up about 7000 light - years from Earth.

The spacecraft's telescopes are sensitive to radiation from the hot outer atmospheres of stars like the Sun and white dwarfs, formed when stars about the size of the Sun reach the end of their lives.

The team studied the spectra, or chemical signatures, of the light from 146 white dwarfs located within a few hundred light - years of Earth.

A stellar ember called a white dwarf exploded after gorging on material stolen from its neighbour.

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 UCSB - led research implies that the white dwarf was stealing matter from a much larger companion star — approximately 20 times the radius of the sun — which caused the white dwarf to explode.

As general relativity predicts, light from the background star bent around the white dwarf, distorted by its gravitational field.

Astronomers thought white dwarfs gained mass from a companion star, but about half of the type Ia supernovae show no signs of a companion.

Type Ia supernovae, often used to calibrate cosmological measurements, may arise from merging white dwarfs, after all

The first so - called helium nova, the possible result of a large white dwarf sucking material from a hydrogen - deficient companion star, may be a precursor to a supernova

The white dwarf accretes material from the companion star, then at some point, it might explode as a type Ia supernova.