Sentences with phrase «white dwarf star»

These observations are the first to confirm a theory about a certain type of white dwarf star.

This could help them better understand how and why white dwarf stars explode.

I've been chewing on that question since I came across a provocative paper about searching for life around white dwarf stars.

The end product of its evolution, 7 billion years from now, will be a tiny white dwarf star.

It may be the remains of a carbon - rich white dwarf star.

This occurs when its companion becomes a big, cool star known as a red giant, before ending its life as a small and compact 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.

NEWSPAPER obituaries of Subrahmanyan Chandrasekhar, who died last month aged 84, all highlighted the single achievement for which he will be best remembered — his work on white dwarf stars.

Researchers studying the nebula say they have identified two orbiting white dwarf stars at its core.

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.

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

Several newly discovered white dwarf stars seem to have atmospheres consisting almost entirely of carbon.

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.

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.

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

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.

The jets have also been detected emanating from white dwarf stars, active stars, and supernovae.

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.

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

Astronomers announced today that they have spotted a large, rocky object disintegrating in its death spiral around a distant white dwarf 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.

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

For decades, astronomers treated the final bursts of tiny white dwarf stars known as type Ia supernovas like identical blasts, occurring the same way everywhere in the universe.

Then, after the sky survey is complete, scientists will use EUVE to study individual objects, such as young white dwarf stars.

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.

«It tells us that nature has found a way that we didn't know to make white dwarf stars without the usual hydrogen or helium surface layers,» Dufour says.

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.

Modern astronomy paints a vivid picture of the universe having been born in a cataclysmic bang and filled with exotic stars ranging from gargantuan red supergiants that span the size of a modest solar system to hyperdense white dwarf stars and black holes that are smaller than Earth.

This even dimmer, main sequence white dwarf star (DQ8 / VII) may have only 18/100, 000 th of Sol's luminosity.

Before she had even decided that she wanted to be an astronomer, she was already working with Professor Kepler de Souza Oliveira Filho, her current advisor, on the science behind pulsating white dwarf stars.

An artist's impression of the heart of planetary nebula Henize 2 - 428, where researchers have identified two white dwarf stars destined to merge and create a Type Ia supernova

The former — known technically as Type Ia supernovae — are thought to involve white dwarf stars, which are stars like our Sun but much older.

Astronomers from the University of Wisconsin - Milwaukee, led by David Kaplan, used the National Radio Astronomy Observatory's (NRAO) Green Bank Telescope and Very Long Baseline Array to discover the coolest and faintest white dwarf star to date.

So far, only about 10 percent of known pulsars are believed to be part of binary systems — most of them orbiting ancient white dwarf stars.

«We've known for some time that examining the accreted remains of rocky planets in the atmosphere of their host white dwarf star can give bulk chemical composition information, and now it looks like we can even hone in on specific layers of an accreted body in some fortuitous cases,» Melis said.

Using NASA's Hubble Space Telescope, astronomers have captured for the first time snapshots of fledgling white dwarf stars beginning their slow - paced, 40 - million - year migration from the crowded centre of giant globular cluster 47 Tucanae to the less populated suburbs.

He researches white dwarf stars.

The story began with observations by Justin Steinfadt, a UCSB physics graduate student who has been monitoring white dwarf stars as part of his Ph.D. thesis with Lars Bildsten, a professor and permanent member of UCSB's Kavli Institute for Theoretical Physics, and Steve Howell, an astronomer at the National Optical Astronomy Observatory (NOAO) in Tucson, Ariz..

In this artist conception of the unique binary star NLTT 11748, the larger but less massive helium white dwarf star is partially eclipsed by the smaller but more massive normal white dwarf, which is about the size of the earth.

If the white dwarf accretes enough material to reach the Chandrasekhar limit, the maximum mass of a stable white dwarf star (1.4 solar mass), it will likely explode as a Type Ia supernova.

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.

The study centers on white dwarf stars.

It orbits a companion white dwarf star and is one of the brightest, most stable pulsars known.

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.

Unfortunately, the JWST will only be powerful enough to detect such pollutants on Earth - like planets orbiting white dwarf stars, which are incredibly dense stellar remnants of Sun - like mass and Earth - like size.

As time progresses after the formation of a cluster, the massive stars, which evolve the fastest, gradually disappear from the cluster, becoming white dwarf stars or other underluminous stellar remnants.

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.

White dwarf stars are liquid fire that can not burn themselves out.