Sentences with phrase «own hydrogen envelope»

This allowed the international team to determine that the explosion was a Type IIb supernova: the explosion of a massive star that had previously lost most of its hydrogen envelope, a species of exploding star first observationally identified by Filippenko in 1987.

Its outer hydrogen envelope becomes more loosely bound and vulnerable to gravitational stripping, or a type of stellar cannibalism, by the nearby companion star.

Sporadic changes in the wind strength or the rate the companion star strips the main star's hydrogen envelope might also explain the clumpy structure and gaps seen farther out in the disk.

In that process, the more compact star winds up gaining mass, and the original massive star loses its hydrogen envelope, exposing its helium core to become a Wolf - Rayet star.

Another way Wolf - Rayet stars are said to form is when a massive star ejects its own hydrogen envelope in a strong stellar wind streaming with charged particles.

The one GOOD thing about these direct hits would be ELIMINATION of thick Hydrogen envelopes around these types of planets when these envelopes were HEATED by MUCH MORE LUMINOUS HOST STARS to the point where the envelopes FILLED the planets» Hill spheres.

Not exact matches

One way to account for this is through the behavior of its massive envelope of hydrogen and helium gases.

Type Ic supernovae, the explosions after the core collapse of massive stars that have previously lost their hydrogen and helium envelopes, are particularly interesting because of their link with long - duration gamma ray bursts.

Kepler - 296f is twice the size of Earth, but scientists do not know whether the planet is a gaseous world, with a thick hydrogen - helium envelope, or it is a water world surrounded by a deep ocean.

But in many instances, the simulations show, even planets starting with rocky cores as little as 1.5 Earth's mass may trap and hold atmospheres containing between 100 and 1000 times the amount of hydrogen found in the water in Earth's oceans — thick, dense envelopes exerting pressures so hellish that life on the planets» surfaces might be almost impossible.

Computer simulations show that planets similar to or larger in mass than the Earth that are born with thick envelopes of hydrogen and helium are likely to retain their stifling atmospheres.

Eventually, Stars Aa and Ab will lose much of their current mass, from intensified stellar winds that eventually puff out their outer gas envelopes of hydrogen and helium (and lesser amounts of higher elements such as carbon and oxygen) into interstellar space as planetary nebulae.

Information about the ang... ▽ More When the core hydrogen is exhausted during stellar evolution, the central region of a star contracts and the outer envelope expands and cools, giving rise to a red giant, in which convection occupies a large fraction of the star.

Theoretical modelling indicate that a hot steam planet could form if it formed in a colder orbit farther from GJ 1214, where lower temperatures would have created an ice - rock composition similar to Jupiter's moon Ganymede, and the planet should have formed too late to accrete a large hydrogen - helium gas envelope.

Abstract: When the core hydrogen is exhausted during stellar evolution, the central region of a star contracts and the outer envelope expands and cools, giving rise to a red giant, in which convection occupies a large fraction of the star.

A new super-Earth with around 10 Earth - masses (that may have a gaseous atmospheric envelope of hydrogen and helium like Uranus) has been detected in a cold orbit around a dim, low - mass star aroud 9,900 light - years away (more).