Sentences with phrase «rich white dwarf»
It may be the remains of a carbon - rich white dwarf star.
https://www.scientificamerican.com/ Not exact matches
Creating so much oxygen takes a fiercer nuclear furnace than is needed for a carbon - rich mixture, so the stars that became these white dwarfs must have been hot and massive.
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.
And that pressure, acting on the carbon - rich makeup of the white dwarf, may have crystallized much of it to the particular form of carbon we call diamond.
The impact of water - rich asteroids or comets onto a planet or white dwarf results in the mixing of hydrogen and oxygen into the atmosphere.
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.»
Artist's impression of a rocky and water - rich asteroid being torn apart by the strong gravity of the white dwarf star.
As a white dwarf draws off hydrogen - rich material from a binary companion over millions of years, Gilfanov says, it experiences a steady process of nuclear fusion on its surface that gives off tremendous amounts of radiation.
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.
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.
This is the first time a white dwarf with nitrogen has been discovered, and one of only a few known examples of white dwarfs that have been impacted by a rocky body that was rich in water ice.
HD 147513 A is a so - called young «Barium dwarf» (s - process element rich but comparatively carbon deficient) star that was probably enriched by an asymptotic branch giant (AGB) star (see Gacrux) but is now a very dim, white dwarf companion, which has an observed separation of around 4,400 AUs — 5.7» at a HIPPARCOS distance estimate of 42.0 ly (Porto de Mello and da Silva, 1997; and Poveda et al, 1993, pp. 74 - 75).