example of a white dwarf star. This is not the white dwarf from the article.
Astronomers have found a white dwarf star with an atmosphere dominated by oxygen. Such white dwarf was predicted, but had not yet been found.
A white dwarf is the final stage of stars like the sun. the universe, then left naked core at the end of their life they emit their outer layers. This has a very high density and therefore a massive gravity. As a consequence, heavy elements, such as oxygen and carbon, sink down. The result is a kind of atmosphere of light elements such as hydrogen and helium, the oxygen envelope and carbon core.
When the white dwarf in question, by going through life as SDSS J124043.01 + 671034.68 is said outer layer in the one way or the other disappeared. There are two explanations: You may have to make interactions with a companion star to ensure that the oxygen envelope is exposed. It is also possible that the white dwarf has had a sudden revival thermonuclear, wherein carbon from core is to merge to the outside. Here, the lighter elements are eliminated
Something strange way, there is yet to SDSS J124043.01 + 671034.68:. As it is a rare neon-magnesium white dwarf. Look, all the stars with less than ten solar masses will leave a white dwarf (star heavier than usually explode as a supernova, but that aside). This will usually an oxygen-carbon white dwarf is the result.
When stars that between eight and ten solar masses sit in contrast, is a heavier neon-magnesium white dwarf caused. However J124043.01 + 671034.68 is a fairly light white dwarf and would therefore have absolutely no neon and magnesium. That is indeed found, causing the white dwarf can be used to calibrate our models of stellar evolution and (where necessary) to modify
Sources. EurekAlert! and Science
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