Assertion: supernova's companion | /r/HasProperty | stellar
Facets:
Source sentences:
text: (The gas dumped onto it by its stellar companion is likely to be hydrogen and helium, but the strong gravity at the white dwarf's surface compresses it to densities and temperatures high enough to fuse it into carbon and oxygen.)
text: The final clue that led the researchers to conclude that in this case there had been a merger of two white dwarfs was that this supernova, about 7,000 light years from Earth, has no stellar companion to the white dwarf progenitor.