An ultra-massive white dwarf with a mixed hydrogen-carbon atmosphere as a likely merger remnant
White dwarfs are dense, cooling stellar embers consisting mostly of carbon and oxygen 1, or oxygen and neon (with a few per cent carbon) at higher initial stellar masses 2. These stellar cores are enveloped by a shell of helium, which in turn, is usually surrounded by a layer of hydrogen, generally prohibiting direct observation of the interior
Hollands, M. A. et al.
Fecha de publicación:
3
2020