UV spectroscopy of the hot bare stellar core H1504+65 with the HST Cosmic Origins Spectrograph

  title={UV spectroscopy of the hot bare stellar core H1504+65 with the HST Cosmic Origins Spectrograph},
  author={Klaus Werner and Thomas Rauch},
  journal={Astrophysics and Space Science},
  • K. WernerT. Rauch
  • Published 27 January 2011
  • Physics, Geology
  • Astrophysics and Space Science
We present new ultraviolet spectra of the hottest known, peculiar white dwarf H1504+65, obtained with the Cosmic Origins Spectrograph on the Hubble Space Telescope. H1504+65 is the hottest known white dwarf (Teff=200 000 K) and has an atmosphere mainly composed by carbon and oxygen, augmented with high amounts of neon and magnesium. This object is unique and the origin of its surface chemistry is completely unclear. We probably see the naked core of either a C–O white dwarf or even a O–Ne–Mg… 



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