4 papers
Towards a standardised line list for G191-B2B, and other DA type objects
Simon P. Preval, Martin A. Barstow, Jay B. Holberg +1
We present a comprehensive analysis of the far UV spectrum of G191-B2B over the range of 900-1700Å using co-added data from the FUSE and STIS archives. While previous identificatio…
An analysis of metallic high ion absorption line profiles at DA white dwarfs with circumstellar material
Nathan J. Dickinson, Martin A. Barstow, Barry Y. Welsh
Some hot DA stars exhibit circumstellar absorption in the metal resonance lines in their spectra. In many cases, these circumstellar features are unresolved from those originating…
The metal content of hot DA white dwarf spectra
Nathan Dickinson
A study of high ion metal absorption features present in the spectra of hot DA white dwarfs is presented. An analysis of three DAs is performed, where previous studies came to conf…
On the Origin of Metals in Some Hot White Dwarf Photospheres
M. R. Burleigh, M. A. Barstow, J. Farihi +6
We have searched for evidence for dust and gas disks at a sample of hot DA white dwarfs 20 000K < Teff < 50 000K, without success. Although their atmospheres are polluted with heav…