A search for Helium in Ultramassive White Dwarfs

Dupuis, Jean; Vennes, Stephane; Chayer, Pierre

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A search for Helium in Ultramassive White Dwarfs

Date

2002

Authors

Dupuis, Jean

Vennes, Stephane

Chayer, Pierre

Publisher

IOP Publishing

Abstract

We have obtained extreme ultraviolet (EUV) spectra of eight hot, ultramassive white dwarfs (M = 0.9-1.3 M⊙) with the Extreme Ultraviolet Explorer. The stars are, on average, twice as massive as normal white dwarfs. The relatively high turnout of ultrama