Abundance analysis of DAZ white dwarfs

Details Abundance analysis of DAZ white dwarfs Abundance analysis of DAZ white dwarfs

2010-12-13

arxiv.org/abs/1012.2639v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Part of PlanetsbeyondMS/2010 proceedings http://arxiv.org/html/1011.6606

Scientific paper

We present an abundance analysis of a sample of 33 hydrogen-rich (DA) white dwarfs. We have used archival high-resolution spectra to measure abundances of calcium, magnesium and iron in a set of 30 objects. In addition, we present preliminary calcium abundances in three new white dwarfs based on low-dispersion spectra. We investigate some abundance ratios (Mg/Ca, Fe/Ca) that may help uncover the composition of the accretion source.

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