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Title: A near-IR spectrum of the DO white dwarf RE J0503-285
Authors: Dobbie, P.D.
Burleigh, Matthew R.
Levan, Andrew J.
Barstow, Martin A.
Napiwotzki, R.
Hubeny, I.
First Published: 2005
Publisher: EDP Sciences
Citation: Astronomy and Astrophysics, 2005, 439, pp.1159-1163
Abstract: We present a near-IR spectroscopic analysis of the intriguing DO white dwarf RE J0503-285. The IR spectrum fails to reveal evidence of the presence of a spatially unresolved, cool, late-type companion. Hence we have placed an approximate limit on the spectral-type and mass of a putative companion (later than M8, M < 0.085 M¤). This result rules out ongoing interaction between the white dwarf and a close companion with M ≥ 0.085 M¤ as responsible for the discrepancies between the observed photospheric abundances and model predictions. As the possibility remains that there is a cooler companion lying beyond the detection threshold of this study we use our modelling to estimate the improvement in sensitivity offered by a Spitzer observation.
Type: Article
Description: The definitive version of this paper is available from
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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