A near-IR spectrum of the DO white dwarf RE J0503-285

Andrew Levan (1); Ivan Hubeny (2). ((1) University of Leicester; Martin Barstow (1); Matt Burleigh (1); Paul Dobbie (1); Ralf Napiwotzki (1); UK). ((2) Steward Observatory; University of Arizona)

arxiv: astro-ph/0506384 · v1 · submitted 2005-06-16 · 🌌 astro-ph

A near-IR spectrum of the DO white dwarf RE J0503-285

Paul Dobbie (1) , Matt Burleigh (1) , Andrew Levan (1) , Martin Barstow (1) , Ralf Napiwotzki (1) , Ivan Hubeny (2). ((1) University of Leicester , UK). ((2) Steward Observatory , University of Arizona) This is my paper

classification 🌌 astro-ph

keywords companiondwarfwhitej0503-285msunnear-irspectrumabundances

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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<0.085Msun). This result rules out ongoing interaction between the white dwarf and a close companion with M>0.085Msun 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.

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A near-IR spectrum of the DO white dwarf RE J0503-285

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