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

P. D. Dobbie, M. R. Burleigh, A. J. Levan, M. A. Barstow, R. Napiwotzki, Ivan - Hubeny

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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.

Original languageEnglish (US)
Pages (from-to)1159-1163
Number of pages5
JournalAstronomy and Astrophysics
Volume439
Issue number3
DOIs
Publication statusPublished - Sep 2005

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Keywords

  • Stars: atmospheres
  • Stars: binaries: spectroscopic
  • Stars: individual: RE J0503-285
  • Stars: white dwarfs

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Dobbie, P. D., Burleigh, M. R., Levan, A. J., Barstow, M. A., Napiwotzki, R., & Hubeny, I. . (2005). A near-IR spectrum of the DO white dwarf RE J0503-285. Astronomy and Astrophysics, 439(3), 1159-1163. https://doi.org/10.1051/0004-6361:20053215