| Issue |
A&A
Volume 439, Number 3, September I 2005
|
|
|---|---|---|
| Page(s) | 1159 - 1163 | |
| Section | Stellar atmospheres | |
| DOI | https://doi.org/10.1051/0004-6361:20053215 | |
| Published online | 12 August 2005 | |
Research Note
A near-IR spectrum of the DO white dwarf RE J0503-285
1
Dept. of Physics & Astronomy, University of Leicester, Leicester LE1 7RH, UK e-mail: [pdd;mbu;anl;mab]@star.le.ac.uk
2
Dept. of Astronomy and Steward Observatory, University of Arizona, Tucson, AZ 85721, USA e-mail: hubeny@as.arizona.edu
Received:
8
April
2005
Accepted:
13
June
2005
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, 
). This result rules
out ongoing interaction between the white dwarf and a close companion with
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.
Key words: stars: white dwarfs / stars: atmospheres / stars: binaries: spectroscopic / stars: individual: RE J0503-285
© ESO, 2005
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