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A near-IR spectrum of the DO white dwarf RE J0503-285
journal contribution
posted on 2023-05-17, 14:36 authored by Dobbie, PD, Burleigh, MR, Levan, AJ, Barstow, MA, Napiwotzki, R, Hubeny, IWe 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.
History
Publication title
Astronomy and Astrophysics: A European JournalVolume
439Pagination
1159 - 1163ISSN
0004-6361Department/School
School of Natural SciencesPublisher
E D P SciencesPlace of publication
7, Ave Du Hoggar, Parc D Activites Courtaboeuf, Bp 112, Les Ulis Cedexa, France, F-91944Rights statement
Copyright 2005 ESO.Repository Status
- Restricted