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; I. Hubeny

doi:10.1051/0004-6361:20053215

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, I. Hubeny

Steward Observatory

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

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 language	English (US)
Pages (from-to)	1159-1163
Number of pages	5
Journal	Astronomy and astrophysics
Volume	439
Issue number	3
DOIs	https://doi.org/10.1051/0004-6361:20053215
State	Published - Sep 2005

Keywords

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

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1051/0004-6361:20053215

Cite this

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title = "A near-IR spectrum of the DO white dwarf RE J0503-285",

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.",

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T1 - A near-IR spectrum of the DO white dwarf RE J0503-285

AU - Dobbie, P. D.

AU - Burleigh, M. R.

AU - Levan, A. J.

AU - Barstow, M. A.

AU - Napiwotzki, R.

AU - Hubeny, I.

PY - 2005/9

Y1 - 2005/9

N2 - 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.

AB - 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.

KW - Stars: atmospheres

KW - Stars: binaries: spectroscopic

KW - Stars: individual: RE J0503-285

KW - Stars: white dwarfs

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JO - Astronomy and astrophysics

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IS - 3

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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