Binaries discovered by the SPY project IV. Five single-lined DA double white dwarfs

G. Nelemans; R. Napiwotzki; C. Karl; T.R. Marsh; B. Voss; G. Roelofs; R.G. Izzard; M. Montgomery; T. Reerink; N. Christlieb; D. Reimers

doi:10.1051/0004-6361:20053174

Binaries discovered by the SPY project IV. Five single-lined DA double white dwarfs

G. Nelemans, R. Napiwotzki, C. Karl, T.R. Marsh, B. Voss, G. Roelofs, R.G. Izzard, M. Montgomery, T. Reerink, N. Christlieb, D. Reimers

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Abstract

We present results from our ongoing follow-up observations of double white dwarf binaries detected in the ESO SN Ia Progenitor SurveY (SPY). We discuss our observing strategy and data analysis and present the orbital solutions of five close double white dwarf binaries: HE0320−1917, HE1511−0448, WD0326−273, WD1013−010 and WD1210+140. Their periods range from 0.44 to 3.22 days. In none of these systems we find any spectral lines originating from the companion. This rules out main sequence companions and indicates that the companion white dwarfs are significantly older and cooler than the bright component. Infrared photometry suggests the presence of a cool, helium-rich white dwarf companion in the binary WD0326−273. We briefly discuss the consequences of our findings for our understanding of the formation and evolution of double white dwarfs.

Original language	English
Pages (from-to)	1087-1095
Journal	Astronomy and Astrophysics
Volume	440
DOIs	https://doi.org/10.1051/0004-6361:20053174
Publication status	Published - 2005

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@article{b354d76a9b55412c9d5f74a463a79f76,

title = "Binaries discovered by the SPY project IV. Five single-lined DA double white dwarfs",

abstract = "We present results from our ongoing follow-up observations of double white dwarf binaries detected in the ESO SN Ia Progenitor SurveY (SPY). We discuss our observing strategy and data analysis and present the orbital solutions of five close double white dwarf binaries: HE0320−1917, HE1511−0448, WD0326−273, WD1013−010 and WD1210+140. Their periods range from 0.44 to 3.22 days. In none of these systems we find any spectral lines originating from the companion. This rules out main sequence companions and indicates that the companion white dwarfs are significantly older and cooler than the bright component. Infrared photometry suggests the presence of a cool, helium-rich white dwarf companion in the binary WD0326−273. We briefly discuss the consequences of our findings for our understanding of the formation and evolution of double white dwarfs.",

author = "G. Nelemans and R. Napiwotzki and C. Karl and T.R. Marsh and B. Voss and G. Roelofs and R.G. Izzard and M. Montgomery and T. Reerink and N. Christlieb and D. Reimers",

note = "Original article can be found at: http://www.aanda.org/--Copyright The European Southern Observatory (ESO) DOI : 10.1051/0004-6361:20053174",

year = "2005",

doi = "10.1051/0004-6361:20053174",

language = "English",

volume = "440",

pages = "1087--1095",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

TY - JOUR

T1 - Binaries discovered by the SPY project IV. Five single-lined DA double white dwarfs

AU - Nelemans, G.

AU - Napiwotzki, R.

AU - Karl, C.

AU - Marsh, T.R.

AU - Voss, B.

AU - Roelofs, G.

AU - Izzard, R.G.

AU - Montgomery, M.

AU - Reerink, T.

AU - Christlieb, N.

AU - Reimers, D.

N1 - Original article can be found at: http://www.aanda.org/--Copyright The European Southern Observatory (ESO) DOI : 10.1051/0004-6361:20053174

PY - 2005

Y1 - 2005

N2 - We present results from our ongoing follow-up observations of double white dwarf binaries detected in the ESO SN Ia Progenitor SurveY (SPY). We discuss our observing strategy and data analysis and present the orbital solutions of five close double white dwarf binaries: HE0320−1917, HE1511−0448, WD0326−273, WD1013−010 and WD1210+140. Their periods range from 0.44 to 3.22 days. In none of these systems we find any spectral lines originating from the companion. This rules out main sequence companions and indicates that the companion white dwarfs are significantly older and cooler than the bright component. Infrared photometry suggests the presence of a cool, helium-rich white dwarf companion in the binary WD0326−273. We briefly discuss the consequences of our findings for our understanding of the formation and evolution of double white dwarfs.

AB - We present results from our ongoing follow-up observations of double white dwarf binaries detected in the ESO SN Ia Progenitor SurveY (SPY). We discuss our observing strategy and data analysis and present the orbital solutions of five close double white dwarf binaries: HE0320−1917, HE1511−0448, WD0326−273, WD1013−010 and WD1210+140. Their periods range from 0.44 to 3.22 days. In none of these systems we find any spectral lines originating from the companion. This rules out main sequence companions and indicates that the companion white dwarfs are significantly older and cooler than the bright component. Infrared photometry suggests the presence of a cool, helium-rich white dwarf companion in the binary WD0326−273. We briefly discuss the consequences of our findings for our understanding of the formation and evolution of double white dwarfs.

U2 - 10.1051/0004-6361:20053174

DO - 10.1051/0004-6361:20053174

M3 - Article

SN - 0004-6361

VL - 440

SP - 1087

EP - 1095

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

ER -

Binaries discovered by the SPY project IV. Five single-lined DA double white dwarfs

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