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Binaries discovered by the SPY project. IV, Five single-lined DA double white dwarfs
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Nelemans, G., Napiwotzki, Ralf, Karl, C., Marsh, T. R., Voss, B., Roelofs, Gijs H. A., Izzard, R. G., Montgomery, M., Reerink, T., Christlieb, N. and Reimers, D. (2005) Binaries discovered by the SPY project. IV, Five single-lined DA double white dwarfs. Astronomy & Astrophysics, Vol.440 (No.3). pp. 1087-1095. doi:10.1051/0004-6361:20053174 ISSN 0004-6361.
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Official URL: http://dx.doi.org/10.1051/0004-6361:20053174
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 WD 0326−273. We briefly discuss the consequences of our findings for our understanding of the formation and evolution of double white dwarfs.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Library of Congress Subject Headings (LCSH): | Double stars, White dwarf stars | ||||
Journal or Publication Title: | Astronomy & Astrophysics | ||||
Publisher: | EDP Sciences | ||||
ISSN: | 0004-6361 | ||||
Official Date: | September 2005 | ||||
Dates: |
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Volume: | Vol.440 | ||||
Number: | No.3 | ||||
Page Range: | pp. 1087-1095 | ||||
DOI: | 10.1051/0004-6361:20053174 | ||||
Status: | Peer Reviewed | ||||
Access rights to Published version: | Open Access (Creative Commons) | ||||
Funder: | Nederlandse Organisatie voor Wetenschappelijk Onderzoek [Netherlands Organisation for Scientific Research] (NWO), Deutsche Forschungsgemeinschaft (DFG), Particle Physics and Astronomy Research Council (Great Britain) (PPARC), Carolune Institute for Quality Astronomy (CIQuA) | ||||
Grant number: | 639.041.405 (NWO), NA 365/3-1 (DFG), He 1356/40-3 (DFG), 639.042.201 (NWO), KO738/21-1 (DFG) |
Data sourced from Thomson Reuters' Web of Knowledge
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