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The white dwarf binary pathways survey – I. a sample of FGK stars with white dwarf companions
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Parsons, S. G., Rebassa-Mansergas, A., Schreiber, M. R., Gänsicke, B. T. (Boris T.), Zorotovic, M. and Ren, J. J. (2016) The white dwarf binary pathways survey – I. a sample of FGK stars with white dwarf companions. Monthly Notices of the Royal Astronomical Society, 463 (2). pp. 2125-2136. doi:10.1093/mnras/stw2143 ISSN 0035-8711.
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Official URL: http://dx.doi.org/10.1093/mnras/stw2143
Abstract
The number of spatially unresolved white dwarf plus main-sequence star binaries has increased rapidly in the last decade, jumping from only ∼30 in 2003 to over 3000. However, in the majority of known systems the companion to the white dwarf is a low-mass M dwarf, since these are relatively easy to identify from optical colours and spectra. White dwarfs with more massive FGK type companions have remained elusive due to the large difference in optical brightness between the two stars. In this paper, we identify 934 main-sequence FGK stars from the Radial Velocity Experiment survey in the Southern hemisphere and the Large Sky Area Multi-Object Fiber Spectroscopic Telescope survey in the Northern hemisphere, that show excess flux at ultraviolet wavelengths which we interpret as the likely presence of a white dwarf companion. We obtained Hubble Space Telescope ultraviolet spectra for nine systems which confirmed that the excess is indeed caused, in all cases, by a hot compact companion, eight being white dwarfs and one a hot subdwarf or pre-helium white dwarf, demonstrating that this sample is very clean. We also address the potential of this sample to test binary evolution models and Type Ia supernovae formation channels.
| Item Type: | Journal Article | ||||||||
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| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
| Library of Congress Subject Headings (LCSH): | White dwarf stars, Double stars, Low mass stars, Astrophysics | ||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society | ||||||||
| Publisher: | Oxford University Press | ||||||||
| ISSN: | 0035-8711 | ||||||||
| Official Date: | 25 August 2016 | ||||||||
| Dates: |
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| Volume: | 463 | ||||||||
| Number: | 2 | ||||||||
| Page Range: | pp. 2125-2136 | ||||||||
| DOI: | 10.1093/mnras/stw2143 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||
| Date of first compliant deposit: | 13 March 2017 | ||||||||
| Date of first compliant Open Access: | 14 March 2017 | ||||||||
| Funder: | Fondo Nacional de Desarrollo Científico y Tecnológico (Chile) (FONDECYT), Spain. Ministerio de Economía y Competitividad [Ministry of Economy and Competitiveness] (MINECO), L'Agència de Gestió d'Ajuts Universitaris i de Recerca (AGAUR), Seventh Framework Programme (European Commission) (FP7), European Research Council (ERC), Chile. Ministerio de Economía, Zhōngguó zhèjiāng shěng zìrán kēxué jījīn (China) [Zhejiang Provincial Natural Science Foundation of China] (ZPNSFC), Zhongguo ke xue yuan. Shanghai sheng ming ke xue yan jiu yuan [Chinese Academy of Sciences. Shanghai Institutes for Biological Sciences] (SIBS) | ||||||||
| Grant number: | 3140585 (FONDECYT), 3130559 (FONDECYT), AYA2014-59084-P (MINECO), FP/2007-2013 (FP7), no. 320964 (ERC), 1141269 (FONDECYT ), P10-022-F (ZPNSCF), 2014CB845700 (SIBS) |
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