Using large spectroscopic surveys to test the double degenerate model for Type Ia supernovae
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Cita com:
hdl:2117/116644
Tipus de documentArticle
Data publicació2017-02-20
Condicions d'accésAccés obert
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ProjecteWDTRACER - White Dwarfs as Tracers of Stellar, Binary and Planetary Evolution (EC-FP7-320964)
WD3D - Evolution of white dwarfs with 3D model atmospheres (EC-H2020-677706)
WD3D - Evolution of white dwarfs with 3D model atmospheres (EC-H2020-677706)
Abstract
An observational constraint on the contribution of double degenerates to Type Ia supernovae requires multiple radial velocity measurements of ideally thousands of white dwarfs. This is because only a small fraction of the double degenerate population is massive enough, with orbital periods short enough, to be considered viable Type Ia progenitors. We show how the radial velocity information available from public surveys such as the Sloan Digital Sky Survey can be used to pre-select targets for variability, leading to a 10-fold reduction in observing time required compared to an unranked or random survey. We carry out Monte Carlo simulations to quantify the detection probability of various types of binaries in the survey and show that this method, even in the most pessimistic case, doubles the survey size of the largest survey to date (the SPY Survey) in less than 15 per cent of the required observing time. Our initial follow-up observations corroborate the method, yielding 15 binaries so far (eight known and seven new), as well as orbital periods for four of the new binaries.
Descripció
This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record Monthly Notices of the Royal Astronomical Society, Volume 468, Issue 3, 1 July 2017, Pages 2910–2922, https://doi.org/10.1093/mnras/stx430 is available online at: https://academic.oup.com/mnras/article-abstract/468/3/2910/3038256/Using-large-spectroscopic-surveys-to-test-the?redirectedFrom=fulltext
CitacióBreedt, E., Steeghs, D., Marsh, T., Gentile, N., Tremblay, P., Green, M., De Pasquale, S., Hermes, J., Gänsicke, B. T., Parsons, S., Bours, M., Longa, P., Rebassa, A. Using large spectroscopic surveys to test the double degenerate model for Type Ia supernovae. "Monthly notices of the Royal Astronomical Society", 20 Febrer 2017, vol. 468, núm. 3, p. 2910-2922.
ISSN0035-8711
Col·leccions
Fitxers | Descripció | Mida | Format | Visualitza |
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1702.05117.pdf | Author's Accepted Manuscript | 2,423Mb | Visualitza/Obre |