Post common envelope binaries from SDSS. XII : the orbital period distribution
Nebot Gómez-Morán, Ada, Gaensicke, B. T. (Boris T.), Schreiber, Matthias R., Rebassa-Mansergas, A., Schwope, A. D. (Axel D.), Southworth, J. (John), Aungwerojwit, A. (Amornrat), Bothe, M., Davis, P. J., Kolb, Ulrich, Müller, M., Papadaki, C., Pyrzas, S., Rabitz, A., Rodriguez-Gil, P., Schwarz, R. (Robert), Schmidtobreick, Linda, Tappert, Claus and Toloza, O.. (2011) Post common envelope binaries from SDSS. XII : the orbital period distribution. Astronomy & Astrophysics, Vol.536 (A43). ISSN 0004-6361Full text not available from this repository.
Official URL: http://dx.doi.org/10.1051/0004-6361/201117514
Context. The complexity of the common-envelope phase and of magnetic stellar wind braking currently limits our understanding of close binary evolution. Because of their intrinsically simple structure, observational population studies of white dwarf plus main sequence (WDMS) binaries can potentially test theoretical models and constrain their parameters.
Aims. The Sloan Digital Sky Survey (SDSS) has provided a large and homogeneously selected sample of WDMS binaries, which we characterise in terms of orbital and stellar parameters.
Methods. We have obtained radial velocity information for 385 WDMS binaries from follow-up spectroscopy and for an additional 861 systems from the SDSS subspectra. Radial velocity variations identify 191 of these WDMS binaries as post common-envelope binaries (PCEBs). Orbital periods of 58 PCEBs were subsequently measured, predominantly from time-resolved spectroscopy, bringing the total number of SDSS PCEBs with orbital parameters to 79. Observational biases inherent to this PCEB sample were evaluated through extensive Monte Carlo simulations.
Results. We find that 21.24% of all SDSS WDMS binaries have undergone common-envelope evolution, which is in good agreement with published binary population models and high-resolution HST imaging of WDMS binaries unresolved from the ground. The biascorrected orbital period distribution of PCEBs ranges from 1.9 h to 4.3 d and approximately follows a normal distribution in log(P orb ), peaking at 10:3 h. There is no observational evidence for a significant population of PCEBs with periods in the range of days to weeks.
Conclusions. The large and homogeneous sample of SDSS WDMS binaries provides the means to test fundamental predictions of binary population models, hence to observationally constrain the evolution of all close compact binaries.
|Item Type:||Journal Article|
|Subjects:||Q Science > QB Astronomy|
|Divisions:||Faculty of Science > Physics|
|Library of Congress Subject Headings (LCSH):||Stars, New, Cataclysmic variable stars, Double stars, White dwarf stars|
|Journal or Publication Title:||Astronomy & Astrophysics|
|Official Date:||December 2011|
|Number of Pages:||20|
|Access rights to Published version:||Restricted or Subscription Access|
|Funder:||Centre national d'études spatiales (France) (CNES), Science and Technology Facilities Council (Great Britain) (STFC), Deutsches Zentrum für Luft- und Raumfahrt (DLR), Fondo Nacional de Desarrollo Científico y Tecnológico (Chile) (FONDECYT), Universidad de Valparaíso. Centro de Astrofísica, Deutsche Forschungsgemeinschaft (DFG)|
|Grant number:||60015 (CNES), FKZ 50 OR 0404 (DLR), 1100782 (FONDECYT), 3110049 (FONDECYT), Schw 536/26- 1, 29-1, 30-1, 31-1, 32-1, 33-1, and 34-1 (DFG)|
Abazajian, K. N., Adelman-McCarthy, J. K., Agüeros, M. A., et al. 2009, ApJS,
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