The period distribution of eclipsing and spectroscopic binary systems, II

Antonello, E.; Farinella, P.; Guerrero, G.; Mantegazza, L.; Paolicchi, Paolo

doi:10.1007/bf00639144

Cited by 3 publications

(3 citation statements)

References 2 publications

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“…This is possibly due to red giants, which cannot be in short period systems. This possibility is problematic since it contradicts the unimodal results of previous period distribution studies (Farinella et al 1979;Antonello et al 1980;Duquennoy & Mayor 1991). In addition, figure 11 shows that with additional filtrations, the grouping of systems around the 100-day period is greatly reduced.…”

Section: Population Distributionsmentioning

confidence: 86%

Solutions for 10,000 Eclipsing Binaries in the Bulge Fields of OGLE II Using DEBiL

Devor

2005

ApJ

122

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We have developed a fully-automated pipeline for systematically identifying and analyzing eclipsing binaries within large datasets of light curves. The pipeline is made up of multiple tiers which subject the light curves to increasing levels of scrutiny. After each tier, light curves that did not conform to a given criteria were filtered out of the pipeline, reducing the load on the following, more computationally intensive tiers. As a central component of the pipeline, we created the fully automated Detached Eclipsing Binary Light curve fitter (DEBiL), which rapidly fits large numbers of light curves to a simple model. Using the results of DEBiL, light curves of interest can be flagged for follow-up analysis. As a test case, we analyzed the 218699 light curves within the bulge fields of the OGLE II survey and produced 10862 model fits 1 . We point out a small number of extreme examples as well as unexpected structure found in several of the population distributions. We expect this approach to become increasingly important as light curve datasets continue growing in both size and number.1 The list of OGLE II bulge fields model solutions as well as the latest version of the DEBiL source code are available online at:

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Section: Population Distributionsmentioning

confidence: 86%

Solutions for 10,000 Eclipsing Binaries in the Bulge Fields of OGLE II Using DEBiL

Devor

2005

ApJ

122

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“…Eclipsing binaries are important tools for investigating stellar parameters, but with periods and eclipse-depths taken as provided by Nature. Some pioneering statistics for the perioddistributions for eclipsing binaries of different types were given by Farinella & Paolicchi (1978) and Antonello et al (1980), but the distribution of the eclipse-depths has less often been studied in its own right. An important reason is that such statistics are very incomplete.…”

Section: Introductionmentioning

confidence: 99%

Eclipsing binary statistics – Theory and observation

Söderhjelm

Dischler

2005

A&A

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The expected distributions of eclipse-depth versus period for eclipsing binaries of different luminosities are derived from large-scale population synthesis experiments. Using the rapid Hurley et al. BSE binary evolution code, we have evolved several hundred million binaries, starting from various simple input distributions of masses and orbit-sizes. Eclipse probabilities and predicted distributions over period and eclipsedepth (P/∆m) are given in a number of main-sequence intervals, from O-stars to brown dwarfs. The comparison between theory and Hipparcos observations shows that a standard (Duquennoy & Mayor) input distribution of orbit-sizes (a) gives reasonable numbers and P/∆m-distributions, as long as the mass-ratio distribution is also close to the observed flat ones. A random pairing model, where the primary and secondary are drawn independently from the same IMF, gives more than an order of magnitude too few eclipsing binaries on the upper main sequence. For a set of eclipsing OB-systems in the LMC, the observed period-distribution is different from the theoretical one, and the input orbit distributions and/or the evolutionary environment in LMC has to be different compared with the Galaxy. A natural application of these methods are estimates of the numbers and properties of eclipsing binaries observed by large-scale surveys like Gaia.

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“…This is possibly due to red giants, which cannot be in short-period systems. This possibility is problematic since it contradicts the unimodal results of previous period distribution studies (Farinella et al 1979;Antonello et al 1980;Duquennoy & Mayor 1991). In addition, figure 2.11 shows that with additional filtrations, the grouping of systems around the 100-day period is greatly reduced.…”

Section: Population Distributionsmentioning

confidence: 88%

On the Development and Applications of Automated Searches for Eclipsing Binary Stars

Devor

2008

Preprint

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Eclipsing binary star systems provide the most accurate method of measuring both the masses and radii of stars. Moreover, they enable testing tidal synchronization and circularization theories, as well as constraining models of stellar structure and dynamics. With the recent availability of large-scale multi-epoch photometric datasets we were able to study eclipsing binary stars en masse. In this thesis, we analyzed 185,445 light curves from ten TrES fields, and 218,699 light curves from the OGLE II bulge fields. In order to manage such large quantities of data, we developed a pipeline with which we systematically identified eclipsing binaries, solved for their geometric orientations, and then found their components' absolute properties. Following this analysis we assembled catalogs of eclipsing binaries with their models, computed statistical distributions of their properties, and located rare cases for further follow-up, including T-Cyg1-03378, which has unusual eclipse timing variations. Of particular importance are low-mass eclipsing binaries, which are rare yet critical for resolving the ongoing mass-radius discrepancy between theoretical models and observations. To this end, we have discovered over a dozen new low-mass eclipsing binary candidates and spectroscopically confirmed the masses of five of them. One of these confirmed candidates, T-Lyr1-17236, is especially interesting because of its long orbital period. We examined T-Lyr1-17236 in detail and found that it is consistent with the magnetic disruption hypothesis. Both the source code of our pipeline and the complete list of our candidates are freely available.

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The period distribution of eclipsing and spectroscopic binary systems, II

Cited by 3 publications

References 2 publications

Solutions for 10,000 Eclipsing Binaries in the Bulge Fields of OGLE II Using DEBiL

Solutions for 10,000 Eclipsing Binaries in the Bulge Fields of OGLE II Using DEBiL

Eclipsing binary statistics – Theory and observation

On the Development and Applications of Automated Searches for Eclipsing Binary Stars

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