SIMBAD references

2017A&A...606A..92M - Astronomy and Astrophysics, volume 606A, 92-92 (2017/10-1)

Gaia eclipsing binary and multiple systems. Two-Gaussian models applied to OGLE-III eclipsing binary light curves in the Large Magellanic Cloud.

MOWLAVI N., LECOEUR-TAIBI I., HOLL B., RIMOLDINI L., BARBLAN F., PRSA A., KOCHOSKA A., SUVEGES M., EYER L., NIENARTOWICZ K., JEVARDAT G., CHARNAS J., GUY L. and AUDARD M.

Abstract (from CDS):

Context. The advent of large scale multi-epoch surveys raises the need for automated light curve (LC) processing. This is particularly true for eclipsing binaries (EBs), which form one of the most populated types of variable objects. The Gaia mission, launched at the end of 2013, is expected to detect of the order of few million EBs over a five-year mission.
Aims. We present an automated procedure to characterize EBs based on the geometric morphology of their LCs with two aims: first to study an ensemble of EBs on a statistical ground without the need to model the binary system, and second to enable the automated identification of EBs that display atypical LCs.
Methods. We modeled the folded LC geometry of EBs using up to two Gaussian functions for the eclipses and a cosine function for any ellipsoidal-like variability that may be present between the eclipses. The procedure is applied to the OGLE-III data set of EBs in the Large Magellanic Cloud (LMC) as a proof of concept. The Bayesian information criterion is used to select the best model among models containing various combinations of those components, as well as to estimate the significance of the components.
Results. Based on the two-Gaussian models, EBs with atypical LC geometries are successfully identified in two diagrams, using the Abbe values of the original and residual folded LCs, and the reduced χ2. Cleaning the data set from the atypical cases and further filtering out LCs that contain non-significant eclipse candidates, the ensemble of EBs can be studied on a statistical ground using the two-Gaussian model parameters. For illustrative purposes, we present the distribution of projected eccentricities as a function of orbital period for the OGLE-III set of EBs in the LMC, as well as the distribution of their primary versus secondary eclipse widths.

Abstract Copyright: © ESO, 2017

Journal keyword(s): binaries: eclipsing - Magellanic Clouds - methods: data analysis - catalogs - surveys - surveys

VizieR on-line data: <Available at CDS (J/A+A/606/A92): o3lmcebs.dat>

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 45

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2017A&A...606A..92M and select 'bookmark this link' or equivalent in the popup menu


2021.02.28-06:10:18

© Université de Strasbourg/CNRS

    • Contact