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Detection of period variations of eclipsing binaries in the Catalina Sky Survey

Papageorgiou, Athanasios and Catelan, Márcio and Christopoulou, Panagiota-Eleftheria and Drake, Andrew J. and Djorgovski, S. G. (2021) Detection of period variations of eclipsing binaries in the Catalina Sky Survey. Monthly Notices of the Royal Astronomical Society, 503 (2). pp. 2979-2999. ISSN 0035-8711. doi:10.1093/mnras/stab646.

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We present 126 eclipsing binary candidates among 4683 Catalina Sky Surveys (CSS) detached and semi-detached eclipsing binary systems (EBs) showing cyclic or quadratic period variations over a 12 yr time span. By using inverse Gaussian profiles of the eclipses coupled with a Markov chain Monte Carlo procedure, times of minima (ToM) were calculated and diagrams with eclipse timing variations (ETVs) were constructed. Numerical tests were performed, involving synthetic EBs with period variations generated by the PHOEBE 2.0 engine and actual data for EBs with well-known period variations from the literature, to verify that the calculation of ToM variations for our CSS systems is reliable. A total of 63 out of the 126 EBs show likely cyclic ETVs, while the remainder present quadratic behaviour instead. Periods, amplitudes, period change rates, and associated errors were determined by using sinusoidal and parabolic models. 12 out of the 63 EBs (19 per cent) that appear to exhibit periodic ETVs are low-mass candidates. Additionally, four out of 126 also have maximum quadrature light variations. The possibility that the cyclic variations are caused by the light traveltime effect due to the presence of a tertiary companion is investigated. The possible nature of the quadratic ETVs is also discussed.

Item Type:Article
Related URLs:
URLURL TypeDescription
Papageorgiou, Athanasios0000-0002-3039-9257
Catelan, Márcio0000-0001-6003-8877
Djorgovski, S. G.0000-0002-0603-3087
Additional Information:© 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model ( Accepted 2021 February 27. Received 2021 February 26; in original form 2020 July 30. Published: 09 March 2021. AP and MC gratefully acknowledge the support provided by FONDECYT through grants #3160782 and #1171273. Additional support for this project is provided by the Ministry for the Economy, Development, and Tourism’s Millennium Science Initiative through grant IC 120009, awarded to the Millennium Institute of Astrophysics (MAS); and by Proyecto Basal AFB-170002. We would like to thank the anonymous reviewer for the suggestions that helped to improve the paper. This work made use of data products from the CSS survey. The CSS survey is funded by the National Aeronautics and Space Administration under Grant No. NNG05GF22G issued through the Science Mission Directorate Near-Earth Objects Observations Program. The CRTS survey is supported by the US National Science Foundation under grants AST-0909182, AST-1313422, AST-1413600, and AST-1518308. Data Availability: The data underlying this article are available in the article and in its online supplementary material.
Group:Astronomy Department
Funding AgencyGrant Number
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)3160782
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)1171273
Iniciativa Científica Milenio del Ministerio de Economía, Fomento y TurismoIC 120009
Subject Keywords:methods: data analysis – surveys – (stars:) binaries (including multiple): close – (stars:) binaries: eclipsing
Issue or Number:2
Record Number:CaltechAUTHORS:20210602-083054714
Persistent URL:
Official Citation:Athanasios Papageorgiou, Márcio Catelan, Panagiota-Eleftheria Christopoulou, Andrew J Drake, S G Djorgovski, Detection of period variations of eclipsing binaries in the Catalina Sky Survey, Monthly Notices of the Royal Astronomical Society, Volume 503, Issue 2, May 2021, Pages 2979–2999,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109335
Deposited By: Tony Diaz
Deposited On:02 Jun 2021 17:32
Last Modified:02 Jun 2021 17:32

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