Fundamental parameters of 318 contact binaries from the TESS survey

Author:

Ding Xu1234,Ji KaiFan1234,Li XuZhi56ORCID,Xiong JianPing1234,Cheng QiYuan1234,Wang JinLiang1234

Affiliation:

1. Yunnan Observatories, Chinese Academy of Sciences (CAS) , P.O. Box 110, 650216 Kunming , P. R. China

2. Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences , P. O. Box 110, 650216 Kunming , P. R. China

3. Center for Astronomical Mega-Science, Chinese Academy of Sciences , 20A Datun Road, Chaoyang District, Beijing, 100012 , P. R. China

4. University of the Chinese Academy of Sciences , Yuquan Road 19#, Shijingshan Block, 100049 Beijing , P.R. China

5. Deep Space Exploration Laboratory / Department of Astronomy, University of Science and Technology of China , Hefei, 230026 , China

6. School of Astronomy and Space Science, University of Science and Technology of China , Hefei, Anhui 230026 , China

Abstract

ABSTRACT The TESS Survey has released a large number of high-precision light curves of contact binaries. However, using the Phoebe program and Markov chain Monte Carlo (MCMC) algorithm to obtain the posterior distribution of contact binary parameters is a time-consuming process. In order to obtain the contact binary parameters from the TESS survey, we build neural network (NN) models and combine them with the MCMC algorithm to obtain the contact binary parameters and parameter errors quickly. NN model is used in place of the physical model, which can generate a light curve with a precision of less than a millimagnitude. The NN model is capable of generating light curves at a speed that is four orders of magnitude faster than Phoebe running on the same computing platform. In this study, we have determined the parameters of 318 contact binary systems exhibiting relatively symmetric light curves. Subsequently, a statistical analysis was conducted on the derived parameters of these 318 targets. The coefficient of determination (R2) for 318 contact binaries between the light curves generated by Phoebe using these parameters obtained by the NN model and MCMC as inputs and the original light curves is greater than 0.99. Additionally, the distribution and correlation of the parameters for these 318 contact binary systems have been presented.

Funder

China Postdoctoral Science Foundation

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. TESS light-curve modelling and period study of four eclipsing binaries;Monthly Notices of the Royal Astronomical Society;2024-05-27

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