Fast Derivation of Contact Binary Parameters for Large Photometric Surveys

Author:

Ding XuORCID,Ji KaiFan,Li XuZhi,Xiong JianPing,Cheng QiYuan,Wang JinLiang,Liu Hui

Abstract

Abstract Thanks to an enormous release of light curves of contact binaries, it is a challenge to derive the parameters of contact binaries using the Phoebe program and the Wilson–Devinney program with the Markov chain Monte Carlo (MCMC) algorithm. In this paper, we use neural network (NN) and MCMC algorithm to derive the parameters of contact binaries. The fitting of models is still done with the MCMC algorithm, but that the neural network is used to establish the mapping relationship between the parameters and the light curves generated beforehand by Phoebe. The NN model is trained with a set of Phoebe-generated light curves with known input parameters, and then combined with the MCMC algorithm to quickly obtain the posterior distribution of the parameters. Two NN models without and with the influence of third light are established, which can generate light curves with 100 points faster than Phoebe by about four orders of magnitude under the same running condition. In addition, the two models can generate the light curves with an error of less than a millimagnitude. The feasibility of NN and MCMC algorithm is also verified by the synthetic light curves generated by Phoebe and the light curves from Kepler survey data. NN and MCMC algorithms can quickly derive the parameters and the corresponding parameter errors of contact binaries from sky survey. These parameters can also be used as more precise initial input values for the objectives of individual detailed studies.

Funder

Chinese Natural Science Foundation

China Manned Space Project

China Postdoctoral Science Foundation

Publisher

American Astronomical Society

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 6 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. A Method of Rapidly Deriving Late-type Contact Binary Parameters and Its Application in the Catalina Sky Survey;The Astrophysical Journal Supplement Series;2024-07-31

2. Detection of Contact Binary Candidates Observed By TESS Using the Autoencoder Neural Network;The Astronomical Journal;2024-04-04

3. Physical Parameters of 11,100 Short-period ASAS-SN Eclipsing Contact Binaries;The Astrophysical Journal Supplement Series;2024-03-01

4. The Distribution of Semidetached Binaries. I. An Efficient Pipeline;The Astrophysical Journal Supplement Series;2024-01-18

5. Binary stars in the new millennium;Progress in Particle and Nuclear Physics;2024-01

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