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One-dimensional Convolutional Neural Networks for Detecting Transiting Exoplanets

By Keith Cowing
Status Report
December 12, 2023
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One-dimensional Convolutional Neural Networks for Detecting Transiting Exoplanets
Graphic model of our CNN. In yellow, the input data shape; in blue, convolutional layers; in salmon, dense layers; in green, the output of the neural network. The lines between the layers indicate the activation function, the Dropout, and the Flatten layer, when appropriate. — astro-ph.EP

The transit method is one of the most relevant exoplanet detection techniques, which consists of detecting periodic eclipses in the light curves of stars.

This is not always easy due to the presence of noise in the light curves, which is induced, for example, by the response of a telescope to stellar flux. For this reason, we aimed to develop an artificial neural network model that is able to detect these transits in light curves obtained from different telescopes and surveys.

We created artificial light curves with and without transits to try to mimic those expected for the extended mission of the Kepler telescope (K2) in order to train and validate a 1D convolutional neural network model, which was later tested, obtaining an accuracy of 99.02 % and an estimated error (loss function) of 0.03. These results, among others, helped to confirm that the 1D CNN is a good choice for working with non-phased-folded Mandel and Agol light curves with transits.

It also reduces the number of light curves that have to be visually inspected to decide if they present transit-like signals and decreases the time needed for analyzing each (with respect to traditional analysis).

Santiago Iglesias Álvarez, Enrique Díez Alonso, María Luisa Sánchez, Javier Rodríguez Rodríguez, Fernando Sánchez Lasheras, Francisco Javier de Cos Juez

Subjects: Earth and Planetary Astrophysics (astro-ph.EP); Instrumentation and Methods for Astrophysics (astro-ph.IM); Machine Learning (cs.LG)
Cite as: arXiv:2312.07161 [astro-ph.EP] (or arXiv:2312.07161v1 [astro-ph.EP] for this version)
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Submission history
From: Santiago Iglesias
[v1] Tue, 12 Dec 2023 10:56:27 UTC (4,001 KB)

Astrobiology, Astronomy,

Explorers Club Fellow, ex-NASA Space Station Payload manager/space biologist, Away Teams, Journalist, Lapsed climber, Synaesthete, Na’Vi-Jedi-Freman-Buddhist-mix, ASL, Devon Island and Everest Base Camp veteran, (he/him) 🖖🏻