تقرير
Classifying Kepler light curves for 12,000 A and F stars using supervised feature-based machine learning
| العنوان: | Classifying Kepler light curves for 12,000 A and F stars using supervised feature-based machine learning |
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| المؤلفون: | Barbara, Nicholas H., Bedding, Timothy R., Fulcher, Ben D., Murphy, Simon J., Van Reeth, Timothy |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics |
| الوصف: | With the availability of large-scale surveys like Kepler and TESS, there is a pressing need for automated methods to classify light curves according to known classes of variable stars. We introduce a new algorithm for classifying light curves that compares 7000 time-series features to find those which most effectively classify a given set of light curves. We apply our method to Kepler light curves for stars with effective temperatures in the range 6500--10,000K. We show that the sample can be meaningfully represented in an interpretable five-dimensional feature space that separates seven major classes of light curves (delta Scuti stars, gamma Doradus stars, RR Lyrae stars, rotational variables, contact eclipsing binaries, detached eclipsing binaries, and non-variables). We achieve a balanced classification accuracy of 82% on an independent test set of Kepler stars using a Gaussian mixture model classifier. We use our method to classify 12,000 Kepler light curves from Quarter 9 and provide a catalogue of the results. We further outline a confidence heuristic based on probability density with which to search our catalogue, and extract candidate lists of correctly-classified variable stars. Comment: published by MNRAS |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/stac1515 |
| URL الوصول: | http://arxiv.org/abs/2205.03020 |
| رقم الأكسشن: | edsarx.2205.03020 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/stac1515 |
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