Poster Open Access

SEARCH: SEgmentation of polAR Coronal Holes

Ajay Kumar Tiwari; Benoit Tremblay; Andong Hu; Linnea M. Wolniewicz; Michael Kirk; Silvina Guidoni; Brent Smith; Matthew Penn; Tanmoy Samanta

The identification of solar coronal holes (CHs) observed in Extreme Ultraviolet (EUV) intensity images of the Sun is key in improving our understanding of their association with solar magnetic fields and heliophysics. In particular, CHs at the poles of the Sun are a notorious source of fast solar wind and thus warrant further study, most notably in the context of space-weather forecasting. This has consequently led to the development of various segmentation methods for their identification, including supervised machine learning. We introduce the SEARCH project to combine EUV data from the three vantage points (e.g., STEREO-A, STEREO-B, and SoHO) during the 2010-2014 epoch to produce synchronic maps and apply unsupervised learning methods including clustering and convolutional neural networks for the segmentation of CHs. SEARCH segmentation maps provide a venue to explore the relationship between CH pole areas, geomagnetic activity, and the magnetic activity cycle (dynamo process) of the Sun and Sun-like stars. Finally, in addition to CHs, the unsupervised learning methods we tested identified features consistent with active regions.

Join us over Zoom to discuss the poster: Time: Mar 3, 2021 10:00-11:00 AM Eastern Time (US and Canada) Meeting ID: 945 3391 7426 Time: Mar 4, 2021 11:00-12:00 AM Eastern Time (US and Canada) Meeting ID: 972 1289 7487
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  • SEARCH: SEgmentation of polaR Coronal Holes, NeurIPS 2020: Third Workshop on Machine Learning and the Physical Sciences

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