Solar farside magnetograms from deep learning analysis of STEREO/EUVI data
Autor: | Il-Hyun Cho, Yong-Jae Moon, Soojeong Jang, Harim Lee, Myungjin Choi, Lok-Won Kim, Kyung-Suk Cho, Daye Lim, Eunsu Park, Taeyoung Kim, Sung-Ho Bae |
---|---|
Rok vydání: | 2019 |
Předmět: |
010504 meteorology & atmospheric sciences
Solar dynamics observatory business.industry Deep learning Astronomy and Astrophysics Space weather 01 natural sciences Extreme ultraviolet 0103 physical sciences Artificial intelligence Helioseismology business 010303 astronomy & astrophysics Geology 0105 earth and related environmental sciences Remote sensing |
Zdroj: | Nature Astronomy. 3:397-400 |
ISSN: | 2397-3366 |
Popis: | Solar magnetograms are important for studying solar activity and predicting space weather disturbances1. Farside magnetograms can be constructed from local helioseismology without any farside data2-4, but their quality is lower than that of typical frontside magnetograms. Here we generate farside solar magnetograms from STEREO/Extreme UltraViolet Imager (EUVI) 304-A images using a deep learning model based on conditional generative adversarial networks (cGANs). We train the model using pairs of Solar Dynamics Observatory (SDO)/Atmospheric Imaging Assembly (AIA) 304-A images and SDO/Helioseismic and Magnetic Imager (HMI) magnetograms taken from 2011 to 2017 except for September and October each year. We evaluate the model by comparing pairs of SDO/HMI magnetograms and cGAN-generated magnetograms in September and October. Our method successfully generates frontside solar magnetograms from SDO/AIA 304-A images and these are similar to those of the SDO/HMI, with Hale-patterned active regions being well replicated. Thus we can monitor the temporal evolution of magnetic fields from the farside to the frontside of the Sun using SDO/HMI and farside magnetograms generated by our model when farside extreme-ultraviolet data are available. This study presents an application of image-to-image translation based on cGANs to scientific data. Farside solar magnetograms are generated from STEREO images using deep learning, with Hale-patterned active regions being well reproduced. These images can be used to monitor the temporal evolution of magnetic fields from the farside to the frontside. |
Databáze: | OpenAIRE |
Externí odkaz: |