![]() Kai LI from Shandong University provided observational time and Dr. First near-IR spectrum was obtained on 31 st January 2020, when Betelgeuse was almost at the minimum of its brightness. Professor Gang ZHAO applied for the high-resolution observations at Weihai Observatory of Shandong University, where Weihai Echelle Spectrograph (WES) – the first fiber-fed echelle spectrograph for astronomical observation in China – allows to cover the range up to 11,000 Å ( Gao et al., 2016).Some of them are not well-understood and cannot be considered in theoretical models. Many physical processes are involved there, such as, huge convective flows, pulsations, magnetic field, material ejection, and dust condensation. We had many discussions about what a complex star Betelgeuse is. Professor Gang ZHAO suggested me to study the possible physical cause behind this phenomenon with our advantage of spectroscopic analysis.The rumors about imminent explosion of Betelgeuse started spreading in mass media. ![]()
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