Media type: E-Article Title: Coexistence of Antisunward and Sunward Ion Cyclotron Waves in the Near-Sun Solar Wind: Excitation by the Proton Cyclotron Instability Contributor: Chen Shi; Jinsong Zhao; Si Liu; Fuliang Xiao; Yifan Wu; Trevor A. Bowen; Roberto Livi; S. D. Bale Published: 2024 Published in: The Astrophysical Journal Letters, 971 (2024) 2 Language: English DOI: 10.3847/2041-8213/ad68fb ISSN: 2041-8205 Origination: Footnote: Access State: Open Access