Thejappa, G.Stone, R. G.Goldstein, Melvyn2023-11-072023-11-071996-03Thejappa, G., Stone, R.G. & Goldstein, M.L. Detection of langmuir solitons: implications for type III burst emission mechanisms at 2ωₚₑ . Astrophys Space Sci 243, 195–198 (1996). https://doi.org/10.1007/BF00644054https://doi.org/10.1007/BF00644054http://hdl.handle.net/11603/30576We present the experimental verification of existing theoretical models of emission mechanisms of solar type III bursts at the second harmonic of the plasma frequency, ω ₚₑ . This study is based on the detection of Langmuir and envelope solitons by the Ulysses spacecraft inside three type III burst source regions. We show that the oscillating-two-stream instability, coherent radiation by Langmuir solitons and stochastic phase mixing of the Langmuir waves in the strong turbulence regime are the appropriate emission mechanisms at 2ω ₚₑ .4 pagesen-USThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.Public Domain Mark 1.0http://creativecommons.org/publicdomain/mark/1.0/Text