Radio burst from a stellar coronal mass ejection

• 成果类型: Article
• 署名作者: Callingham, J. R.; Tasse, C.; Keers, R.; Kavanagh, R. D.; Vedantham, H. K.; Zarka, P.; Bellotti, S.; Cristofari, P. I.; Bloot, S.; Konijn, D. C.; Hardcastle, M. J.; Lamy, L.; Pass, E. K.; Pope, B. J. S.; Reid, H.; Rottgering, H. J. A.; Shimwell, T. W.; Zucca, P.
• 署名单位: University of Amsterdam; Centre National de la Recherche Scientifique (CNRS); Universite PSL; Observatoire de Paris; Rhodes University; Centre National de la Recherche Scientifique (CNRS); Universite PSL; Universite de Orleans; Observatoire de Paris; Max Planck Society; Braunschweig University of Technology; University of Groningen; Kapteyn Astronomical Institute; Centre National de la Recherche Scientifique (CNRS); Universite PSL; Sorbonne Universite; Universite Paris Cite; Leiden University; Leiden University - Excl LUMC; Centre National de la Recherche Scientifique (CNRS); Communaute d'universites et etablissements de Toulouse (Comue); Universite de Toulouse (EPE); Smithsonian Institution; University of Hertfordshire; Centre National d'Etudes Spatiales (CNES); Centre National de la Recherche Scientifique (CNRS); Aix-Marseille Universite; Massachusetts Institute of Technology (MIT); Macquarie University; University of London; University College London
• 刊物名称: NATURE
• ISSN/ISSBN: 0028-0836; 1476-4687
• DOI: 10.1038/s41586-025-09715-3
• 发表日期: 2025-11-20
• 页码: 410462
• 关键词: FLARE; plasma; polarization; exoplanets; emission; lofar; stars

摘要

Coronal mass ejections (CMEs) are massive expulsions of magnetized plasma from a star and are the largest contributors to space weather in the Solar System1,2. CMEs play an important role in planetary atmospheric erosion, especially for planets that are close to their host star3, 4-5. However, this conclusion remains controversial as there has not been an unambiguous detection of a CME from a star outside our Sun. Previous stellar CME studies have only inferred the presence of a CME through the detection of other types of stellar eruptive event6, 7, 8-9. A signature of a fast CME is a type II radio burst10,11, which is emitted from the shock wave produced as the CME travels through the stellar corona into interplanetary space. Here we report an analogue to a type II burst from the early M dwarf StKM 1-1262. The burst exhibits identical frequency, time and polarization properties to fundamental plasma emission from a solar type II burst. We demonstrate that the rate of these events with similar radio luminosity from M dwarfs is 0.84-0.69+1.94x10-3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$0.8{4}_{-0.69}<^>{+1.94}\times 1{0}<^>{-3}$$\end{document} per day per star. Our detection implies that we are no longer restricted to extrapolating the solar CME kinematics and rates to other stars, allowing us to establish observational limits on the impact of CMEs on exoplanets.