title: Solar wind thermally induced magnetic fluctuations.
abstract: A kinetic description of Alfvén-cyclotron magnetic fluctuations for anisotropic electron-proton quasistable plasmas is studied. An analytical treatment, based on the fluctuation-dissipation theorem, consistently shows that spontaneous fluctuations in plasmas with stable distributions significantly contribute to the observed magnetic fluctuations in the solar wind, as seen, for example, in [S. D. Bale et al., Phys. Rev. Lett. 103, 211101 (2009)], even far below from the instability thresholds. Furthermore, these results, which do not require any adjustable parameters or wave excitations, are consistent with the results provided by hybrid simulations. It is expected that this analysis contributes to our understanding of the nature of magnetic fluctuations in the solar wind.
authors.affiliation: Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile.
authors.forename: R E
authors.initials: RE
authors.lastname: Navarro
authors.affiliation: NASA Goddard Space Flight Center, Heliophysics Science Division, Geospace Physics Laboratory, Mail Code 673, Greenbelt, Maryland 20771, USA and Department of Physics, Catholic University of America, Washington, D.C. 20064, USA.
authors.forename: P S
authors.initials: PS
authors.lastname: Moya
authors.affiliation: Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile.
authors.forename: V
authors.initials: V
authors.lastname: Muñoz
authors.affiliation: Departamento de Física, Universidad de Concepción, Concepción 4070386, Chile.
authors.forename: J A
authors.initials: JA
authors.lastname: Araneda
authors.affiliation: NASA Goddard Space Flight Center, Heliophysics Science Division, Geospace Physics Laboratory, Mail Code 673, Greenbelt, Maryland 20771, USA.
authors.forename: A
authors.initials: A
authors.lastname: F-Viñas
authors.affiliation: Departamento de Física, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile and Centro de Estudios Interdisciplinarios Básicos y Aplicados en Complejidad, CEIBA complejidad, Bogotá, Colombia and Centro para el Desarrollo de la Nanociencia y la Nanotecnología, CEDENNA, Santiago, Chile.
authors.forename: J A
authors.initials: JA
authors.lastname: Valdivia