Catálogo de publicaciones - revistas

Compartir en
redes sociales

Título de Acceso Abierto

The Astrophysical Journal (ApJ)

Resumen/Descripción – provisto por la editorial en inglés

The Astrophysical Journal is an open access journal devoted to recent developments, discoveries, and theories in astronomy and astrophysics. Publications in ApJ constitute significant new research that is directly relevant to astrophysical applications, whether based on observational results or on theoretical insights or modeling.

Palabras clave – provistas por la editorial

astronomy; astrophysics

Disponibilidad

Institución detectada	Período	Navegá	Descargá	Solicitá
No detectada	desde jul. 1995 / hasta dic. 2023	IOPScience

Información

Tipo de recurso:

revistas

ISSN impreso

0004-637X

ISSN electrónico

1538-4357

Editor responsable

American Astronomical Society (AAS)

Idiomas de la publicación

inglés

País de edición

Reino Unido

Información sobre licencias CC

https://creativecommons.org/licenses/by/4.0/

Cobertura temática

Ciencias físicas

Tabla de contenidos

doi: 10.3847/1538-4357/ab17d3

Testing of the Taylor Frozen-in-flow Hypothesis at Electron Scales in the Solar Wind Turbulence

S. Y. Huang; F. Sahraoui

<jats:title>Abstract</jats:title> <jats:p>In single-spacecraft observations the Taylor frozen-in-flow hypothesis is usually used to infer wavenumber spectra of turbulence from the frequency ones. While this hypothesis can be valid at MHD scales in the solar wind because of the small phase speeds of the fluctuations in comparison with the solar wind flow speed, its validity at electron scales is questionable. In this paper, we use <jats:italic>Cluster</jats:italic> data to verify the validity of the Taylor hypothesis in solar wind turbulence using the test proposed in Sahraoui et al. based on the assumption that the spectral breaks occur at <jats:italic>ρ</jats:italic> <jats:sub>i</jats:sub> and <jats:italic>ρ</jats:italic> <jats:sub>e</jats:sub>. Using a model based on the dispersion relation of the linear whistler mode and the estimated ratios of the spectral breaks of the magnetic energy observed in the free-streaming solar wind, we find that 32% of the events would violate the Taylor hypothesis because of their high frequency (in the plasma rest frame) compared to the Doppler shift <jats:inline-formula> <jats:tex-math> <?CDATA ${\boldsymbol{k}}$?> </jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="apjab17d3ieqn1.gif" xlink:type="simple" /> </jats:inline-formula>·<jats:inline-formula> <jats:tex-math> <?CDATA ${\boldsymbol{V}}$?> </jats:tex-math> <jats:inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="apjab17d3ieqn2.gif" xlink:type="simple" /> </jats:inline-formula>(∣<jats:italic>ω</jats:italic> <jats:sub>plas</jats:sub>/<jats:italic>k</jats:italic>·<jats:italic>V</jats:italic> ∣ > 0.5). Furthermore, the model shows that those events would correspond to whistler modes with propagation angles <jats:italic>θ</jats:italic> <jats:sub>kB</jats:sub> ≤ 68°. The limitations of the method used and the implications of the results on future spacecraft measurements of electron-scale turbulence are discussed.</jats:p>

Palabras clave: Space and Planetary Science; Astronomy and Astrophysics.

Pp. 138