Home > Research > Publications & Outputs > A Rotating Azimuthally Distributed Auroral Curr...

Electronic data

  • Rotating multiple FACs system - ApJL - revised-Sep11

    Rights statement: This is an author-created, un-copyedited version of an article accepted for publication/published in The Astrophysical Journal Letters. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi: 10.3847/2041-8213/ac26b5

    Accepted author manuscript, 3.01 MB, PDF document

    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

Links

Text available via DOI:

View graph of relations

A Rotating Azimuthally Distributed Auroral Current System on Saturn Revealed by the Cassini Spacecraft

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Published
  • R. L. Guo
  • Z. H. Yao
  • W.R. Dunn
  • B. Palmaerts
  • N. Sergis
  • D. C. Grodent
  • Sarah Badman
  • S.-Y. Ye
  • Zu-Yin Pu
  • D. G. Mitchell
  • B. Z. Zhang
  • N Achilleos
  • A.J. Coates
  • Y. Wei
  • J.H. Waite
  • N. Krupp
  • M.K. Dougherty
Close
Article numberL25
<mark>Journal publication date</mark>1/10/2021
<mark>Journal</mark>Astrophysical Journal Letters
Issue number2
Volume919
Publication StatusPublished
<mark>Original language</mark>English

Abstract

Stunning aurorae are mainly produced when accelerated electrons travel along magnetic field lines to collide with the atmosphere. The motion of electrons often corresponds to the evolution of a magnetic field-aligned current system. In the terrestrial magnetosphere, the current system is formed at the night-side sector, and thus produces an auroral bulge at night. Due to the different energy sources between Saturn and the Earth, it is expected that their auroral current systems are fundamentally different, although the specific auroral driver at Saturn is poorly understood. Using simultaneous measurements of the aurora, particles, magnetic fields, and energetic neutral atoms, we reveal that a chain of paired currents, each of which includes a downward and an upward current branch, is formed in Saturn's magnetosphere, which generates separated auroral patches. These findings inform similar auroral current structures between the Earth and Saturn, while the difference is that Saturn's unique mass and energy sources lead to a rotational characteristic.

Bibliographic note

This is an author-created, un-copyedited version of an article accepted for publication/published in The Astrophysical Journal Letters. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi: 10.3847/2041-8213/ac26b5