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

TitleA Rotating Azimuthally Distributed Auroral Current System on Saturn Revealed by the Cassini Spacecraft
Authors
Issue Date2021
PublisherAmerican Astronomical Society. The Journal's web site is located at http://iopscience.iop.org/2041-8205
Citation
The Astrophysical Journal Letters, 2021, v. 919 n. 2, p. article no. L25 How to Cite?
AbstractStunning 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.
Persistent Identifierhttp://hdl.handle.net/10722/305323
ISSN
2023 Impact Factor: 8.8
2023 SCImago Journal Rankings: 2.766
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorGuo, RL-
dc.contributor.authorYao, ZH-
dc.contributor.authorDunn, WR-
dc.contributor.authorPalmaerts, B-
dc.contributor.authorSergis, N-
dc.contributor.authorGrodent, D-
dc.contributor.authorBadman, SV-
dc.contributor.authorYe, SY-
dc.contributor.authorPu, ZY-
dc.contributor.authorMitchell, DG-
dc.contributor.authorZhang, BZ-
dc.contributor.authorAchilleos, N-
dc.contributor.authorCoates, AJ-
dc.contributor.authorWei, Y-
dc.contributor.authorWaite, JH-
dc.contributor.authorKrupp, N-
dc.contributor.authorDougherty, MK-
dc.date.accessioned2021-10-20T10:07:48Z-
dc.date.available2021-10-20T10:07:48Z-
dc.date.issued2021-
dc.identifier.citationThe Astrophysical Journal Letters, 2021, v. 919 n. 2, p. article no. L25-
dc.identifier.issn2041-8205-
dc.identifier.urihttp://hdl.handle.net/10722/305323-
dc.description.abstractStunning 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.-
dc.languageeng-
dc.publisherAmerican Astronomical Society. The Journal's web site is located at http://iopscience.iop.org/2041-8205-
dc.relation.ispartofThe Astrophysical Journal Letters-
dc.titleA Rotating Azimuthally Distributed Auroral Current System on Saturn Revealed by the Cassini Spacecraft-
dc.typeArticle-
dc.identifier.emailZhang, BZ: binzh@hku.hk-
dc.identifier.authorityZhang, BZ=rp02366-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.3847/2041-8213/ac26b5-
dc.identifier.scopuseid_2-s2.0-85116480012-
dc.identifier.hkuros328281-
dc.identifier.volume919-
dc.identifier.issue2-
dc.identifier.spagearticle no. L25-
dc.identifier.epagearticle no. L25-
dc.identifier.eissn2041-8213-
dc.identifier.isiWOS:000702529400001-
dc.publisher.placeUnited Kingdom-

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