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Kinetic Verification of the Stochastic Ion Heating Mechanism in Collisionless Magnetic Reconnection

Yoon, Young Dae and Bellan, Paul M. (2019) Kinetic Verification of the Stochastic Ion Heating Mechanism in Collisionless Magnetic Reconnection. Astrophysical Journal Letters, 887 (2). Art. No. L29. ISSN 2041-8205. http://resolver.caltech.edu/CaltechAUTHORS:20200110-141719618

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Abstract

The origin of anomalous, non-classical ion heating during magnetic reconnection has been a longstanding problem. It is verified via fully kinetic analyses and particle-in-cell simulations that stochastic heating is the main ion heating mechanism in collisionless magnetic reconnection up to moderate guide fields. Strong in-plane Hall electric fields that form during reconnection render ion motions chaotic and de facto broaden the ion distribution function. The mechanism is consistent with numerous observed features of ion heating in reconnection, such as the preferential heating of ions with higher mass-to-charge ratios and the non-conservation of the ion magnetic moment.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.3847/2041-8213/ab5b0aDOIArticle
ORCID:
AuthorORCID
Yoon, Young Dae0000-0001-8394-2076
Bellan, Paul M.0000-0002-0886-8782
Additional Information:© 2019. The American Astronomical Society. Received 2019 November 6; accepted 2019 November 25; published 2019 December 17. This material is based upon work supported by the NSF Solar Terrestrial Research Program via award grant 1914599 and by the Air Force Office of Scientific Research Space Science Program via award grant FA9550-17-1-0023. The computations presented here were conducted on the Caltech High Performance Cluster partially supported by a grant from the Gordon and Betty Moore Foundation.
Funders:
Funding AgencyGrant Number
NSFAGS-1914599
Air Force Office of Scientific Research (AFOSR)FA9550-17-1-0023
Gordon and Betty Moore FoundationUNSPECIFIED
Subject Keywords:Solar magnetic reconnection ; Planetary magnetosphere ; Solar coronal heating
Issue or Number:2
Classification Code:Unified Astronomy Thesaurus concepts: Solar magnetic reconnection (1504); Planetary magnetosphere (997); Solar coronal heating (1989)
Record Number:CaltechAUTHORS:20200110-141719618
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20200110-141719618
Official Citation:Young Dae Yoon and Paul M. Bellan 2019 ApJL 887 L29
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100633
Collection:CaltechAUTHORS
Deposited By: Young Dae Yoon
Deposited On:11 Jan 2020 00:39
Last Modified:12 Jan 2020 15:40

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