A Review of the 0.1 Reconnection Rate Problem
P. A. Cassak, Y.-H. Liu, M. A. Shay
TL;DR
This paper reviews the persistent 0.1 reconnection rate problem in magnetic reconnection, summarizing observational, numerical, and theoretical insights, and highlighting open questions in the field.
Contribution
It provides a comprehensive review of evidence and recent theories explaining the universal reconnection rate limit of 0.1.
Findings
Observational and numerical evidence supports the 0.1 rate limit.
Recent theoretical work offers explanations for this rate.
Open questions remain about the fundamental mechanisms.
Abstract
A long-standing problem in magnetic reconnection is to explain why it tends to proceed at or below a normalized rate of 0.1. This article gives a review of observational and numerical evidence for this rate and discusses recent theoretical work addressing this problem. Some remaining open questions are summarized.
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