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Defining the Middle Corona.

Published version
Peer-reviewed

Repository DOI


Change log

Abstract

The middle corona, the region roughly spanning heliocentric distances from 1.5 to 6 solar radii, encompasses almost all of the influential physical transitions and processes that govern the behavior of coronal outflow into the heliosphere. The solar wind, eruptions, and flows pass through the region, and they are shaped by it. Importantly, the region also modulates inflow from above that can drive dynamic changes at lower heights in the inner corona. Consequently, the middle corona is essential for comprehensively connecting the corona to the heliosphere and for developing corresponding global models. Nonetheless, because it is challenging to observe, the region has been poorly studied by both major solar remote-sensing and in-situ missions and instruments, extending back to the Solar and Heliospheric Observatory (SOHO) era. Thanks to recent advances in instrumentation, observational processing techniques, and a realization of the importance of the region, interest in the middle corona has increased. Although the region cannot be intrinsically separated from other regions of the solar atmosphere, there has emerged a need to define the region in terms of its location and extension in the solar atmosphere, its composition, the physical transitions that it covers, and the underlying physics believed to shape the region. This article aims to define the middle corona, its physical characteristics, and give an overview of the processes that occur there.

Description

Funder: Future Faculty Leaders postdoctoral fellowship at Harvard University


Funder: 6.1 Base funding for basic research at the US Naval Research Laboratory


Funder: NASA/GSFC Internal Scientist Funding Model competitive work package program - Connecting the corona to solar wind structure and magnetospheric impact using modeling and remote and in-situ observations

Keywords

Corona

Journal Title

Sol Phys

Conference Name

Journal ISSN

0038-0938
1573-093X

Volume Title

298

Publisher

Springer Science and Business Media LLC
Sponsorship
STFC (ST/T000481/1)