分类： 天文学 >> 天文学 提交时间： 2023-02-19
Matthew J. West
Daniel B. Seaton
David B. Wexler
John C. Raymond
Giulio Del Zanna
Yeimy J. Rivera
Adam R. Kobelski
Craig DeForest
Leon Golub
Amir Caspi
Chris R. Gilly
Jason E. Kooi
Benjamin L. Alterman
Nathalia Alzate
Dipankar Banerjee
David Berghmans
Bin Chen
Lakshmi Pradeep Chitta
Cooper Downs
Silvio Giordano
摘要： The middle corona, the region roughly spanning heliocentric altitudes from $1.5$ to $6\,R_\odot$, encompasses almost all of the influential physical transitions and processes that govern the behavior of coronal outflow into the heliosphere. Eruptions that could disrupt the near-Earth environment propagate through it. Importantly, it modulates inflow from above that can drive dynamic changes at lower heights in the inner corona. Consequently, this region is essential for comprehensively connecting the corona to the heliosphere and for developing corresponding global models. Nonetheless, because it is challenging to observe, the middle corona has been poorly studied by major solar remote sensing 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 it covers, and the underlying physics believed to be encapsulated by the region. This paper aims to define the middle corona and give an overview of the processes that occur there.
分类： 天文学 >> 天文学 提交时间： 2023-02-19
Donald M. Hassler
Sarah E Gibson
Jeffrey S Newmark
Nicholas A. Featherstone
Lisa Upton
Nicholeen M Viall
J Todd Hoeksema
Frederic Auchere
Aaron Birch
Doug Braun
Paul Charbonneau
Robin Colannino
Craig DeForest
Mausumi Dikpati
Cooper Downs
Nicole Duncan
Heather Alison Elliott
Yuhong Fan
Silvano Fineschi
Laurent Gizon
摘要： Solaris is a transformative Solar Polar Discovery-class mission concept to address crucial outstanding questions that can only be answered from a polar vantage. Solaris will image the Sun's poles from ~75 degree latitude, providing new insight into the workings of the solar dynamo and the solar cycle, which are at the foundation of our understanding of space weather and space climate. Solaris will also provide enabling observations for improved space weather research, modeling and prediction, revealing a unique, new view of the corona, coronal dynamics and CME eruptions from above.
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