Line-of-sight velocity as a tracer of coronal cavity magnetic structure

AMS Citation:
Bak-Steslicka, U., S. Gibson, and E. Chmielewska, 2016: Line-of-sight velocity as a tracer of coronal cavity magnetic structure. Frontiers in Astronomy and Space Sciences, 3, 7, doi:10.3389/fspas.2016.00007.
Date:2016-03-16
Resource Type:article
Title:Line-of-sight velocity as a tracer of coronal cavity magnetic structure
Abstract: We present a statistical analysis of 66 days of observations of quiescent (non-erupting) coronal cavities and associated velocity and thermal structures. We find that nested rings of LOS-oriented velocity are common in occurrence and spatially well correlated with cavities observed in emission. We find that the majority of cavities possess multiple rings, and a range in velocity on the order of several km∕sec. We find that the tops of prominences lie systematically below the cavity center and location of largest Doppler velocity. Finally, we use DEM analysis to consider the temperature structure of two cavities in relation to cavity, prominence, and flows. These observations yield new constraints on the magnetic structure of cavities, and on the conditions leading up to solar eruptions.
Peer Review:Refereed
Copyright Information:Copyright Author(s) 2016. This work is distributed under the Creative Commons Attribution 3.0 License
OpenSky citable URL: ark:/85065/d7wm1g11
Publisher's Version: 10.3389/fspas.2016.00007
Author(s):
  • Urszula Bak-Steslicka
  • Sarah Gibson - NCAR/UCAR
  • Ewa Chmielewska
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