TY - JOUR
T1 - A Statistical Study of Propagating MHD Kink Waves in the Quiescent Corona
AU - Tiwari, Ajay
AU - Morton, Richard
AU - McLaughlin, James
N1 - Funding information: A.K.T. is supported by the European Union’s Horizon 2020 research and innovation program under grant agreement No. 824064 (ESCAPE10). R.J.M. is supported by a UKRI Future Leader Fellowship (RiPSAW—MR/ T019891/1). J.A.M. is supported by the Science and Technology Facilities Council (STFC) via grant No. ST/ T000384/1. The authors acknowledge the work of the National Center for Atmospheric Research/High Altitude Observatory CoMP instrument team. The authors also acknowledge STFC via grant No. ST/L006243/1 and for IDL support.
PY - 2021/10/1
Y1 - 2021/10/1
N2 - The Coronal Multi-channel Polarimeter (CoMP) has opened up exciting opportunities to probe transverse MHD waves in the Sun’s corona. The archive of CoMP data is utilized to generate a catalog of quiescent coronal loops that can be used for studying propagating kink waves. The catalog contains 120 loops observed between 2012 and 2014. This catalog is further used to undertake a statistical study of propagating kink waves in the quiet regions of the solar corona, investigating phase speeds, loop lengths, footpoint power ratio (a measure of wave power entering the corona through each footpoint of a loop) and equilibrium parameter (which provides a measure of the change in wave amplitude) values. The statistical study enables us to establish the presence of a relationship between the rate of damping and the length of the coronal loop, with longer coronal loops displaying weaker wave damping. We suggest the reason for this behavior is related to a decreasing average density contrast between the loop and ambient plasma as loop length increases. The catalog presented here will provide the community with the foundation for the further study of propagating kink waves in the quiet solar corona.
AB - The Coronal Multi-channel Polarimeter (CoMP) has opened up exciting opportunities to probe transverse MHD waves in the Sun’s corona. The archive of CoMP data is utilized to generate a catalog of quiescent coronal loops that can be used for studying propagating kink waves. The catalog contains 120 loops observed between 2012 and 2014. This catalog is further used to undertake a statistical study of propagating kink waves in the quiet regions of the solar corona, investigating phase speeds, loop lengths, footpoint power ratio (a measure of wave power entering the corona through each footpoint of a loop) and equilibrium parameter (which provides a measure of the change in wave amplitude) values. The statistical study enables us to establish the presence of a relationship between the rate of damping and the length of the coronal loop, with longer coronal loops displaying weaker wave damping. We suggest the reason for this behavior is related to a decreasing average density contrast between the loop and ambient plasma as loop length increases. The catalog presented here will provide the community with the foundation for the further study of propagating kink waves in the quiet solar corona.
UR - https://www.scopus.com/pages/publications/85116921140
U2 - 10.3847/1538-4357/ac10c4
DO - 10.3847/1538-4357/ac10c4
M3 - Article
SN - 0004-637X
VL - 919
SP - 1
EP - 10
JO - The Astrophysical Journal
JF - The Astrophysical Journal
IS - 2
M1 - 74
ER -