English

Transverse oscillations in a coronal loop triggered by a jet

Solar and Stellar Astrophysics 2016-12-07 v1

Abstract

We detect and analyse transverse oscillations in a coronal loop, lying at the south east limb of the Sun as seen from the \textit{{Atmospheric Imaging Assembly}} (AIA) onboard \textit{{Solar Dynamics Observatory}} (SDO). The jet is believed to trigger transverse oscillations in the coronal loop. The jet originates from a region close to the coronal loop on 19th^{\rm th} September 2014 at 02:01:35 UT. The length of the loop is estimated to be between 377-539~Mm. Only one complete oscillation is detected with an average period of about 32±532\pm5~min. Using MHD seismologic inversion techniques, we estimate the magnetic field inside the coronal loop to be between 2.684.52.68 -4.5~G. The velocity of the hot and cool components of the jet is estimated to be 168~km~s1^{-1} and 43~km~s1^{-1}, respectively. The energy density of the jet is found to be greater than the energy density of the oscillating coronal loop. Therefore, we conclude that the jet {triggered} transverse oscillations in the coronal loop. To our knowledge, this is the first coronal loop seismology study using the properties of a jet propagation {to trigger} oscillations.

Keywords

Cite

@article{arxiv.1611.04063,
  title  = {Transverse oscillations in a coronal loop triggered by a jet},
  author = {S. Sarkar and V. Pant and A. K. Srivastava and D. Banerjee},
  journal= {arXiv preprint arXiv:1611.04063},
  year   = {2016}
}

Comments

Accepted for publication in Solar Physics

R2 v1 2026-06-22T16:50:28.578Z