Intense Flare-CME Event of the Year 2015: Propagation and Interaction Effects between Sun and Earth's Orbit

Abstract

In this paper, We report the interplanetary effects of a fast coronal mass ejection (CME) associated with the intense X2.7 flare that occurred on 05 May 2015. The near-Sun signatures of the CME at low-coronal heights $<$2 {R${}_{\odot }$} are obtained from the EUV images at 171 Å and metric radio observations. The intensity and duration of the CME-driven radio bursts in the near-Sun and interplanetary medium indicate this CME event to be an energetic one. The interplanetary scintillation data, along with the low-frequency radio spectrum, played a crucial role in understanding the radial evolution of the speed and expansion of the CME in the inner heliosphere as well as its interaction with a preceding slow CME. The estimation of the speed of the CME at several points along the Sun to 1 AU shows shows that i) the CME went through a rapid acceleration as well as expansion up to a height of $\approx$6 {R${}_{\odot }$}, and ii) the CME continued to propagate at speed $\ge$800 kms${}^{-1}$ between the Sun and 1 AU. These results show that the CME likely overcame the drag exerted by the ambient/background solar-wind with the support of its internal magnetic energy. When the CME interacted with a slow preceding CME, the turbulence level associated with the CME-driven disturbance increased significantly.

arXiv comment16 pages, 11 figures, Accepted for publication in Solar Physics

References in corpus (6)

• The SWAP EUV Imaging Telescope Part I: Instrument Overview and Pre-Flight Testing
• Three-dimensional Evolution of Solar Wind during Solar Cycles 22-24
• The SWAP EUV Imaging Telescope. Part II: In-flight Performance and Calibration
• CME Propagation Characteristics from Radio Observations
• Coronal Mass Ejections - Propagation Time and Associated Internal Energy
• Interplanetary Consequences of a Large CME

Cited by in corpus (3)

• Development of a coronal mass ejection arrival time forecasting system using interplanetary scintillation observations
• Validation of Coronal Mass Ejection Arrival-Time Forecasts by Magnetohydrodynamic Simulations based on Interplanetary Scintillation Observations
• Limb Observations of Global Solar Coronal Extreme-ultraviolet Wavefronts: The Inclination, Kinematics, Coupling with the Expanding Coronal Mass Ejections, and Connection with the Coronal Mass Ejection Driven Shocks