Excitation and evolution of transverse loop oscillations by coronal rain

Erwin Verwichte, Petra Kohutova, Patrick Antolin, George Rowlands, Thomas Neukirch

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


We present evidence of the excitation of vertically polarised transverse loop oscillations triggered by a catastrophic cooling of a coronal loop with two thirds of the loop mass comprising of cool rain mass. The nature and excitation of oscillations associated with coronal rain is not well understood. We consider observations of coronal rain using data from IRIS, SOT/Hinode and AIA/SDO in a bid to elucidate the excitation mechanism and evolution of wave characteristics. We apply an analytical model of wave-rain interaction, that predicts the inertial excitation amplitude of transverse loop oscillations as a function of the rain mass, to deduce the relative rain mass. It is consistent with the evolution of the oscillation period showing the loop losing a third of its mass due to falling coronal rain in a 10-15 minute time period.
Original languageEnglish
Title of host publicationProceedings of the International Astronomical Union
PublisherInternational Astronomical Union
Number of pages3
Publication statusPublished - 24 Jul 2018
EventIAU Symposium 335: Space Weather of the Heliosphere: Processes and Forecasts - University of Exeter, Exeter, United Kingdom
Duration: 17 Jul 201721 Jul 2017


ConferenceIAU Symposium 335: Space Weather of the Heliosphere
Abbreviated titleIAUS 335
Country/TerritoryUnited Kingdom
Internet address


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