Exploring Flaring Behaviour on Low Mass Stars, Solar-type Stars and the Sun

L. Doyle, G. Ramsay, J. G. Doyle, P. F. Wyper, E. Scullion, K. Wu, J. A. McLaughlin

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Abstract

We report on our project to study the activity in both the Sun and low mass stars. Utilising high cadence, Hα observations of a filament eruption made using the CRISP spectropolarimeter mounted on the Swedish Solar Telescope has allowed us to determine 3D velocity maps of the event. To gain insight into the physical mechanism which drives the event we have qualitatively compared our observation to a 3D MHD reconnection model. Solar-type and low mass stars can be highly active producing flares with energies exceeding 1033 erg. Using K2 and TESS data we find no correlation between the number of flares and the rotation phase which is surprising. Our solar flare model can be used to aid our understanding of the origin of flares in other stars. By scaling up our solar model to replicate observed stellar flare energies, we investigate the conditions needed for such high energy flares.

Original languageEnglish
Pages (from-to)384-391
Number of pages8
JournalProceedings of the International Astronomical Union
Volume15
Issue numberS354
DOIs
Publication statusPublished - 24 Sept 2020
Event354th Symposium of the International Astronomical Union on Solar and Stellar Magnetic Fields: Origins and Manifestations - Copiapo, Chile
Duration: 30 Jun 20196 Jul 2019

Keywords

  • stars: flare
  • stars: low-mass
  • Sun: chromosphere
  • Sun: flares

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