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

Published online by Cambridge University Press:  24 September 2020

L. Doyle Open the ORCID record for L. Doyle [Opens in a new window] ,
G. Ramsay ,
J. G. Doyle ,
P. F. Wyper ,
E. Scullion ,
K. Wu  and
J. A. McLaughlin
L. Doyle
Affiliation:
Armagh Observatory, College Hill, Armagh, BT61 9DG, UK Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK
G. Ramsay
Affiliation:
Armagh Observatory, College Hill, Armagh, BT61 9DG, UK
J. G. Doyle
Affiliation:
Armagh Observatory, College Hill, Armagh, BT61 9DG, UK
P. F. Wyper
Affiliation:
Department of Mathematical Sciences, Durham University, Durham, DH1 3LE, UK
E. Scullion
Affiliation:
Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK
K. Wu
Affiliation:
Mullard Space Science Laboratory, University College London, Holmbury St Mary, Surrey RH5 6NT
J. A. McLaughlin
Affiliation:
Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK
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Abstract

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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 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.

Keywords

Sun: chromosphereSun: flaresstars: low-massstars: flare
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S354: Solar and Stellar Magnetic Fields: Origins and Manifestations , June 2019 , pp. 384 - 391
Copyright
© International Astronomical Union 2020

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