I am working with Prof. Lyndsay Fletcher on solar flares. We are currently looking at the behaviour of the chromosphere during flares, with a particular focus on the hydrogen Lyman lines.
After using EVE observations to measure Doppler shifts in these lines, we found signatures of both plasma upflows and downflows. We are now using radiative hydrodynamic and radiative transfer codes, RADYN & RH, to produce simulated H Lyman profiles and understand their formation in the solar atmosphere. We have also bridged the gap between observations and simulations by performing synthetic observations of model line profiles obtained through flare simulations.
In 2016 I visited the NASA Goddard Space Flight Centre for 4 months to further this work, and presented our observations at the SDO Living With A Star conference in Burlington, VT. In 2017, I presented our findings from modelling at the Solar Physics Division conference in Portland, OR.
Doppler speeds of the hydrogen Lyman lines in solar flares from EVE – Astronomy & Astrophysics -11/2016 – Stephen Brown, Lyndsay Fletcher & Nicolas Labrosse
Hydrogen Balmer Line Broadening in Solar and Stellar Flares – Astrophysical Journal – 2017 – Adam F Kowalski, Joel C Allred, Han Uitenbroek, Pier-Emmanuel Tremblay, Stephen Brown, Mats Carlsson, Rachel A Osten, John P Wisniewski, Suzanne L Hawley
Modelling of the Hydrogen Lyman Lines in Solar Flares – Astrophysical Journal – 07/2018 – Stephen Brown, Lyndsay Fletcher, Graham Kerr, Nicolas Labrosse, Adam Kowalski & Jaime De La Cruz Rodríguez
School of Physics and Astronomy
University of Glasgow
Tel: +44 141 330 2960
Fax: +44 141 330 8600