ISSI International Team

Solar Chromospheric Flares

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Scientific Aims

The international team of experts in the theory and observation of solar chromospheric flares will focus on the question of energy deposition in solar flares. How can multi-wavelength, high spatial, spectral and temporal resolution observations of the flare chromosphere from spaceand ground-based observatories be interpreted in the context of detailed modeling of flare radiative transfer and hydrodynamics? With these tools we can pin down the depth in the chromosphere at which flare energy is deposited, its time evolution and the response of the chromosphere to this dramatic event. We will undertake a program of advanced numerical simulation and multi-wavelength data analysis, and study the diagnostic potential that these bring, with the possibilities offered by future instrumentation in also mind.

Team Members

Lyndsay Fletcher, University of Glasgow, UK (team leader)
Jana Kašparová, Astronomical Institute, Ondřejov, Czech Republic (team co-leader)
William Abbett, University of California, Berkeley, USA
Arkadiusz Berlicki, University of Wrocław, Poland / Astronomical Institute, Ondřejov, Czech Republic
Mats Carlsson, University of Oslo, Norway
Gianna Cauzzi, INAF, Firenze, Italy
Mingde Ding, Nanjing University, China
Suzanne Hawley, University of Washington, Seattle, USA
Petr Heinzel, Astronomical Institute, Ondřejov, Czech Republic
Hugh Hudson, University of California, Berkeley, USA
Ryan Milligan, NASA GSFC, Greenbelt, USA

Young Scientists
Adam Kowalski, University of Washington, Seattle, USA
Fatima Rubio da Costa, University of Catania, Italy / University of Glasgow, UK


First meeting 23 - 27 Nov 2009: at ISSI, Hallerstrasse 6, Seminar room, 1st floor, 9 a.m.
   Suggested schedule:

       Lyndsay - Overview of workshop goals
         Gianna - ground-based observations
         Arek - H alpha
         Lyndsay - hard X-rays/gamma-rays
         Ryan - chromospheric evaporation
         Mingde - white light
         Hugh - spectral distributions of chromospheric flares
         Suzanne and Adam - stellar flares
         Bill - Radiative HD modeling I (Abbett/Hawley/Carlsson/Allred work)
         Petr - Radiative HD modeling II (Heinzel/Kašparová/Karlický/Varady work)
         Fatima - Lyman alpha modeling


Berlicki, A., Gunar, S., Heinzel, P., Schmieder, B., Schwartz, P., 2D radiative-magnetohydrostatic model of a prominence observed by Hinode, SOHO/SUMER and Meudon/MDSP, 2011, Astron. Astrophys. 530, 143

Fletcher, L., Turkmani, R., Hudson, H. S., Hawley, S. L., Kowalski, A., Berlicki, A., Heinzel, P.: Solar Flares and the Chromosphere, 2010, A submission to NASA's Decadal Survey, 2010arXiv1011.4650F

Fletcher, L., Hudson, H., Cauzzi, G., Getman, K. V., Giampapa, M., Hawley, S. L., Heinzel, P., Johnstone, C., Kowalski, A. F., Osten, R. A., Pye, J., 201, Splinter Session "Solar and Stellar Flares", Proceedings of the 16th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun, ASP 448, 441

Heinzel, P., Avrett, E. H., Optical-to-Radio Continua in Solar Flares, 2012, Sol. Phys. 277, 31

Hudson, H.S., Fletcher, L., MacKinnon, A.L., Woods, T.N., Charge-exchange limits on low-energy alpha-particle fluxes in solar flares, 2012, Solar Physics (in press)

Milligan, R. O., Spatially resolved nonthermal line broadening during the impulsive phase of a solar flare, 2011, ApJ 740, 70

Milligan, R.O., Chamberlin, P.C., Hudson, H.S., Woods, T.N., Mathioudakis, M., Fletcher, L., Kowalski, A.F., Keenan, F.P., Observations of enhanced EUV continua during an X-class solar flare using SDO/EVE, Astrophysical Journal Letters, 2012, ApJ 748, L14

Rubio da Costa, F., Zuccarello, F., Fletcher, L., Labrosse, N., Prosecky, T., Kasparova, J., Solar flares in H-alpha and Ly-alpha: observations vs simulations, 2012, Mem. S. A. It. Suppl. VOl. 19, 117

Last update on 29th Feb 2012 by Jana Kašparová (kasparov (at)