Radiative Hydrodynamic Simulations of Solar and Stellar Flares

Details Radiative Hydrodynamic Simulations of Solar and Stellar Flares Radiative Hydrodynamic Simulations of Solar and Stellar Flares

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.0305a&link_type=abstract

American Astronomical Society Meeting 204, #03.05; Bulletin of the American Astronomical Society, Vol. 36, p.671

Astronomy and Astrophysics

Astronomy

Scientific paper

We have constructed radiative hydrodynamic simulations of the effects of flare heating on model solar and dMe stellar atmospheres. The heating is assumed to be driven by a beam of non-thermal electrons originating in the corona and impacting on the lower transition region and chromosphere. We use thick target bremsstrahlung fits to RHESSI hard X-ray observations of the July 23, 2002 and February 26, 2002 flares to model the electron beam. Our simulations include detailed calculations of numerous bound-bound and bound-free transitions which we compare with line profiles measured during flares on the Sun and on the dMe star AD Leo. We also investigate the possibility that the 511 keV emission line is produced from a significant amount of material at transition region temperatures.

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