[P-EM14] Frontiers in solar physics

[PEM14-10] Universal Correlation between the Ejected Mass and Total Flare Energy for Solar and Stellar Cold Plasma Ejection

*Yuji Kotani^1,2, Kazunari Shibata³, Takako Ishi², Daiki Yamasaki^1,2, Kenichi Otsuji⁴, Kiyoshi Ichimoto², Ayumi Asai² (1.Department of Astronomy, Kyoto University, 2.Astronomical Observatory, Kyoto University, 3.Department of Environmental Systems Science, Faculty of Science and Engineering, Doshisha University, 4.National Institute of Information and Communications Technology)

Keywords:solar flare, filament eruption

We often find spectral signatures of chromospheric plasma ejections accompanied by flares in various spatial scales in the solar and stellar atmospheres. Similar spectral signatures are found regardless of their wide range of scale. However, no physical quantities such as mass and energy have been estimated for flare energies covering over 10 orders of magnitude until now. In this study, we analyzed the spectra of cold plasma ejections associated with flares by performing Hα imaging spectroscopy of the solar full-disk with SMART/SDDI. We determined the ejected mass by cloud model fitting to the Hα spectrum. We estimated flare energy by DEM analysis using SDO/AIA for small-scale flares and by estimating the bolometric energy for large-scale flares. In addition, we constructed a scaling law for the total flare energy and the ejected mass and compared it with our observation. The results are in good agreement with the scaling law for small mass ejections with small flares in the quiet region for a coronal field strength of 5 G and filament eruptions with flares for that of 5 − 50 G. We also compared it with the observations interpreted as stellar filament eruptions, and found that they were roughly consistent with the scaling law. These results suggest that cold plasma ejections with flares taking place on the sun and stars in a wide range of the energy scale are caused by a common mechanism.