5:15 PM - 7:15 PM
[PEM11-P03] Mass Contribution to Coronal Mass Ejections(CMEs) from Plasma Flow in Dimming Regions
Keywords:CME, Flare, Coronal Dimming
Coronal mass ejections (CMEs) associated with solar flares significantly impact the Sun-Earth environment. In particular, their mass loss is a crucial factor in understanding the early solar mass and the evolution of planetary atmospheres.It has been suggested that the mass ejected during a CME may not only originate from the CME core itself but also be supplied from the surrounding coronal regions. These surrounding coronal regions are observationally identified as dimming regions, where upward flows, lasting for several hours, have been observed in the EUV wavelength range. These flows, referred to as "dimming flows," are thought to continuously supply mass to the CME.
Jin et al. 2009 estimated the mass contribution of dimming flows using observations of the X1.5 flare on December 14, 2006, by Hinode/EIS. Their results suggested that the mass supplied by the dimming flow was approximately ten times the CME mass estimated from LASCO observations, raising the possibility that CME masses have been underestimated.
To address the potential underestimation of CME masses, this study aims to estimate the mass contribution of dimming flows during CMEs. Using the relationship between photospheric magnetic field strength and Fe XII Doppler velocities presented by Jin et al. 2009, we modeled the dimming flow and calculated its continuous mass supply using extreme ultraviolet (EUV) observations from SDO/AIA. In this presentation, we quantitatively discuss the underestimation issue by comparing the mass loss due to dimming flow with the CME mass estimated by K. Dissauer et al. (2018, 2019).
Jin et al. 2009 estimated the mass contribution of dimming flows using observations of the X1.5 flare on December 14, 2006, by Hinode/EIS. Their results suggested that the mass supplied by the dimming flow was approximately ten times the CME mass estimated from LASCO observations, raising the possibility that CME masses have been underestimated.
To address the potential underestimation of CME masses, this study aims to estimate the mass contribution of dimming flows during CMEs. Using the relationship between photospheric magnetic field strength and Fe XII Doppler velocities presented by Jin et al. 2009, we modeled the dimming flow and calculated its continuous mass supply using extreme ultraviolet (EUV) observations from SDO/AIA. In this presentation, we quantitatively discuss the underestimation issue by comparing the mass loss due to dimming flow with the CME mass estimated by K. Dissauer et al. (2018, 2019).