English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In this paper, we study the temperature and density properties of multiplestructural components of coronal mass ejections (CMEs) using differentialemission measure (DEM) analysis. The DEM analysis is based on the six-passbandEUV observations of solar corona from the Atmospheric Imaging Assembly onboardthe \emph{Solar Dynamic Observatory}. The structural components studied includethe hot channel in the core region (presumably the magnetic flux rope of theCME), the bright loop-like leading front (LF), and coronal dimming in the wakeof the CME. We find that the presumed flux rope has the highest averagetemperature ($>$8 MK) and density ($\sim$1.0 $\times10^{9}$ cm$^{-3}$),resulting in an enhanced emission measure (EM) over a broad temperature range(3 $\leq$ T(MK) $\leq$ 20). On the other hand, the CME LF has a relatively cooltemperature ($\sim$2 MK) and a narrow temperature distribution similar to thepre-eruption coronal temperature (1 $\leq$ T(MK) $\leq$ 3). The density in theLF, however, is increased by 2% to 32% compared with that of the pre-eruptioncorona, depending on the event and location. In coronal dimmings, thetemperature is more broadly distributed (1 $\leq$ T(MK) $\leq$ 4), but thedensity decreases by $\sim$35% to $\sim$40%. These observational results showthat: (1) CME core regions are significantly heated, presumably throughmagnetic reconnection, (2) CME LFs are a consequence of compression of ambientplasma caused by the expansion of the CME core region, and (3) the dimmings arelargely caused by the plasma rarefaction associated with the eruption.

Differential Emission Measure Analysis of Multiple Structural Components of Coronal Mass Ejections in the Inner Corona