Density of active region outflows derived from Fe XIV 264/274. Naomasa KITAGAWA & Takaaki YOKOYAMA The University of Tokyo, Japan. Discovery of AR outflows. In dark location v=50-150 km s -1 Persistent Emanated from ‘open’ region. Fe XII intensity. Doppler vel. Width. (Doschek 2008).
Naomasa KITAGAWA & Takaaki YOKOYAMA
The University of Tokyo, Japan
Fe XII intensity
= EBW + Main component
(Hara et al. 2008)
(Tian et al. 2011)
(De Pontieu et al. 2009)
(Brooks & Warren 2012)
i.e. not the photospheric
Asymmetries of the emission lines peak in the coronal temperature (around Fe XII).
cf. ) Density of outflow regions
Histogram for l274/l264
CHIANTI ver.7 (Dere et al. 1997, Landi et al. 2013)
Density map for each component
EBWs (outflows) are more tenuous than the main component.
(h* for two components were calculated separately.)
Although emission of AR outflows is weak, they dominate in terms of the volume.
Wavelength scale is adjusted.
It is confirmed that outflows are more tenuous than the dominant, rest component.
(1) noutflow < nMain
(2) h*outflow > h*Main
(3) Doppler velocities indicate blueshift for log T≥5.8.
Driving mechanism in somewhat steady manner is required.
Histogram for Ne