2010/04/28 by P. Bryans, Paul Bryans, Peter R. Young +3 · 5 citations
Earth and Planetary Sciences · Physics and Astronomy · #Atmospheric Ozone and Climate #Ionosphere and magnetosphere dynamics #Solar and Space Plasma Dynamics #astro-ph.SR
paper · pdf · doi:10.1088/0004-637x/715/2/1012
Accepted for publication in ApJ
arxiv created 2010/04/28 · openalex publication_date 2010/05/06 · arxiv updated 2015/05/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
We have used the Extreme Ultraviolet Imaging Spectrometer on the Hinode spacecraft to observe large areas of outflow near an active region. These outflows are seen to persist for at least 6 days. The emission line profiles suggest that the outflow region is composed of multiple outflowing components, Doppler-shifted with respect to each other. We have modeled this scenario by imposing a double-Gaussian fit to the line profiles. These fits represent the profile markedly better than a single-Gaussian fit for Fe xii and xiii emission lines. For the fastest outflowing components, we find velocities as high as 200 km s −1 . However, there remains a correlation between the fitted line velocities and widths, suggesting that the outflows are not fully resolved by the double-Gaussian fit and that the outflow may be comprised of further components.