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Physical processes involved in the EUV "Surge" Event of 09 May 2012
Marcelo López Fuentes, Cristina H. Mandrini, Mariano Poisson +4
We study an EUV confined ejection observed on 09 May 2012 in active region (AR) NOAA 11476. For the analysis we use observations in multiple wavelengths (EUV, X-rays, H, and mag…
Sequential eruptions triggered by flux emergence - observations and modeling
Sally Dacie, Tibor Torok, Pascal Demoulin +5
We describe and analyze observations by the Solar Dynamics Observatory of the emergence of a small, bipolar active region within an area of unipolar magnetic flux that was surround…
Study of Three-Dimensional Magnetic Structure and the Successive Eruptive Nature of Active Region 12371
P. Vemareddy, P. Demóulin
We study the magnetic structure of successively erupting sigmoid in active region 12371 by modeling the quasi-static coronal field evolution with non-linear force-free field (NLFFF…
Coronal Elemental Abundances in Solar Emerging Flux Regions
Deborah Baker, David H. Brooks, Lidia van Driel-Gesztelyi +5
The chemical composition of solar and stellar atmospheres differs from that of their photospheres. Abundances of elements with low first ionization potential (FIP) are enhanced in…