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Abstract: Combining STEREO, ACE and Hinode observations has presented an opportunity tofollow a filament eruption and coronal mass ejection CME on the 17th ofOctober 2007 from an active region AR inside a coronal hole CH into theheliosphere. This particular combination of `open- and closed magnetictopologies provides an ideal scenario for interchange reconnection to takeplace. With Hinode and STEREO data we were able to identify the emergence timeand type of structure seen in the in-situ data four days later. On the 21st,ACE observed in-situ the passage of an ICME with `open- magnetic topology. Themagnetic field configuration of the source, a mature AR located inside anequatorial CH, has important implications for the solar and interplanetarysignatures of the eruption. We interpret the formation of an `anemone-structure of the erupting AR and the passage in-situ of the ICME beingdisconnected at one leg, as manifested by uni-directional suprathermal electronflux in the ICME, to be a direct result of interchange reconnection betweenclosed loops of the CME originating from the AR and `open- field lines of thesurrounding CH.



Author: D. Baker, A. P. Rouillard, L. van Driel-Gesztelyi, P. Demoulin, L. K. Harra, B. Lavraud, J. A. Davies, A. Optiz, J. G. Luhmann, J

Source: https://arxiv.org/



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