Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.2108a&link_type=abstract
American Astronomical Society, SPD meeting #40, #21.08; Bulletin of the American Astronomical Society, Vol. 41, p.856
Astronomy and Astrophysics
Astronomy
Scientific paper
We report observations of the first diffuse coronal wave detected by Hinode/XRT. The event occurred near the West solar limb on 23 May 2007, originating from active region (AR) 10956. The bright emission expanded both to the East and South of the AR. We combine the XRT results with data from STEREO (B) and a potential magnetic field extrapolation to understand the global magnetic field connectivity. We consider that the brightenings seen to the East and South of the source AR are generated by different physical processes, due to the distinct magnetic environments in these regions. We attribute the brightening to the East of the AR to compression and channelling of the plasma along large-scale loops. The brightening to the South of the AR expands across the quiet Sun, making the southern component a likely candidate for a classical diffuse coronal wave.
We analyse the bright front in STEREO/EUVI 171, 195 and 284 A images, as well as in XRT data, finding it to be largely co-spatial in all bandpasses. The expansion velocity of the diffuse bright front is 250 (± 85) km/s. We also exploit the near-limb properties of this event by combining STEREO/COR1 and EUVI data to derive a full picture of the low-coronal development of the eruption. The COR1 data show that the southern-most outer edge of the CME is progressively displaced southward. The core coronal dimmings map to the bright core of the CME; the secondary coronal dimmings map to the CME cavity; and the diffuse coronal "wave” maps to the outermost edge of the expanding CME shell. The analysis of this near-limb event has implications for understanding earlier eruptions originating from the same AR. In particular, we present a new analysis of the 19 May 2007 event.
NASA grants NNX09AB11G and NNH07AB97C supported this work.
Attrill Gemma
Engell Alexander J.
Grigis Paolo
Testa Paola
Wills-Davey Meredith J.
No associations
LandOfFree
Hinode/XRT and Stereo Observations of the May 2007 Coronal Wave-cme-dimming Events does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Hinode/XRT and Stereo Observations of the May 2007 Coronal Wave-cme-dimming Events, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hinode/XRT and Stereo Observations of the May 2007 Coronal Wave-cme-dimming Events will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1113125