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  Coronal mass ejection followed by a prominence eruption and a plasma blob as observed by Solar Orbiter

Bemporad, A., Andretta, V., Susino, R., Mancuso, S., Spadaro, D., Mierla, M., et al. (2022). Coronal mass ejection followed by a prominence eruption and a plasma blob as observed by Solar Orbiter. Astronomy and Astrophysics, 665, A7. doi:10.1051/0004-6361/202243162.

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Bemporad, A., Author
Andretta, V., Author
Susino, R., Author
Mancuso, S., Author
Spadaro, D., Author
Mierla, M., Author
Berghmans, D., Author
D'Huys, E., Author
Zhukov, A. N., Author
Talpeanu, D. -C., Author
Colaninno, R., Author
Hess, P.1, Author           
Koza, J., Author
Jejčič, S., Author
Heinzel, P.2, Author           
Antonucci, E., Author
Da Deppo, V., Author
Fineschi, S., Author
Frassati, F., Author
Jerse, G., Author
Landini, F., AuthorNaletto, G., AuthorNicolini, G., AuthorPancrazzi, M., AuthorRomoli, M., AuthorSasso, C., AuthorSlemer, A., AuthorStangalini, M., AuthorTeriaca, L.3, Author            more..
1Huber, Robert / Structure Research, Max Planck Institute of Biochemistry, Max Planck Society, ou_1565155              
2Stellar Astrophysics, MPI for Astrophysics, Max Planck Society, ou_159882              
3Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              


Free keywords: Sun: atmosphere; Sun: UV radiation; Sun: corona; Sun: coronal mass ejections (CMEs); Astrophysics - Solar and Stellar Astrophysics; Physics - Space Physics
 Abstract: Context. On 2021 February 12, two subsequent eruptions occurred above the western limb of the Sun, as seen along the Sun-Earth line. The first event was a typical slow coronal mass ejection (CME), followed ∼7 h later by a smaller and collimated prominence eruption, originating south of the CME, followed by a plasma blob. These events were observed not only by the SOHO and STEREO-A missions, but also by the suite of remote-sensing instruments on board Solar Orbiter.
Aims: We show how data acquired by the Full Sun Imager (FSI), the Metis coronagraph, and the Heliospheric Imager (HI) from the Solar Orbiter perspective can be combined to study the eruptions and different source regions. Moreover, we show how Metis data can be analyzed to provide new information about solar eruptions.
Methods: Different 3D reconstruction methods were applied to the data acquired by different spacecraft, including remote-sensing instruments on board Solar Orbiter. Images acquired by the two Metis channels in the visible light (VL) and H I Ly-α line (UV) were combined to derive physical information about the expanding plasma. The polarization ratio technique was also applied for the first time to Metis images acquired in the VL channel.
Results: The two eruptions were followed in 3D from their source region to their expansion in the intermediate corona. By combining VL and UV Metis data, the formation of a post-CME current sheet (CS) was followed for the first time in the intermediate corona. The plasma temperature gradient across a post-CME blob propagating along the CS was also measured for the first time. Application of the polarization ratio technique to Metis data shows that by combining four different polarization measurements, the errors are reduced by ∼5 − 7%. This constrains the 3D plasma distribution better. <P />Movies associated to Figs. 4-7 are available at <A href="https://www.aanda.org/10.1051/0004-6361/202243162/olm">https://www.aanda.org</A>


 Dates: 2022
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1051/0004-6361/202243162
ISSN: 0004-6361
 Degree: -



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Title: Astronomy and Astrophysics
Source Genre: Journal
Publ. Info: -
Pages: - Volume / Issue: 665 Sequence Number: - Start / End Page: A7 Identifier: -