Observational Evidence for the Associated Formation of Blobs and Raining Inflows in the Solar Corona

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http://hdl.handle.net/10138/178856

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Sanchez-Diaz , E , Rouillard , A P , Davies , J A , Lavraud , B , Sheeley , N R , Pinto , R F , Kilpua , E , Plotnikov , I & Genot , V 2017 , ' Observational Evidence for the Associated Formation of Blobs and Raining Inflows in the Solar Corona ' , Astrophysical Journal Letters , vol. 835 , no. 1 , 7 . https://doi.org/10.3847/2041-8213/835/1/L7

Title: Observational Evidence for the Associated Formation of Blobs and Raining Inflows in the Solar Corona
Author: Sanchez-Diaz, E.; Rouillard, A. P.; Davies, J. A.; Lavraud, B.; Sheeley, N. R.; Pinto, R. F.; Kilpua, E.; Plotnikov, I.; Genot, V.
Other contributor: University of Helsinki, Department of Physics

Date: 2017-01-20
Language: eng
Number of pages: 7
Belongs to series: Astrophysical Journal Letters
ISSN: 2041-8205
DOI: https://doi.org/10.3847/2041-8213/835/1/L7
URI: http://hdl.handle.net/10138/178856
Abstract: The origin of the slow solar wind is still a topic of much debate. The continual emergence of small transient structures from helmet streamers is thought to constitute one of the main sources of the slow wind. Determining the height at which these transients are released is an important factor in determining the conditions under which the slow solar wind forms. To this end, we have carried out a multipoint analysis of small transient structures released from a north-south tilted helmet streamer into the slow solar wind over a broad range of position angles during Carrington Rotation 2137. Combining the remote-sensing observations taken by the Solar-TErrestrial RElations Observatory (STEREO) mission with coronagraphic observations from the SOlar and Heliospheric Observatory (SOHO) spacecraft, we show that the release of such small transient structures (often called blobs), which subsequently move away from the Sun, is associated with the concomitant formation of transient structures collapsing back toward the Sun; the latter have been referred to by previous authors as "raining inflows." This is the first direct association between outflowing blobs and raining inflows, which locates the formation of blobs above the helmet streamers and gives strong support that the blobs are released by magnetic reconnection.
Subject: magnetic reconnection
solar wind
Sun: corona
Sun: heliosphere
R-CIRCLE-DOT
WIND
ORIGIN
RECONNECTION
ACCELERATION
CONNECTION
TRANSIENTS
EARTH
FLOW
115 Astronomy, Space science
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